diff --git a/openapi.json b/openapi.json
index de333ee..04f9652 100755
--- a/openapi.json
+++ b/openapi.json
@@ -3030,6 +3030,171 @@
         ]
       }
     },
+    "/v0/merchants/{merchant_code}/readers/{reader_id}/go-checkout": {
+      "post": {
+        "operationId": "CreateGoReaderCheckout",
+        "summary": "Create a Go Reader Payment",
+        "description": "Initiates a payment on the SumUp Go terminal identified by the reader ID.\n\nUse `client_transaction_id` as an idempotency key: retrying the request with the same value returns the result of the original payment instead of creating a duplicate.",
+        "parameters": [
+          {
+            "name": "Authorization",
+            "in": "header",
+            "description": "Access token in the format 'Bearer {token}'.",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "merchant_code",
+            "in": "path",
+            "description": "Short unique identifier for the merchant.",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "example": "MK10CL2A"
+            }
+          },
+          {
+            "name": "reader_id",
+            "in": "path",
+            "description": "The unique identifier of the reader.",
+            "required": true,
+            "schema": {
+              "$ref": "#/components/schemas/ReaderID"
+            }
+          }
+        ],
+        "requestBody": {
+          "description": "Payment details to initiate on the reader.",
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/ReaderPaymentRequestParams"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "Returns the result of the payment initiated on the reader.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ReaderPaymentResponse"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "The request is invalid.",
+            "content": {
+              "application/problem+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Problem"
+                },
+                "example": {
+                  "type": "https://developer.sumup.com/problem/bad-request",
+                  "title": "Bad Request",
+                  "status": 400,
+                  "detail": "Request validation failed."
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Authentication failed or missing required scope.",
+            "content": {
+              "application/problem+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Problem"
+                },
+                "example": {
+                  "type": "https://developer.sumup.com/problem/unauthorized",
+                  "title": "Unauthorized",
+                  "status": 401,
+                  "detail": "Authentication credentials are missing or invalid."
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "The requested Reader resource does not exist.",
+            "content": {
+              "application/problem+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Problem"
+                },
+                "example": {
+                  "type": "https://developer.sumup.com/problem/not-found",
+                  "title": "Requested resource couldn't be found.",
+                  "status": 404,
+                  "detail": "The requested resource doesn't exist or does not belong to you."
+                }
+              }
+            }
+          },
+          "422": {
+            "description": "The request could not be processed as it violates a business rule.",
+            "content": {
+              "application/problem+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Problem"
+                },
+                "example": {
+                  "type": "https://developer.sumup.com/problem/validation-error",
+                  "title": "Unprocessable Entity",
+                  "status": 422,
+                  "detail": "Validation failed."
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "An unexpected error occurred while processing the request.",
+            "content": {
+              "application/problem+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Problem"
+                },
+                "example": {
+                  "type": "https://developer.sumup.com/problem/internal-server-error",
+                  "title": "Internal Server Error",
+                  "status": 500,
+                  "detail": "An unexpected error occurred while processing the request."
+                }
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "apiKey": []
+          },
+          {
+            "oauth2": [
+              "payments",
+              "readers.write"
+            ]
+          }
+        ],
+        "tags": [
+          "Readers"
+        ],
+        "x-codegen": {
+          "method_name": "create_go_checkout",
+          "ignore": true
+        },
+        "x-permissions": [
+          "readers_checkout_create"
+        ],
+        "x-scopes": [
+          "payments",
+          "readers.write"
+        ]
+      }
+    },
     "/v0.1/memberships": {
       "get": {
         "operationId": "ListMemberships",
@@ -5711,6 +5876,122 @@
           "readers.write"
         ]
       }
+    },
+    "/v0.1/merchants/{merchant_code}/readers/{reader_id}/checkout/{checkout_id}": {
+      "get": {
+        "operationId": "GetReaderCheckout",
+        "summary": "Get a Reader Checkout",
+        "description": "Get a Checkout for a Reader.\n",
+        "parameters": [
+          {
+            "name": "merchant_code",
+            "in": "path",
+            "description": "Merchant Code",
+            "required": true,
+            "schema": {
+              "type": "string"
+            },
+            "example": "MC0X0ABC"
+          },
+          {
+            "name": "reader_id",
+            "in": "path",
+            "description": "The unique identifier of the Reader",
+            "required": true,
+            "schema": {
+              "type": "string"
+            },
+            "example": "rdr_3MSAFM23CK82VSTT4BN6RWSQ65"
+          },
+          {
+            "name": "checkout_id",
+            "in": "path",
+            "description": "The unique identifier of the Checkout",
+            "required": true,
+            "schema": {
+              "type": "string"
+            },
+            "example": "74ecff66-1655-43ed-8ce3-193f49fa602f"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The Checkout got successfully retrieved for the given reader.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/GetReaderCheckoutResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/CreateReaderCheckoutError"
+                }
+              },
+              "application/problem+json": {
+                "example": {
+                  "detail": "Unauthorized",
+                  "status": 401,
+                  "title": "Unauthorized",
+                  "type": "https://developer.sumup.com/problem/unauthorized"
+                },
+                "schema": {
+                  "$ref": "#/components/schemas/Problem"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Response when given reader or checkout is not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/NotFound"
+                }
+              },
+              "application/problem+json": {
+                "example": {
+                  "detail": "The requested resource doesn't exist or does not belong to you.",
+                  "status": 404,
+                  "title": "Requested resource couldn't be found.",
+                  "type": "https://developer.sumup.com/problem/not-found"
+                },
+                "schema": {
+                  "$ref": "#/components/schemas/Problem"
+                }
+              }
+            }
+          }
+        },
+        "callbacks": {},
+        "security": [
+          {
+            "apiKey": []
+          },
+          {
+            "oauth2": [
+              "readers.read"
+            ]
+          }
+        ],
+        "tags": [
+          "Readers"
+        ],
+        "x-codegen": {
+          "method_name": "get_checkout"
+        },
+        "x-permissions": [
+          "readers_checkout_view"
+        ],
+        "x-scopes": [
+          "readers.read"
+        ]
+      }
     }
   },
   "components": {
@@ -8066,6 +8347,97 @@
         "type": "string",
         "title": "Transaction ID"
       },
+      "Affiliate": {
+        "type": "object",
+        "properties": {
+          "app_id": {
+            "type": "string",
+            "example": "com.example.app"
+          },
+          "key": {
+            "type": "string",
+            "example": "123e4567-e89b-12d3-a456-426614174000"
+          }
+        },
+        "required": [
+          "app_id",
+          "key"
+        ]
+      },
+      "Amount": {
+        "type": "object",
+        "properties": {
+          "currency": {
+            "description": "Currency ISO 4217 code",
+            "type": "string",
+            "example": "MXN"
+          },
+          "value": {
+            "description": "Amount in minor units (e.g. cents).",
+            "type": "integer",
+            "example": 1000
+          }
+        },
+        "required": [
+          "currency",
+          "value"
+        ]
+      },
+      "ReaderID": {
+        "description": "Unique identifier of the reader that the payment is initiated on.",
+        "type": "string",
+        "example": "rdr_3MSAFM23CK82VSTT4BN6RWSQ65",
+        "maxLength": 30,
+        "minLength": 30
+      },
+      "ReaderPaymentRequestParams": {
+        "type": "object",
+        "properties": {
+          "affiliate": {
+            "$ref": "#/components/schemas/Affiliate"
+          },
+          "client_transaction_id": {
+            "description": "Caller-supplied correlation identifier, used as the idempotency key.",
+            "type": "string",
+            "example": "19e12390-72cf-4f9f-80b5-b0c8a67fa43f"
+          },
+          "tip_amount": {
+            "description": "Optional tip amount in minor units, added on top of total_amount.",
+            "type": "integer",
+            "example": 100
+          },
+          "total_amount": {
+            "$ref": "#/components/schemas/Amount"
+          }
+        },
+        "required": [
+          "total_amount",
+          "client_transaction_id"
+        ]
+      },
+      "ReaderPaymentResponse": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "$ref": "#/components/schemas/ReaderPaymentResponseData"
+          }
+        }
+      },
+      "ReaderPaymentResponseData": {
+        "type": "object",
+        "properties": {
+          "client_transaction_id": {
+            "description": "Caller-supplied correlation identifier that was provided in the request.",
+            "type": "string",
+            "example": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
+          },
+          "transaction_code": {
+            "description": "Transaction code returned by the acquirer/processing entity after processing the transaction.",
+            "type": "string",
+            "example": "TEENSK4W2K"
+          }
+        }
+      },
       "MembershipStatus": {
         "description": "The status of the membership.",
         "type": "string",
@@ -9246,13 +9618,6 @@
         ],
         "title": "Reader"
       },
-      "ReaderID": {
-        "description": "Unique identifier of the object.\n\nNote that this identifies the instance of the physical devices pairing with your SumUp account. If you [delete](https://developer.sumup.com/api/readers/delete-reader) a reader, and pair the device again, the ID will be different. Do not use this ID to refer to a physical device.",
-        "type": "string",
-        "example": "rdr_3MSAFM23CK82VSTT4BN6RWSQ65",
-        "maxLength": 30,
-        "minLength": 30
-      },
       "ReaderName": {
         "description": "Custom human-readable, user-defined name for easier identification of the reader.",
         "type": "string",
@@ -9393,6 +9758,165 @@
         ],
         "title": "CreateReaderCheckoutError"
       },
+      "GetReaderCheckoutResponse": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "object",
+            "properties": {
+              "card_type": {
+                "description": "Type of the card. Required for some countries",
+                "type": "string",
+                "enum": [
+                  "credit",
+                  "debit"
+                ],
+                "nullable": true
+              },
+              "checkout_id": {
+                "description": "Unique identifier for the checkout",
+                "type": "string",
+                "format": "uuid"
+              },
+              "client_transaction_id": {
+                "description": "Client transaction identifier associated with the checkout",
+                "type": "string"
+              },
+              "created_at": {
+                "description": "Checkout creation timestamp",
+                "type": "string",
+                "format": "date-time"
+              },
+              "installments": {
+                "description": "Number of installments for the transaction. Required for some countries.",
+                "type": "integer",
+                "nullable": true
+              },
+              "payment_failure_reason": {
+                "description": "Payment failure reason",
+                "type": "string",
+                "nullable": true
+              },
+              "payment_status": {
+                "description": "Payment status from payments v2 event",
+                "type": "string",
+                "nullable": true
+              },
+              "payment_type": {
+                "description": "Type of the payment. Required for some countries",
+                "type": "string",
+                "enum": [
+                  "card",
+                  "pix"
+                ]
+              },
+              "reader_firmware_version": {
+                "description": "Reader firmware version",
+                "type": "string"
+              },
+              "reader_serial_number": {
+                "description": "Device serial number",
+                "type": "string"
+              },
+              "status": {
+                "description": "Current status of the checkout",
+                "type": "string",
+                "enum": [
+                  "pending",
+                  "successful",
+                  "failed",
+                  "cancelled"
+                ]
+              },
+              "total_amount": {
+                "description": "Amount structure.\n\nThe amount is represented as an integer value altogether with the currency and the minor unit.\n\nFor example, EUR 1.00 is represented as value 100 with minor unit of 2.\n",
+                "type": "object",
+                "example": {
+                  "currency": "EUR",
+                  "minor_unit": 2,
+                  "value": 1000
+                },
+                "properties": {
+                  "currency": {
+                    "description": "Currency ISO 4217 code",
+                    "type": "string",
+                    "example": "EUR"
+                  },
+                  "minor_unit": {
+                    "description": "The minor units of the currency.\nIt represents the number of decimals of the currency. For the currencies CLP, COP and HUF, the minor unit is 0.\n",
+                    "type": "integer",
+                    "example": 2,
+                    "minimum": 0
+                  },
+                  "value": {
+                    "description": "Integer value of the amount.",
+                    "type": "integer",
+                    "example": 1000,
+                    "minimum": 0
+                  }
+                },
+                "required": [
+                  "currency",
+                  "minor_unit",
+                  "value"
+                ],
+                "title": "Money"
+              },
+              "updated_at": {
+                "description": "Checkout last update timestamp",
+                "type": "string",
+                "format": "date-time"
+              },
+              "valid_until": {
+                "description": "Checkout expiration timestamp. After this time, the checkout will be automatically cancelled.",
+                "type": "string",
+                "format": "date-time",
+                "nullable": true
+              }
+            },
+            "required": [
+              "checkout_id",
+              "client_transaction_id",
+              "reader_serial_number",
+              "payment_type",
+              "card_type",
+              "reader_firmware_version",
+              "installments",
+              "payment_status",
+              "valid_until",
+              "created_at",
+              "updated_at",
+              "status",
+              "total_amount"
+            ]
+          }
+        },
+        "example": {
+          "data": {
+            "card_type": "credit",
+            "checkout_id": "00e33a36-c99b-4cb2-b635-b90c1455c9c8",
+            "client_transaction_id": "00e33a36-c99b-4cb2-b635-b90c1455c9c8",
+            "created_at": "2026-07-07T20:41:16.315434Z",
+            "installments": 1,
+            "payment_status": "pending",
+            "payment_type": "card",
+            "reader_firmware_version": "3.3.3.21",
+            "reader_serial_number": "1234567890",
+            "status": "pending",
+            "total_amount": {
+              "currency": "EUR",
+              "minor_unit": 2,
+              "value": 10000
+            },
+            "updated_at": "2026-07-07T20:42:18.117244Z",
+            "valid_until": "2026-07-07T20:41:16.315434Z"
+          }
+        },
+        "required": [
+          "data"
+        ],
+        "title": "GetReaderCheckoutResponse"
+      },
       "StatusResponse": {
         "description": "Status of a device",
         "type": "object",
@@ -9577,6 +10101,11 @@
           "data": {
             "type": "object",
             "properties": {
+              "checkout_id": {
+                "description": "The checkout ID is a unique identifier for the checkout.\n",
+                "type": "string",
+                "example": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
+              },
               "client_transaction_id": {
                 "description": "The client transaction ID is a unique identifier for the transaction that is generated for the client.\n\nIt can be used later to fetch the transaction details via the [Transactions API](https://developer.sumup.com/api/transactions/get).\n",
                 "type": "string",
@@ -9590,6 +10119,7 @@
         },
         "example": {
           "data": {
+            "checkout_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
             "client_transaction_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
           }
         },
@@ -10676,6 +11206,70 @@
           }
         }
       },
+      "BadRequest": {
+        "description": "The request is invalid.",
+        "content": {
+          "application/problem+json": {
+            "schema": {
+              "$ref": "#/components/schemas/Problem"
+            },
+            "example": {
+              "type": "https://developer.sumup.com/problem/bad-request",
+              "title": "Bad Request",
+              "status": 400,
+              "detail": "Request validation failed."
+            }
+          }
+        }
+      },
+      "Unauthorized": {
+        "description": "Authentication failed or missing required scope.",
+        "content": {
+          "application/problem+json": {
+            "schema": {
+              "$ref": "#/components/schemas/Problem"
+            },
+            "example": {
+              "type": "https://developer.sumup.com/problem/unauthorized",
+              "title": "Unauthorized",
+              "status": 401,
+              "detail": "Authentication credentials are missing or invalid."
+            }
+          }
+        }
+      },
+      "NotFound": {
+        "description": "The requested Reader resource does not exist.",
+        "content": {
+          "application/problem+json": {
+            "schema": {
+              "$ref": "#/components/schemas/Problem"
+            },
+            "example": {
+              "type": "https://developer.sumup.com/problem/not-found",
+              "title": "Requested resource couldn't be found.",
+              "status": 404,
+              "detail": "The requested resource doesn't exist or does not belong to you."
+            }
+          }
+        }
+      },
+      "InternalError": {
+        "description": "An unexpected error occurred while processing the request.",
+        "content": {
+          "application/problem+json": {
+            "schema": {
+              "$ref": "#/components/schemas/Problem"
+            },
+            "example": {
+              "type": "https://developer.sumup.com/problem/internal-server-error",
+              "title": "Internal Server Error",
+              "status": 500,
+              "detail": "An unexpected error occurred while processing the request."
+            }
+          }
+        }
+      },
       "ListMemberships": {
         "description": "Returns a list of Membership objects.",
         "content": {
@@ -10848,6 +11442,9 @@
         }
       ]
     },
+    {
+      "name": "Readers"
+    },
     {
       "name": "Members",
       "description": "Endpoints to manage account members. Members are users that have membership within merchant accounts.",
@@ -10886,15 +11483,6 @@
           "$ref": "#/components/schemas/Merchant"
         }
       ]
-    },
-    {
-      "name": "Readers",
-      "description": "A reader represents a device that accepts payments. You can use the SumUp Solo to accept in-person payments.",
-      "x-core-objects": [
-        {
-          "$ref": "#/components/schemas/Reader"
-        }
-      ]
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/sumup/sdk/clients/ReadersAsyncClient.java b/src/main/java/com/sumup/sdk/clients/ReadersAsyncClient.java
index 260510b..6793fa9 100644
--- a/src/main/java/com/sumup/sdk/clients/ReadersAsyncClient.java
+++ b/src/main/java/com/sumup/sdk/clients/ReadersAsyncClient.java
@@ -11,12 +11,7 @@
 import java.util.Objects;
 import java.util.concurrent.CompletableFuture;
 
-/**
- * Client for the "Readers" API group.
- *
- * <p>A reader represents a device that accepts payments. You can use the SumUp Solo to accept
- * in-person payments.
- */
+/** Client for the "Readers" API group. */
 public final class ReadersAsyncClient {
   private final ApiClient apiClient;
 
@@ -159,6 +154,75 @@ public CompletableFuture<com.sumup.sdk.models.CreateReaderCheckoutResponse> crea
         requestOptions);
   }
 
+  /**
+   * Create a Go Reader Payment
+   *
+   * <p>Initiates a payment on the SumUp Go terminal identified by the reader ID. Use
+   * `client_transaction_id` as an idempotency key: retrying the request with the same value returns
+   * the result of the original payment instead of creating a duplicate.
+   *
+   * <p>Operation ID: CreateGoReaderCheckout
+   *
+   * @param merchantCode Short unique identifier for the merchant.
+   * @param readerId The unique identifier of the reader.
+   * @param request Payment details to initiate on the reader.
+   *     <p>Call the overload that accepts RequestOptions to customize headers, authorization, or
+   *     request timeout.
+   * @return CompletableFuture resolved with com.sumup.sdk.models.ReaderPaymentResponse parsed
+   *     response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public CompletableFuture<com.sumup.sdk.models.ReaderPaymentResponse> createGoCheckout(
+      String merchantCode,
+      com.sumup.sdk.models.ReaderId readerId,
+      com.sumup.sdk.models.ReaderPaymentRequestParams request)
+      throws ApiException {
+    return createGoCheckout(merchantCode, readerId, request, null);
+  }
+
+  /**
+   * Create a Go Reader Payment
+   *
+   * <p>Initiates a payment on the SumUp Go terminal identified by the reader ID. Use
+   * `client_transaction_id` as an idempotency key: retrying the request with the same value returns
+   * the result of the original payment instead of creating a duplicate.
+   *
+   * <p>Operation ID: CreateGoReaderCheckout
+   *
+   * @param merchantCode Short unique identifier for the merchant.
+   * @param readerId The unique identifier of the reader.
+   * @param request Payment details to initiate on the reader.
+   * @param requestOptions Request-specific overrides (headers, authorization, or timeout). Pass
+   *     {@code null} to use client defaults.
+   * @return CompletableFuture resolved with com.sumup.sdk.models.ReaderPaymentResponse parsed
+   *     response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public CompletableFuture<com.sumup.sdk.models.ReaderPaymentResponse> createGoCheckout(
+      String merchantCode,
+      com.sumup.sdk.models.ReaderId readerId,
+      com.sumup.sdk.models.ReaderPaymentRequestParams request,
+      RequestOptions requestOptions)
+      throws ApiException {
+    Objects.requireNonNull(merchantCode, "merchantCode");
+    Objects.requireNonNull(readerId, "readerId");
+    Objects.requireNonNull(request, "request");
+    String path = "/v0/merchants/{merchant_code}/readers/{reader_id}/go-checkout";
+    path =
+        path.replace(
+            "{merchant_code}", ApiClient.urlEncode(ApiClient.parameterValue(merchantCode)));
+    path = path.replace("{reader_id}", ApiClient.urlEncode(ApiClient.parameterValue(readerId)));
+
+    return this.apiClient.sendAsync(
+        HttpMethod.POST,
+        path,
+        null,
+        null,
+        request,
+        new TypeReference<com.sumup.sdk.models.ReaderPaymentResponse>() {},
+        requestOptions);
+  }
+
   /**
    * Delete a reader
    *
@@ -290,6 +354,66 @@ public CompletableFuture<com.sumup.sdk.models.Reader> get(
         requestOptions);
   }
 
+  /**
+   * Get a Reader Checkout
+   *
+   * <p>Get a Checkout for a Reader.
+   *
+   * <p>Operation ID: GetReaderCheckout
+   *
+   * @param checkoutId The unique identifier of the Checkout
+   * @param merchantCode Merchant Code
+   * @param readerId The unique identifier of the Reader
+   *     <p>Call the overload that accepts RequestOptions to customize headers, authorization, or
+   *     request timeout.
+   * @return CompletableFuture resolved with com.sumup.sdk.models.GetReaderCheckoutResponse parsed
+   *     response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public CompletableFuture<com.sumup.sdk.models.GetReaderCheckoutResponse> getCheckout(
+      String checkoutId, String merchantCode, String readerId) throws ApiException {
+    return getCheckout(checkoutId, merchantCode, readerId, null);
+  }
+
+  /**
+   * Get a Reader Checkout
+   *
+   * <p>Get a Checkout for a Reader.
+   *
+   * <p>Operation ID: GetReaderCheckout
+   *
+   * @param checkoutId The unique identifier of the Checkout
+   * @param merchantCode Merchant Code
+   * @param readerId The unique identifier of the Reader
+   * @param requestOptions Request-specific overrides (headers, authorization, or timeout). Pass
+   *     {@code null} to use client defaults.
+   * @return CompletableFuture resolved with com.sumup.sdk.models.GetReaderCheckoutResponse parsed
+   *     response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public CompletableFuture<com.sumup.sdk.models.GetReaderCheckoutResponse> getCheckout(
+      String checkoutId, String merchantCode, String readerId, RequestOptions requestOptions)
+      throws ApiException {
+    Objects.requireNonNull(checkoutId, "checkoutId");
+    Objects.requireNonNull(merchantCode, "merchantCode");
+    Objects.requireNonNull(readerId, "readerId");
+    String path = "/v0.1/merchants/{merchant_code}/readers/{reader_id}/checkout/{checkout_id}";
+    path = path.replace("{checkout_id}", ApiClient.urlEncode(ApiClient.parameterValue(checkoutId)));
+    path =
+        path.replace(
+            "{merchant_code}", ApiClient.urlEncode(ApiClient.parameterValue(merchantCode)));
+    path = path.replace("{reader_id}", ApiClient.urlEncode(ApiClient.parameterValue(readerId)));
+
+    return this.apiClient.sendAsync(
+        HttpMethod.GET,
+        path,
+        null,
+        null,
+        null,
+        new TypeReference<com.sumup.sdk.models.GetReaderCheckoutResponse>() {},
+        requestOptions);
+  }
+
   /**
    * Get a Reader Status
    *
diff --git a/src/main/java/com/sumup/sdk/clients/ReadersClient.java b/src/main/java/com/sumup/sdk/clients/ReadersClient.java
index 0c11dff..bf10efd 100644
--- a/src/main/java/com/sumup/sdk/clients/ReadersClient.java
+++ b/src/main/java/com/sumup/sdk/clients/ReadersClient.java
@@ -10,12 +10,7 @@
 import java.util.Map;
 import java.util.Objects;
 
-/**
- * Client for the "Readers" API group.
- *
- * <p>A reader represents a device that accepts payments. You can use the SumUp Solo to accept
- * in-person payments.
- */
+/** Client for the "Readers" API group. */
 public final class ReadersClient {
   private final ApiClient apiClient;
 
@@ -156,6 +151,73 @@ public com.sumup.sdk.models.CreateReaderCheckoutResponse createCheckout(
         requestOptions);
   }
 
+  /**
+   * Create a Go Reader Payment
+   *
+   * <p>Initiates a payment on the SumUp Go terminal identified by the reader ID. Use
+   * `client_transaction_id` as an idempotency key: retrying the request with the same value returns
+   * the result of the original payment instead of creating a duplicate.
+   *
+   * <p>Operation ID: CreateGoReaderCheckout
+   *
+   * @param merchantCode Short unique identifier for the merchant.
+   * @param readerId The unique identifier of the reader.
+   * @param request Payment details to initiate on the reader.
+   *     <p>Call the overload that accepts RequestOptions to customize headers, authorization, or
+   *     request timeout.
+   * @return com.sumup.sdk.models.ReaderPaymentResponse parsed response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public com.sumup.sdk.models.ReaderPaymentResponse createGoCheckout(
+      String merchantCode,
+      com.sumup.sdk.models.ReaderId readerId,
+      com.sumup.sdk.models.ReaderPaymentRequestParams request)
+      throws ApiException {
+    return createGoCheckout(merchantCode, readerId, request, null);
+  }
+
+  /**
+   * Create a Go Reader Payment
+   *
+   * <p>Initiates a payment on the SumUp Go terminal identified by the reader ID. Use
+   * `client_transaction_id` as an idempotency key: retrying the request with the same value returns
+   * the result of the original payment instead of creating a duplicate.
+   *
+   * <p>Operation ID: CreateGoReaderCheckout
+   *
+   * @param merchantCode Short unique identifier for the merchant.
+   * @param readerId The unique identifier of the reader.
+   * @param request Payment details to initiate on the reader.
+   * @param requestOptions Request-specific overrides (headers, authorization, or timeout). Pass
+   *     {@code null} to use client defaults.
+   * @return com.sumup.sdk.models.ReaderPaymentResponse parsed response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public com.sumup.sdk.models.ReaderPaymentResponse createGoCheckout(
+      String merchantCode,
+      com.sumup.sdk.models.ReaderId readerId,
+      com.sumup.sdk.models.ReaderPaymentRequestParams request,
+      RequestOptions requestOptions)
+      throws ApiException {
+    Objects.requireNonNull(merchantCode, "merchantCode");
+    Objects.requireNonNull(readerId, "readerId");
+    Objects.requireNonNull(request, "request");
+    String path = "/v0/merchants/{merchant_code}/readers/{reader_id}/go-checkout";
+    path =
+        path.replace(
+            "{merchant_code}", ApiClient.urlEncode(ApiClient.parameterValue(merchantCode)));
+    path = path.replace("{reader_id}", ApiClient.urlEncode(ApiClient.parameterValue(readerId)));
+
+    return this.apiClient.send(
+        HttpMethod.POST,
+        path,
+        null,
+        null,
+        request,
+        new TypeReference<com.sumup.sdk.models.ReaderPaymentResponse>() {},
+        requestOptions);
+  }
+
   /**
    * Delete a reader
    *
@@ -284,6 +346,64 @@ public com.sumup.sdk.models.Reader get(
         requestOptions);
   }
 
+  /**
+   * Get a Reader Checkout
+   *
+   * <p>Get a Checkout for a Reader.
+   *
+   * <p>Operation ID: GetReaderCheckout
+   *
+   * @param checkoutId The unique identifier of the Checkout
+   * @param merchantCode Merchant Code
+   * @param readerId The unique identifier of the Reader
+   *     <p>Call the overload that accepts RequestOptions to customize headers, authorization, or
+   *     request timeout.
+   * @return com.sumup.sdk.models.GetReaderCheckoutResponse parsed response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public com.sumup.sdk.models.GetReaderCheckoutResponse getCheckout(
+      String checkoutId, String merchantCode, String readerId) throws ApiException {
+    return getCheckout(checkoutId, merchantCode, readerId, null);
+  }
+
+  /**
+   * Get a Reader Checkout
+   *
+   * <p>Get a Checkout for a Reader.
+   *
+   * <p>Operation ID: GetReaderCheckout
+   *
+   * @param checkoutId The unique identifier of the Checkout
+   * @param merchantCode Merchant Code
+   * @param readerId The unique identifier of the Reader
+   * @param requestOptions Request-specific overrides (headers, authorization, or timeout). Pass
+   *     {@code null} to use client defaults.
+   * @return com.sumup.sdk.models.GetReaderCheckoutResponse parsed response.
+   * @throws ApiException if the SumUp API returns an error.
+   */
+  public com.sumup.sdk.models.GetReaderCheckoutResponse getCheckout(
+      String checkoutId, String merchantCode, String readerId, RequestOptions requestOptions)
+      throws ApiException {
+    Objects.requireNonNull(checkoutId, "checkoutId");
+    Objects.requireNonNull(merchantCode, "merchantCode");
+    Objects.requireNonNull(readerId, "readerId");
+    String path = "/v0.1/merchants/{merchant_code}/readers/{reader_id}/checkout/{checkout_id}";
+    path = path.replace("{checkout_id}", ApiClient.urlEncode(ApiClient.parameterValue(checkoutId)));
+    path =
+        path.replace(
+            "{merchant_code}", ApiClient.urlEncode(ApiClient.parameterValue(merchantCode)));
+    path = path.replace("{reader_id}", ApiClient.urlEncode(ApiClient.parameterValue(readerId)));
+
+    return this.apiClient.send(
+        HttpMethod.GET,
+        path,
+        null,
+        null,
+        null,
+        new TypeReference<com.sumup.sdk.models.GetReaderCheckoutResponse>() {},
+        requestOptions);
+  }
+
   /**
    * Get a Reader Status
    *
diff --git a/src/main/java/com/sumup/sdk/models/Affiliate.java b/src/main/java/com/sumup/sdk/models/Affiliate.java
index 6e3166e..cf977ca 100644
--- a/src/main/java/com/sumup/sdk/models/Affiliate.java
+++ b/src/main/java/com/sumup/sdk/models/Affiliate.java
@@ -3,36 +3,8 @@
 
 import java.util.Objects;
 
-/**
- * Affiliate metadata for the transaction. It is a field that allow for integrators to track the
- * source of the transaction.
- */
-public record Affiliate(
-    /**
-     * Application ID of the affiliate. It is a unique identifier for the application and should be
-     * set by the integrator in the [Affiliate Keys](https://developer.sumup.com/affiliate-keys)
-     * page.
-     */
-    String appId,
-
-    /**
-     * Foreign transaction ID of the affiliate. It is a unique identifier for the transaction. It
-     * can be used later to fetch the transaction details via the [Transactions
-     * API](https://developer.sumup.com/api/transactions/get).
-     */
-    String foreignTransactionId,
-
-    /**
-     * Key of the affiliate. It is a unique identifier for the key and should be generated by the
-     * integrator in the [Affiliate Keys](https://developer.sumup.com/affiliate-keys) page.
-     */
-    String key,
+public record Affiliate(String appId, String key) {
 
-    /**
-     * Additional metadata for the transaction. It is key-value object that can be associated with
-     * the transaction.
-     */
-    java.util.Map<String, Object> tags) {
   /**
    * Creates a builder for Affiliate.
    *
@@ -45,18 +17,14 @@ public static Builder builder() {
   /** Builder for Affiliate instances. */
   public static final class Builder {
     private String appId;
-    private String foreignTransactionId;
     private String key;
-    private java.util.Map<String, Object> tags;
 
     private Builder() {}
 
     /**
      * Sets the value for {@code appId}.
      *
-     * @param appId Application ID of the affiliate. It is a unique identifier for the application
-     *     and should be set by the integrator in the [Affiliate
-     *     Keys](https://developer.sumup.com/affiliate-keys) page.
+     * @param appId Value for the appId field.
      * @return This builder instance.
      */
     public Builder appId(String appId) {
@@ -64,25 +32,10 @@ public Builder appId(String appId) {
       return this;
     }
 
-    /**
-     * Sets the value for {@code foreignTransactionId}.
-     *
-     * @param foreignTransactionId Foreign transaction ID of the affiliate. It is a unique
-     *     identifier for the transaction. It can be used later to fetch the transaction details via
-     *     the [Transactions API](https://developer.sumup.com/api/transactions/get).
-     * @return This builder instance.
-     */
-    public Builder foreignTransactionId(String foreignTransactionId) {
-      this.foreignTransactionId = foreignTransactionId;
-      return this;
-    }
-
     /**
      * Sets the value for {@code key}.
      *
-     * @param key Key of the affiliate. It is a unique identifier for the key and should be
-     *     generated by the integrator in the [Affiliate
-     *     Keys](https://developer.sumup.com/affiliate-keys) page.
+     * @param key Value for the key field.
      * @return This builder instance.
      */
     public Builder key(String key) {
@@ -90,18 +43,6 @@ public Builder key(String key) {
       return this;
     }
 
-    /**
-     * Sets the value for {@code tags}.
-     *
-     * @param tags Additional metadata for the transaction. It is key-value object that can be
-     *     associated with the transaction.
-     * @return This builder instance.
-     */
-    public Builder tags(java.util.Map<String, Object> tags) {
-      this.tags = tags;
-      return this;
-    }
-
     /**
      * Builds an immutable Affiliate instance.
      *
@@ -109,10 +50,7 @@ public Builder tags(java.util.Map<String, Object> tags) {
      */
     public Affiliate build() {
       return new Affiliate(
-          Objects.requireNonNull(appId, "appId"),
-          Objects.requireNonNull(foreignTransactionId, "foreignTransactionId"),
-          Objects.requireNonNull(key, "key"),
-          tags);
+          Objects.requireNonNull(appId, "appId"), Objects.requireNonNull(key, "key"));
     }
   }
 }
diff --git a/src/main/java/com/sumup/sdk/models/Affiliate2.java b/src/main/java/com/sumup/sdk/models/Affiliate2.java
new file mode 100644
index 0000000..d8b1e9e
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/Affiliate2.java
@@ -0,0 +1,118 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import java.util.Objects;
+
+/**
+ * Affiliate metadata for the transaction. It is a field that allow for integrators to track the
+ * source of the transaction.
+ */
+public record Affiliate2(
+    /**
+     * Application ID of the affiliate. It is a unique identifier for the application and should be
+     * set by the integrator in the [Affiliate Keys](https://developer.sumup.com/affiliate-keys)
+     * page.
+     */
+    String appId,
+
+    /**
+     * Foreign transaction ID of the affiliate. It is a unique identifier for the transaction. It
+     * can be used later to fetch the transaction details via the [Transactions
+     * API](https://developer.sumup.com/api/transactions/get).
+     */
+    String foreignTransactionId,
+
+    /**
+     * Key of the affiliate. It is a unique identifier for the key and should be generated by the
+     * integrator in the [Affiliate Keys](https://developer.sumup.com/affiliate-keys) page.
+     */
+    String key,
+
+    /**
+     * Additional metadata for the transaction. It is key-value object that can be associated with
+     * the transaction.
+     */
+    java.util.Map<String, Object> tags) {
+  /**
+   * Creates a builder for Affiliate2.
+   *
+   * @return Builder that constructs immutable Affiliate2 instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for Affiliate2 instances. */
+  public static final class Builder {
+    private String appId;
+    private String foreignTransactionId;
+    private String key;
+    private java.util.Map<String, Object> tags;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code appId}.
+     *
+     * @param appId Application ID of the affiliate. It is a unique identifier for the application
+     *     and should be set by the integrator in the [Affiliate
+     *     Keys](https://developer.sumup.com/affiliate-keys) page.
+     * @return This builder instance.
+     */
+    public Builder appId(String appId) {
+      this.appId = appId;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code foreignTransactionId}.
+     *
+     * @param foreignTransactionId Foreign transaction ID of the affiliate. It is a unique
+     *     identifier for the transaction. It can be used later to fetch the transaction details via
+     *     the [Transactions API](https://developer.sumup.com/api/transactions/get).
+     * @return This builder instance.
+     */
+    public Builder foreignTransactionId(String foreignTransactionId) {
+      this.foreignTransactionId = foreignTransactionId;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code key}.
+     *
+     * @param key Key of the affiliate. It is a unique identifier for the key and should be
+     *     generated by the integrator in the [Affiliate
+     *     Keys](https://developer.sumup.com/affiliate-keys) page.
+     * @return This builder instance.
+     */
+    public Builder key(String key) {
+      this.key = key;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code tags}.
+     *
+     * @param tags Additional metadata for the transaction. It is key-value object that can be
+     *     associated with the transaction.
+     * @return This builder instance.
+     */
+    public Builder tags(java.util.Map<String, Object> tags) {
+      this.tags = tags;
+      return this;
+    }
+
+    /**
+     * Builds an immutable Affiliate2 instance.
+     *
+     * @return Immutable Affiliate2.
+     */
+    public Affiliate2 build() {
+      return new Affiliate2(
+          Objects.requireNonNull(appId, "appId"),
+          Objects.requireNonNull(foreignTransactionId, "foreignTransactionId"),
+          Objects.requireNonNull(key, "key"),
+          tags);
+    }
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/Amount.java b/src/main/java/com/sumup/sdk/models/Amount.java
new file mode 100644
index 0000000..2526400
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/Amount.java
@@ -0,0 +1,60 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import java.util.Objects;
+
+public record Amount(
+    /** Currency ISO 4217 code */
+    String currency,
+
+    /** Amount in minor units (e.g. cents). */
+    Long value) {
+  /**
+   * Creates a builder for Amount.
+   *
+   * @return Builder that constructs immutable Amount instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for Amount instances. */
+  public static final class Builder {
+    private String currency;
+    private Long value;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code currency}.
+     *
+     * @param currency Currency ISO 4217 code
+     * @return This builder instance.
+     */
+    public Builder currency(String currency) {
+      this.currency = currency;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code value}.
+     *
+     * @param value Amount in minor units (e.g. cents).
+     * @return This builder instance.
+     */
+    public Builder value(Long value) {
+      this.value = value;
+      return this;
+    }
+
+    /**
+     * Builds an immutable Amount instance.
+     *
+     * @return Immutable Amount.
+     */
+    public Amount build() {
+      return new Amount(
+          Objects.requireNonNull(currency, "currency"), Objects.requireNonNull(value, "value"));
+    }
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutRequest.java b/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutRequest.java
index 9d0885c..abfaac8 100644
--- a/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutRequest.java
+++ b/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutRequest.java
@@ -17,7 +17,7 @@ public record CreateReaderCheckoutRequest(
      * Affiliate metadata for the transaction. It is a field that allow for integrators to track the
      * source of the transaction.
      */
-    com.sumup.sdk.models.Affiliate affiliate,
+    com.sumup.sdk.models.Affiliate2 affiliate,
 
     /**
      * The card type of the card used for the transaction. Is is required only for some countries
@@ -68,7 +68,7 @@ public static Builder builder() {
   /** Builder for CreateReaderCheckoutRequest instances. */
   public static final class Builder {
     private com.sumup.sdk.models.CreateReaderCheckoutRequestAade aade;
-    private com.sumup.sdk.models.Affiliate affiliate;
+    private com.sumup.sdk.models.Affiliate2 affiliate;
     private com.sumup.sdk.models.CreateReaderCheckoutRequestCardType cardType;
     private String description;
     private Long installments;
@@ -100,7 +100,7 @@ public Builder aade(com.sumup.sdk.models.CreateReaderCheckoutRequestAade aade) {
      *     integrators to track the source of the transaction.
      * @return This builder instance.
      */
-    public Builder affiliate(com.sumup.sdk.models.Affiliate affiliate) {
+    public Builder affiliate(com.sumup.sdk.models.Affiliate2 affiliate) {
       this.affiliate = affiliate;
       return this;
     }
diff --git a/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutResponseData.java b/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutResponseData.java
index b716ac2..017b63a 100644
--- a/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutResponseData.java
+++ b/src/main/java/com/sumup/sdk/models/CreateReaderCheckoutResponseData.java
@@ -4,6 +4,9 @@
 import java.util.Objects;
 
 public record CreateReaderCheckoutResponseData(
+    /** The checkout ID is a unique identifier for the checkout. */
+    String checkoutId,
+
     /**
      * The client transaction ID is a unique identifier for the transaction that is generated for
      * the client. It can be used later to fetch the transaction details via the [Transactions
@@ -21,10 +24,22 @@ public static Builder builder() {
 
   /** Builder for CreateReaderCheckoutResponseData instances. */
   public static final class Builder {
+    private String checkoutId;
     private String clientTransactionId;
 
     private Builder() {}
 
+    /**
+     * Sets the value for {@code checkoutId}.
+     *
+     * @param checkoutId The checkout ID is a unique identifier for the checkout.
+     * @return This builder instance.
+     */
+    public Builder checkoutId(String checkoutId) {
+      this.checkoutId = checkoutId;
+      return this;
+    }
+
     /**
      * Sets the value for {@code clientTransactionId}.
      *
@@ -46,7 +61,7 @@ public Builder clientTransactionId(String clientTransactionId) {
      */
     public CreateReaderCheckoutResponseData build() {
       return new CreateReaderCheckoutResponseData(
-          Objects.requireNonNull(clientTransactionId, "clientTransactionId"));
+          checkoutId, Objects.requireNonNull(clientTransactionId, "clientTransactionId"));
     }
   }
 }
diff --git a/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponse.java b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponse.java
new file mode 100644
index 0000000..ff179f1
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponse.java
@@ -0,0 +1,42 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import java.util.Objects;
+
+public record GetReaderCheckoutResponse(com.sumup.sdk.models.GetReaderCheckoutResponseData data) {
+  /**
+   * Creates a builder for GetReaderCheckoutResponse.
+   *
+   * @return Builder that constructs immutable GetReaderCheckoutResponse instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for GetReaderCheckoutResponse instances. */
+  public static final class Builder {
+    private com.sumup.sdk.models.GetReaderCheckoutResponseData data;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code data}.
+     *
+     * @param data Value for the data field.
+     * @return This builder instance.
+     */
+    public Builder data(com.sumup.sdk.models.GetReaderCheckoutResponseData data) {
+      this.data = data;
+      return this;
+    }
+
+    /**
+     * Builds an immutable GetReaderCheckoutResponse instance.
+     *
+     * @return Immutable GetReaderCheckoutResponse.
+     */
+    public GetReaderCheckoutResponse build() {
+      return new GetReaderCheckoutResponse(Objects.requireNonNull(data, "data"));
+    }
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseData.java b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseData.java
new file mode 100644
index 0000000..628c8ae
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseData.java
@@ -0,0 +1,262 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import java.util.Objects;
+
+public record GetReaderCheckoutResponseData(
+    /** Type of the card. Required for some countries */
+    com.sumup.sdk.models.GetReaderCheckoutResponseDataCardType cardType,
+
+    /** Unique identifier for the checkout */
+    java.util.UUID checkoutId,
+
+    /** Client transaction identifier associated with the checkout */
+    String clientTransactionId,
+
+    /** Checkout creation timestamp */
+    java.time.OffsetDateTime createdAt,
+
+    /** Number of installments for the transaction. Required for some countries. */
+    Long installments,
+
+    /** Payment failure reason */
+    String paymentFailureReason,
+
+    /** Payment status from payments v2 event */
+    String paymentStatus,
+
+    /** Type of the payment. Required for some countries */
+    com.sumup.sdk.models.GetReaderCheckoutResponseDataPaymentType paymentType,
+
+    /** Reader firmware version */
+    String readerFirmwareVersion,
+
+    /** Device serial number */
+    String readerSerialNumber,
+
+    /** Current status of the checkout */
+    com.sumup.sdk.models.GetReaderCheckoutResponseDataStatus status,
+
+    /**
+     * Amount structure. The amount is represented as an integer value altogether with the currency
+     * and the minor unit. For example, EUR 1.00 is represented as value 100 with minor unit of 2.
+     */
+    com.sumup.sdk.models.Money2 totalAmount,
+
+    /** Checkout last update timestamp */
+    java.time.OffsetDateTime updatedAt,
+
+    /**
+     * Checkout expiration timestamp. After this time, the checkout will be automatically cancelled.
+     */
+    java.time.OffsetDateTime validUntil) {
+  /**
+   * Creates a builder for GetReaderCheckoutResponseData.
+   *
+   * @return Builder that constructs immutable GetReaderCheckoutResponseData instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for GetReaderCheckoutResponseData instances. */
+  public static final class Builder {
+    private com.sumup.sdk.models.GetReaderCheckoutResponseDataCardType cardType;
+    private java.util.UUID checkoutId;
+    private String clientTransactionId;
+    private java.time.OffsetDateTime createdAt;
+    private Long installments;
+    private String paymentFailureReason;
+    private String paymentStatus;
+    private com.sumup.sdk.models.GetReaderCheckoutResponseDataPaymentType paymentType;
+    private String readerFirmwareVersion;
+    private String readerSerialNumber;
+    private com.sumup.sdk.models.GetReaderCheckoutResponseDataStatus status;
+    private com.sumup.sdk.models.Money2 totalAmount;
+    private java.time.OffsetDateTime updatedAt;
+    private java.time.OffsetDateTime validUntil;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code cardType}.
+     *
+     * @param cardType Type of the card. Required for some countries
+     * @return This builder instance.
+     */
+    public Builder cardType(com.sumup.sdk.models.GetReaderCheckoutResponseDataCardType cardType) {
+      this.cardType = cardType;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code checkoutId}.
+     *
+     * @param checkoutId Unique identifier for the checkout
+     * @return This builder instance.
+     */
+    public Builder checkoutId(java.util.UUID checkoutId) {
+      this.checkoutId = checkoutId;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code clientTransactionId}.
+     *
+     * @param clientTransactionId Client transaction identifier associated with the checkout
+     * @return This builder instance.
+     */
+    public Builder clientTransactionId(String clientTransactionId) {
+      this.clientTransactionId = clientTransactionId;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code createdAt}.
+     *
+     * @param createdAt Checkout creation timestamp
+     * @return This builder instance.
+     */
+    public Builder createdAt(java.time.OffsetDateTime createdAt) {
+      this.createdAt = createdAt;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code installments}.
+     *
+     * @param installments Number of installments for the transaction. Required for some countries.
+     * @return This builder instance.
+     */
+    public Builder installments(Long installments) {
+      this.installments = installments;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code paymentFailureReason}.
+     *
+     * @param paymentFailureReason Payment failure reason
+     * @return This builder instance.
+     */
+    public Builder paymentFailureReason(String paymentFailureReason) {
+      this.paymentFailureReason = paymentFailureReason;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code paymentStatus}.
+     *
+     * @param paymentStatus Payment status from payments v2 event
+     * @return This builder instance.
+     */
+    public Builder paymentStatus(String paymentStatus) {
+      this.paymentStatus = paymentStatus;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code paymentType}.
+     *
+     * @param paymentType Type of the payment. Required for some countries
+     * @return This builder instance.
+     */
+    public Builder paymentType(
+        com.sumup.sdk.models.GetReaderCheckoutResponseDataPaymentType paymentType) {
+      this.paymentType = paymentType;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code readerFirmwareVersion}.
+     *
+     * @param readerFirmwareVersion Reader firmware version
+     * @return This builder instance.
+     */
+    public Builder readerFirmwareVersion(String readerFirmwareVersion) {
+      this.readerFirmwareVersion = readerFirmwareVersion;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code readerSerialNumber}.
+     *
+     * @param readerSerialNumber Device serial number
+     * @return This builder instance.
+     */
+    public Builder readerSerialNumber(String readerSerialNumber) {
+      this.readerSerialNumber = readerSerialNumber;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code status}.
+     *
+     * @param status Current status of the checkout
+     * @return This builder instance.
+     */
+    public Builder status(com.sumup.sdk.models.GetReaderCheckoutResponseDataStatus status) {
+      this.status = status;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code totalAmount}.
+     *
+     * @param totalAmount Amount structure. The amount is represented as an integer value altogether
+     *     with the currency and the minor unit. For example, EUR 1.00 is represented as value 100
+     *     with minor unit of 2.
+     * @return This builder instance.
+     */
+    public Builder totalAmount(com.sumup.sdk.models.Money2 totalAmount) {
+      this.totalAmount = totalAmount;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code updatedAt}.
+     *
+     * @param updatedAt Checkout last update timestamp
+     * @return This builder instance.
+     */
+    public Builder updatedAt(java.time.OffsetDateTime updatedAt) {
+      this.updatedAt = updatedAt;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code validUntil}.
+     *
+     * @param validUntil Checkout expiration timestamp. After this time, the checkout will be
+     *     automatically cancelled.
+     * @return This builder instance.
+     */
+    public Builder validUntil(java.time.OffsetDateTime validUntil) {
+      this.validUntil = validUntil;
+      return this;
+    }
+
+    /**
+     * Builds an immutable GetReaderCheckoutResponseData instance.
+     *
+     * @return Immutable GetReaderCheckoutResponseData.
+     */
+    public GetReaderCheckoutResponseData build() {
+      return new GetReaderCheckoutResponseData(
+          Objects.requireNonNull(cardType, "cardType"),
+          Objects.requireNonNull(checkoutId, "checkoutId"),
+          Objects.requireNonNull(clientTransactionId, "clientTransactionId"),
+          Objects.requireNonNull(createdAt, "createdAt"),
+          Objects.requireNonNull(installments, "installments"),
+          paymentFailureReason,
+          Objects.requireNonNull(paymentStatus, "paymentStatus"),
+          Objects.requireNonNull(paymentType, "paymentType"),
+          Objects.requireNonNull(readerFirmwareVersion, "readerFirmwareVersion"),
+          Objects.requireNonNull(readerSerialNumber, "readerSerialNumber"),
+          Objects.requireNonNull(status, "status"),
+          Objects.requireNonNull(totalAmount, "totalAmount"),
+          Objects.requireNonNull(updatedAt, "updatedAt"),
+          Objects.requireNonNull(validUntil, "validUntil"));
+    }
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataCardType.java b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataCardType.java
new file mode 100644
index 0000000..4a8eb01
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataCardType.java
@@ -0,0 +1,57 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import java.util.Objects;
+
+/** Type of the card. Required for some countries */
+public final class GetReaderCheckoutResponseDataCardType {
+  public static final GetReaderCheckoutResponseDataCardType CREDIT =
+      new GetReaderCheckoutResponseDataCardType("credit");
+  public static final GetReaderCheckoutResponseDataCardType DEBIT =
+      new GetReaderCheckoutResponseDataCardType("debit");
+
+  private final String value;
+
+  private GetReaderCheckoutResponseDataCardType(String value) {
+    this.value = Objects.requireNonNull(value, "value");
+  }
+
+  /**
+   * Creates a GetReaderCheckoutResponseDataCardType for a value not yet known to this SDK version.
+   *
+   * @param value Wire value sent to or received from the API.
+   * @return Open enum value wrapping {@code value}.
+   */
+  public static GetReaderCheckoutResponseDataCardType of(String value) {
+    return new GetReaderCheckoutResponseDataCardType(value);
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return value;
+  }
+
+  @JsonCreator
+  public static GetReaderCheckoutResponseDataCardType fromValue(String value) {
+    return value == null ? null : new GetReaderCheckoutResponseDataCardType(value);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    return this == other
+        || (other instanceof GetReaderCheckoutResponseDataCardType that
+            && this.value.equals(that.value));
+  }
+
+  @Override
+  public int hashCode() {
+    return value.hashCode();
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataPaymentType.java b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataPaymentType.java
new file mode 100644
index 0000000..459ba1d
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataPaymentType.java
@@ -0,0 +1,58 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import java.util.Objects;
+
+/** Type of the payment. Required for some countries */
+public final class GetReaderCheckoutResponseDataPaymentType {
+  public static final GetReaderCheckoutResponseDataPaymentType CARD =
+      new GetReaderCheckoutResponseDataPaymentType("card");
+  public static final GetReaderCheckoutResponseDataPaymentType PIX =
+      new GetReaderCheckoutResponseDataPaymentType("pix");
+
+  private final String value;
+
+  private GetReaderCheckoutResponseDataPaymentType(String value) {
+    this.value = Objects.requireNonNull(value, "value");
+  }
+
+  /**
+   * Creates a GetReaderCheckoutResponseDataPaymentType for a value not yet known to this SDK
+   * version.
+   *
+   * @param value Wire value sent to or received from the API.
+   * @return Open enum value wrapping {@code value}.
+   */
+  public static GetReaderCheckoutResponseDataPaymentType of(String value) {
+    return new GetReaderCheckoutResponseDataPaymentType(value);
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return value;
+  }
+
+  @JsonCreator
+  public static GetReaderCheckoutResponseDataPaymentType fromValue(String value) {
+    return value == null ? null : new GetReaderCheckoutResponseDataPaymentType(value);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    return this == other
+        || (other instanceof GetReaderCheckoutResponseDataPaymentType that
+            && this.value.equals(that.value));
+  }
+
+  @Override
+  public int hashCode() {
+    return value.hashCode();
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataStatus.java b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataStatus.java
new file mode 100644
index 0000000..bcc0254
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/GetReaderCheckoutResponseDataStatus.java
@@ -0,0 +1,61 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import java.util.Objects;
+
+/** Current status of the checkout */
+public final class GetReaderCheckoutResponseDataStatus {
+  public static final GetReaderCheckoutResponseDataStatus PENDING =
+      new GetReaderCheckoutResponseDataStatus("pending");
+  public static final GetReaderCheckoutResponseDataStatus SUCCESSFUL =
+      new GetReaderCheckoutResponseDataStatus("successful");
+  public static final GetReaderCheckoutResponseDataStatus FAILED =
+      new GetReaderCheckoutResponseDataStatus("failed");
+  public static final GetReaderCheckoutResponseDataStatus CANCELLED =
+      new GetReaderCheckoutResponseDataStatus("cancelled");
+
+  private final String value;
+
+  private GetReaderCheckoutResponseDataStatus(String value) {
+    this.value = Objects.requireNonNull(value, "value");
+  }
+
+  /**
+   * Creates a GetReaderCheckoutResponseDataStatus for a value not yet known to this SDK version.
+   *
+   * @param value Wire value sent to or received from the API.
+   * @return Open enum value wrapping {@code value}.
+   */
+  public static GetReaderCheckoutResponseDataStatus of(String value) {
+    return new GetReaderCheckoutResponseDataStatus(value);
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return value;
+  }
+
+  @JsonCreator
+  public static GetReaderCheckoutResponseDataStatus fromValue(String value) {
+    return value == null ? null : new GetReaderCheckoutResponseDataStatus(value);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    return this == other
+        || (other instanceof GetReaderCheckoutResponseDataStatus that
+            && this.value.equals(that.value));
+  }
+
+  @Override
+  public int hashCode() {
+    return value.hashCode();
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/Money2.java b/src/main/java/com/sumup/sdk/models/Money2.java
new file mode 100644
index 0000000..09108fd
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/Money2.java
@@ -0,0 +1,85 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import java.util.Objects;
+
+/**
+ * Amount structure. The amount is represented as an integer value altogether with the currency and
+ * the minor unit. For example, EUR 1.00 is represented as value 100 with minor unit of 2.
+ */
+public record Money2(
+    /** Currency ISO 4217 code */
+    String currency,
+
+    /**
+     * The minor units of the currency. It represents the number of decimals of the currency. For
+     * the currencies CLP, COP and HUF, the minor unit is 0.
+     */
+    Long minorUnit,
+
+    /** Integer value of the amount. */
+    Long value) {
+  /**
+   * Creates a builder for Money2.
+   *
+   * @return Builder that constructs immutable Money2 instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for Money2 instances. */
+  public static final class Builder {
+    private String currency;
+    private Long minorUnit;
+    private Long value;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code currency}.
+     *
+     * @param currency Currency ISO 4217 code
+     * @return This builder instance.
+     */
+    public Builder currency(String currency) {
+      this.currency = currency;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code minorUnit}.
+     *
+     * @param minorUnit The minor units of the currency. It represents the number of decimals of the
+     *     currency. For the currencies CLP, COP and HUF, the minor unit is 0.
+     * @return This builder instance.
+     */
+    public Builder minorUnit(Long minorUnit) {
+      this.minorUnit = minorUnit;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code value}.
+     *
+     * @param value Integer value of the amount.
+     * @return This builder instance.
+     */
+    public Builder value(Long value) {
+      this.value = value;
+      return this;
+    }
+
+    /**
+     * Builds an immutable Money2 instance.
+     *
+     * @return Immutable Money2.
+     */
+    public Money2 build() {
+      return new Money2(
+          Objects.requireNonNull(currency, "currency"),
+          Objects.requireNonNull(minorUnit, "minorUnit"),
+          Objects.requireNonNull(value, "value"));
+    }
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/Reader.java b/src/main/java/com/sumup/sdk/models/Reader.java
index 8c11639..aa4b17d 100644
--- a/src/main/java/com/sumup/sdk/models/Reader.java
+++ b/src/main/java/com/sumup/sdk/models/Reader.java
@@ -11,12 +11,7 @@ public record Reader(
     /** Information about the underlying physical device. */
     com.sumup.sdk.models.ReaderDevice device,
 
-    /**
-     * Unique identifier of the object. Note that this identifies the instance of the physical
-     * devices pairing with your SumUp account. If you
-     * [delete](https://developer.sumup.com/api/readers/delete-reader) a reader, and pair the device
-     * again, the ID will be different. Do not use this ID to refer to a physical device.
-     */
+    /** Unique identifier of the reader that the payment is initiated on. */
     com.sumup.sdk.models.ReaderId id,
 
     /**
@@ -93,10 +88,7 @@ public Builder device(com.sumup.sdk.models.ReaderDevice device) {
     /**
      * Sets the value for {@code id}.
      *
-     * @param id Unique identifier of the object. Note that this identifies the instance of the
-     *     physical devices pairing with your SumUp account. If you
-     *     [delete](https://developer.sumup.com/api/readers/delete-reader) a reader, and pair the
-     *     device again, the ID will be different. Do not use this ID to refer to a physical device.
+     * @param id Unique identifier of the reader that the payment is initiated on.
      * @return This builder instance.
      */
     public Builder id(com.sumup.sdk.models.ReaderId id) {
diff --git a/src/main/java/com/sumup/sdk/models/ReaderId.java b/src/main/java/com/sumup/sdk/models/ReaderId.java
index bf329a8..6c65be8 100644
--- a/src/main/java/com/sumup/sdk/models/ReaderId.java
+++ b/src/main/java/com/sumup/sdk/models/ReaderId.java
@@ -1,10 +1,5 @@
 // Code generated by sumup-java/codegen. DO NOT EDIT.
 package com.sumup.sdk.models;
 
-/**
- * Unique identifier of the object. Note that this identifies the instance of the physical devices
- * pairing with your SumUp account. If you
- * [delete](https://developer.sumup.com/api/readers/delete-reader) a reader, and pair the device
- * again, the ID will be different. Do not use this ID to refer to a physical device.
- */
+/** Unique identifier of the reader that the payment is initiated on. */
 public record ReaderId(String value) {}
diff --git a/src/main/java/com/sumup/sdk/models/ReaderPaymentRequestParams.java b/src/main/java/com/sumup/sdk/models/ReaderPaymentRequestParams.java
new file mode 100644
index 0000000..ebdd030
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/ReaderPaymentRequestParams.java
@@ -0,0 +1,91 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+import java.util.Objects;
+
+public record ReaderPaymentRequestParams(
+    com.sumup.sdk.models.Affiliate affiliate,
+
+    /** Caller-supplied correlation identifier, used as the idempotency key. */
+    String clientTransactionId,
+
+    /** Optional tip amount in minor units, added on top of total_amount. */
+    Long tipAmount,
+    com.sumup.sdk.models.Amount totalAmount) {
+  /**
+   * Creates a builder for ReaderPaymentRequestParams.
+   *
+   * @return Builder that constructs immutable ReaderPaymentRequestParams instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for ReaderPaymentRequestParams instances. */
+  public static final class Builder {
+    private com.sumup.sdk.models.Affiliate affiliate;
+    private String clientTransactionId;
+    private Long tipAmount;
+    private com.sumup.sdk.models.Amount totalAmount;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code affiliate}.
+     *
+     * @param affiliate Value for the affiliate field.
+     * @return This builder instance.
+     */
+    public Builder affiliate(com.sumup.sdk.models.Affiliate affiliate) {
+      this.affiliate = affiliate;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code clientTransactionId}.
+     *
+     * @param clientTransactionId Caller-supplied correlation identifier, used as the idempotency
+     *     key.
+     * @return This builder instance.
+     */
+    public Builder clientTransactionId(String clientTransactionId) {
+      this.clientTransactionId = clientTransactionId;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code tipAmount}.
+     *
+     * @param tipAmount Optional tip amount in minor units, added on top of total_amount.
+     * @return This builder instance.
+     */
+    public Builder tipAmount(Long tipAmount) {
+      this.tipAmount = tipAmount;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code totalAmount}.
+     *
+     * @param totalAmount Value for the totalAmount field.
+     * @return This builder instance.
+     */
+    public Builder totalAmount(com.sumup.sdk.models.Amount totalAmount) {
+      this.totalAmount = totalAmount;
+      return this;
+    }
+
+    /**
+     * Builds an immutable ReaderPaymentRequestParams instance.
+     *
+     * @return Immutable ReaderPaymentRequestParams.
+     */
+    public ReaderPaymentRequestParams build() {
+      return new ReaderPaymentRequestParams(
+          affiliate,
+          Objects.requireNonNull(clientTransactionId, "clientTransactionId"),
+          tipAmount,
+          Objects.requireNonNull(totalAmount, "totalAmount"));
+    }
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/ReaderPaymentResponse.java b/src/main/java/com/sumup/sdk/models/ReaderPaymentResponse.java
new file mode 100644
index 0000000..cf3b8ea
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/ReaderPaymentResponse.java
@@ -0,0 +1,40 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+public record ReaderPaymentResponse(com.sumup.sdk.models.ReaderPaymentResponseData data) {
+  /**
+   * Creates a builder for ReaderPaymentResponse.
+   *
+   * @return Builder that constructs immutable ReaderPaymentResponse instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for ReaderPaymentResponse instances. */
+  public static final class Builder {
+    private com.sumup.sdk.models.ReaderPaymentResponseData data;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code data}.
+     *
+     * @param data Value for the data field.
+     * @return This builder instance.
+     */
+    public Builder data(com.sumup.sdk.models.ReaderPaymentResponseData data) {
+      this.data = data;
+      return this;
+    }
+
+    /**
+     * Builds an immutable ReaderPaymentResponse instance.
+     *
+     * @return Immutable ReaderPaymentResponse.
+     */
+    public ReaderPaymentResponse build() {
+      return new ReaderPaymentResponse(data);
+    }
+  }
+}
diff --git a/src/main/java/com/sumup/sdk/models/ReaderPaymentResponseData.java b/src/main/java/com/sumup/sdk/models/ReaderPaymentResponseData.java
new file mode 100644
index 0000000..c1b3692
--- /dev/null
+++ b/src/main/java/com/sumup/sdk/models/ReaderPaymentResponseData.java
@@ -0,0 +1,61 @@
+// Code generated by sumup-java/codegen. DO NOT EDIT.
+package com.sumup.sdk.models;
+
+public record ReaderPaymentResponseData(
+    /** Caller-supplied correlation identifier that was provided in the request. */
+    String clientTransactionId,
+
+    /**
+     * Transaction code returned by the acquirer/processing entity after processing the transaction.
+     */
+    String transactionCode) {
+  /**
+   * Creates a builder for ReaderPaymentResponseData.
+   *
+   * @return Builder that constructs immutable ReaderPaymentResponseData instances.
+   */
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  /** Builder for ReaderPaymentResponseData instances. */
+  public static final class Builder {
+    private String clientTransactionId;
+    private String transactionCode;
+
+    private Builder() {}
+
+    /**
+     * Sets the value for {@code clientTransactionId}.
+     *
+     * @param clientTransactionId Caller-supplied correlation identifier that was provided in the
+     *     request.
+     * @return This builder instance.
+     */
+    public Builder clientTransactionId(String clientTransactionId) {
+      this.clientTransactionId = clientTransactionId;
+      return this;
+    }
+
+    /**
+     * Sets the value for {@code transactionCode}.
+     *
+     * @param transactionCode Transaction code returned by the acquirer/processing entity after
+     *     processing the transaction.
+     * @return This builder instance.
+     */
+    public Builder transactionCode(String transactionCode) {
+      this.transactionCode = transactionCode;
+      return this;
+    }
+
+    /**
+     * Builds an immutable ReaderPaymentResponseData instance.
+     *
+     * @return Immutable ReaderPaymentResponseData.
+     */
+    public ReaderPaymentResponseData build() {
+      return new ReaderPaymentResponseData(clientTransactionId, transactionCode);
+    }
+  }
+}