{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://pay.google.com/gp/p/ucp/2026-01-23/schemas/config.json",
  "title": "Google Pay Payment Handler Configuration",
  "description": "Configuration schema for the com.google.pay payment handler.",
  "type": "object",
  "required": [
    "api_version",
    "api_version_minor",
    "environment",
    "merchant_info",
    "allowed_payment_methods"
  ],
  "properties": {
    "api_version": {
      "type": "integer",
      "const": 2,
      "description": "The major Google Pay API version. Currently, this must be 2."
    },
    "api_version_minor": {
      "type": "integer",
      "const": 0,
      "description": "The minor Google Pay API version. Currently, this must be 0."
    },
    "environment": {
      "type": "string",
      "enum": [
        "TEST",
        "PRODUCTION"
      ],
      "description": "The Google Pay environment."
    },
    "merchant_info": {
      "description": "Identity details for the merchant as required by the Google Pay UCP handler.",
      "type": "object",
      "required": [
        "merchant_id"
      ],
      "properties": {
        "merchant_name": {
          "type": "string",
          "description": "The user-facing name of the merchant that will appear on the Google Pay payment sheet."
        },
        "merchant_id": {
          "type": "string",
          "description": "The Google Pay Merchant ID. Use a dummy value or 'TEST' for the TEST environment as configured in the handler configuration; use the real Merchant ID for PRODUCTION.",
          "pattern": "^[0-9a-zA-Z]+$"
        },
        "merchant_origin": {
          "type": "string",
          "description": "The fully qualified domain name where the checkout occurs, used for origin validation.",
          "format": "hostname"
        },
        "auth_jwt": {
          "type": "string",
          "description": "An optional authorization JWT for certain integration contexts."
        }
      }
    },
    "allowed_payment_methods": {
      "type": "array",
      "items": {
        "description": "Configuration options for an allowed payment method and its tokenization or processing specifications.",
        "type": "object",
        "required": [
          "type",
          "parameters",
          "tokenization_specification"
        ],
        "properties": {
          "type": {
            "type": "string",
            "enum": [
              "CARD"
            ],
            "description": "An identifier for the type of supported payment method. CARD is the only supported value."
          },
          "parameters": {
            "type": "object",
            "description": "Parameters required to configure the provided payment method type. For the CARD type use CardParameters.",
            "additionalProperties": false,
            "required": [
              "allowed_auth_methods",
              "allowed_card_networks"
            ],
            "properties": {
              "allowed_auth_methods": {
                "type": "array",
                "description": "Fields supported to authenticate a card transaction. PAN_ONLY returns PAN and expiration for cards on file with the user's Google Account.",
                "items": {
                  "type": "string",
                  "enum": [
                    "PAN_ONLY"
                  ]
                }
              },
              "allowed_card_networks": {
                "type": "array",
                "description": "The card networks supported by the merchant and the Google Pay API.",
                "items": {
                  "type": "string",
                  "enum": [
                    "AMEX",
                    "DISCOVER",
                    "ELECTRON",
                    "ELO",
                    "ELO_DEBIT",
                    "INTERAC",
                    "JCB",
                    "MAESTRO",
                    "MASTERCARD",
                    "VISA"
                  ]
                }
              },
              "allow_prepaid_cards": {
                "type": "boolean",
                "description": "Set to false if you don't support prepaid cards. Default is true."
              },
              "allow_credit_cards": {
                "type": "boolean",
                "description": "Set to false if you don't support credit cards. Default is true."
              },
              "assurance_details_required": {
                "type": "boolean",
                "description": "Set to true to request assurance details."
              },
              "billing_address_required": {
                "type": "boolean",
                "description": "Set to true if you require a billing address."
              },
              "billing_address_parameters": {
                "type": "object",
                "description": "The expected fields returned if billing_address_required is set to true.",
                "additionalProperties": false,
                "properties": {
                  "format": {
                    "type": "string",
                    "description": "Billing address format required to complete the transaction.",
                    "enum": [
                      "MIN",
                      "FULL",
                      "FULL-ISO3166"
                    ]
                  },
                  "phone_number_required": {
                    "type": "boolean",
                    "description": "Set to true if a phone number is required to process the transaction."
                  }
                }
              }
            }
          },
          "tokenization_specification": {
            "description": "Configure an account or decryption provider to receive payment information. This property is required for the CARD payment method.",
            "type": "object",
            "required": [
              "type",
              "parameters"
            ],
            "properties": {
              "type": {
                "type": "string",
                "enum": [
                  "DIRECT",
                  "PAYMENT_GATEWAY"
                ],
                "description": "A payment method tokenization type is supported for the given PaymentMethod. For the CARD payment method, use PAYMENT_GATEWAY or DIRECT."
              },
              "parameters": {
                "type": "object",
                "description": "Parameters specific to the selected payment method tokenization type."
              }
            }
          }
        }
      },
      "description": "The payment methods allowed for this transaction."
    }
  },
  "examples": [
    {
      "api_version": 2,
      "api_version_minor": 0,
      "environment": "PRODUCTION",
      "merchant_info": {
        "merchant_id": "348159138575927391",
        "merchant_name": "Test Business"
      },
      "allowed_payment_methods": [
        {
          "type": "CARD",
          "parameters": {
            "billing_address_required": true,
            "billing_address_parameters": {
              "phone_number_required": false,
              "format": "FULL"
            },
            "allowed_card_networks": [
              "VISA",
              "MASTERCARD",
              "AMEX",
              "DISCOVER",
              "INTERAC"
            ],
            "allowed_auth_methods": [
              "PAN_ONLY"
            ],
            "allow_prepaid_cards": true,
            "assurance_details_required": false,
            "allow_credit_cards": true
          },
          "tokenization_specification": {
            "type": "PAYMENT_GATEWAY",
            "parameters": {
              "gateway": "example_gateway",
              "gatewayMerchantId": "example_gateway_merchant_id"
            }
          }
        }
      ]
    }
  ]
}