German VAT Number Validator (SYNTHORA)

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x10800a5a5B9d72251566EC651E862A8b4B427dE0",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "mimeType": "application/json",
        "resource": "https://vat-validate.hergertsynthora.com/service",
        "description": "EU VAT number validation for agents: per-country format rules and check-digit algorithms (DE, ES, FR, IT, NL, PT, BE, AT, PL, SE...) executed offline — deterministic, no VIES dependency, instant JSON verdict with country and normalized number. $0.001 USDC via x402 on Base. SYNTHORA. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.",
        "maxAmountRequired": "1000",
        "maxTimeoutSeconds": 300
      }
    ],
    "freeTier": {
      "note": "send header X-WALLET: 0x<your Base address> for a free trial",
      "header": "X-WALLET",
      "callsPerWallet": 3
    },
    "resource": {
      "url": "https://vat-validate.hergertsynthora.com/service",
      "mimeType": "application/json",
      "description": "EU VAT number validation for agents: per-country format rules and check-digit algorithms (DE, ES, FR, IT, NL, PT, BE, AT, PL, SE...) executed offline — deterministic, no VIES dependency, instant JSON verdict with country and normalized number. $0.001 USDC via x402 on Base. SYNTHORA. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "vat": "DE811907980"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "niche": "vat-validate",
              "result": {
                "valid": true,
                "country": "DE",
                "normalized": "DE811907980",
                "checkdigit_ok": true
              },
              "provenance": {
                "url": "algorithmic:eu-vat-checkdigits",
                "source": "EU VAT Number Validator"
              }
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "vat"
                  ],
                  "properties": {
                    "vat": {
                      "type": "string",
                      "description": "vat"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "ok": {
                    "type": "boolean"
                  },
                  "type": "object",
                  "niche": {
                    "type": "string"
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]