Validate VAT number

Name: Validate VAT number
Price: 0.002 USDC
Availability: InStock

Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.

OtherLiveeip155:8453Exactvia facilitator:payAI

https://api.gadgethumans.com/vat-validate

Vat validatorValidate vatVat number checkVat numberEu vat

Settlements · 30d

121↑ 167%

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.

$0.28

Verified settled volume

121 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0020

Listed price

As published in the catalog. Always read the live 402 before paying.

—

Calls · 30d

Upstream's own call count for this endpoint, not ours.

—

Unique payers · 30d

Never called

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xe6C34b8E58c8BEA609415f4D0C1Ce01Da48F3A34

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Machine traffic: pay $0.002 per request with x402",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xe6C34b8E58c8BEA609415f4D0C1Ce01Da48F3A34",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.gadgethumans.com/vat-validate",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "method": "GET",
              "queryParams": {
                "vat": "IE6388047V"
              },
              "discoverable": true
            },
            "output": {
              "type": "json",
              "schema": {
                "type": "object",
                "properties": {
                  "ok": {
                    "type": "boolean"
                  }
                }
              },
              "example": {
                "ok": true
              }
            }
          },
          "schema": {
            "type": "object",
            "properties": {
              "input": {
                "type": "object",
                "properties": {
                  "queryParams": {
                    "type": "object",
                    "required": [
                      "vat"
                    ],
                    "properties": {
                      "vat": {
                        "type": "string",
                        "description": "VAT number to validate"
                      }
                    }
                  }
                }
              },
              "output": {
                "type": "object",
                "properties": {
                  "example": {
                    "ok": true
                  }
                }
              }
            }
          }
        }
      },
      "description": "Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "type": "object",
            "required": [
              "vat"
            ],
            "properties": {
              "vat": {
                "type": "string",
                "description": "VAT number to validate"
              }
            }
          },
          "discoverable": true
        },
        "output": {
          "type": "json",
          "schema": {
            "type": "object",
            "properties": {
              "ok": {
                "type": "boolean"
              }
            }
          },
          "example": {
            "ok": true
          }
        }
      },
      "maxAmountRequired": "2000",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "7RDNyur52XauoJhwWnkvYjxygUoUv3ZPiosv8Ek5Suau",
      "amount": "2000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "mimeType": "application/json",
      "resource": "https://api.gadgethumans.com/vat-validate",
      "description": "Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.",
      "maxTimeoutSeconds": 300
    }
  ],
  "by_card": {
    "note": "Stripe checkout, no wallet required. The key is emailed and credits do not expire. Use this if you have no USDC.",
    "mcp_pro": {
      "per": "month",
      "url": "https://api.gadgethumans.com/subscribe?tier=mcp-pro",
      "usd": 2.99
    },
    "pack_500": {
      "url": "https://api.gadgethumans.com/buy-credits?pack=500",
      "usd": 5,
      "credits": 500
    },
    "pack_2500": {
      "url": "https://api.gadgethumans.com/buy-credits?pack=2500",
      "usd": 20,
      "credits": 2500
    },
    "week_pass": {
      "per": "week",
      "url": "https://api.gadgethumans.com/subscribe?tier=weekly",
      "usd": 1
    },
    "monthly_1500": {
      "url": "https://api.gadgethumans.com/buy-credits?pack=monthly-1500",
      "usd": 15,
      "credits_per_month": 1500
    }
  },
  "resource": {
    "url": "https://api.gadgethumans.com/vat-validate",
    "tags": [
      "vat validator",
      "validate vat",
      "vat number check",
      "vat number",
      "eu vat"
    ],
    "iconUrl": "https://api.gadgethumans.com/favicon.ico",
    "mimeType": "application/json",
    "description": "Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.",
    "serviceName": "Validate VAT number"
  },
  "free_tier": "Free tier: 100 requests/day per IP on the REST door (browser traffic), 5 calls/day per IP on the MCP door, then HTTP 402 with an x402 price. Pro: $2.99/mo — 500 calls/day.",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "vat": "IE6388047V"
          },
          "discoverable": true
        },
        "output": {
          "type": "json",
          "example": {
            "ok": true
          }
        }
      },
      "schema": {
        "type": "object",
        "properties": {
          "input": {
            "type": "object",
            "properties": {
              "queryParams": {
                "type": "object",
                "required": [
                  "vat"
                ],
                "properties": {
                  "vat": {
                    "type": "string",
                    "description": "VAT number to validate"
                  }
                }
              }
            }
          },
          "output": {
            "type": "object",
            "properties": {
              "example": {
                "ok": true
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2,
  "bulk_credits": {
    "pro": {
      "url": "https://api.gadgethumans.com/credits/buy/pro",
      "usdc": 25,
      "credits": 2750
    },
    "desk": {
      "url": "https://api.gadgethumans.com/credits/buy/desk",
      "usdc": 100,
      "credits": 12000
    },
    "note": "1 credit = $0.01. Pay a pack URL with x402 and the response returns an api_key you send as x-api-key on priced routes; calls then deduct credits instead of settling a payment each time.",
    "micro": {
      "url": "https://api.gadgethumans.com/credits/buy/micro",
      "usdc": 1,
      "credits": 100
    },
    "starter": {
      "url": "https://api.gadgethumans.com/credits/buy/starter",
      "usdc": 5,
      "credits": 500
    },
    "offer_url": "https://api.gadgethumans.com/credits"
  },
  "instructions": "Tool: Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.. Price: $0.002 USDC. Pay via x402: network eip155:8453, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, payTo 0xe6C34b8E58c8BEA609415f4D0C1Ce01Da48F3A34, facilitator https://facilitator.payai.network. Return payment in 'X-PAYMENT' header. Catalogue: https://api.gadgethumans.com/.well-known/x402"
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.002USDC≈ $0.002 USD

on Base · exact scheme

Pay 0.002 USDC on Base to 0xe6C3…F3A34. The signed payment is good for 5 minutes.

Paid to: 0xe6C3…F3A34
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 2000 smallest units
Buys: Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.
Returns: application/json

2000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 7RDNyu…5Suau
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes
Buys: Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.
Returns: application/json

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xe6C34b8E58c8BEA609415f4D0C1Ce01Da48F3A34",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.gadgethumans.com/vat-validate",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "vat": "IE6388047V"
            },
            "discoverable": true
          },
          "output": {
            "type": "json",
            "schema": {
              "type": "object",
              "properties": {
                "ok": {
                  "type": "boolean"
                }
              }
            },
            "example": {
              "ok": true
            }
          }
        },
        "schema": {
          "type": "object",
          "properties": {
            "input": {
              "type": "object",
              "properties": {
                "queryParams": {
                  "type": "object",
                  "required": [
                    "vat"
                  ],
                  "properties": {
                    "vat": {
                      "type": "string",
                      "description": "VAT number to validate"
                    }
                  }
                }
              }
            },
            "output": {
              "type": "object",
              "properties": {
                "example": {
                  "ok": true
                }
              }
            }
          }
        }
      }
    },
    "description": "Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.",
    "outputSchema": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "type": "object",
          "required": [
            "vat"
          ],
          "properties": {
            "vat": {
              "type": "string",
              "description": "VAT number to validate"
            }
          }
        },
        "discoverable": true
      },
      "output": {
        "type": "json",
        "schema": {
          "type": "object",
          "properties": {
            "ok": {
              "type": "boolean"
            }
          }
        },
        "example": {
          "ok": true
        }
      }
    },
    "maxAmountRequired": "2000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
    },
    "payTo": "7RDNyur52XauoJhwWnkvYjxygUoUv3ZPiosv8Ek5Suau",
    "amount": "2000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://api.gadgethumans.com/vat-validate",
    "description": "Validate an EU or UK VAT number format and checksum and return the country and normalised form. Pure CPU, instant.",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "vat": "IE6388047V"
        },
        "discoverable": true
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true
        }
      }
    },
    "schema": {
      "type": "object",
      "properties": {
        "input": {
          "type": "object",
          "properties": {
            "queryParams": {
              "type": "object",
              "required": [
                "vat"
              ],
              "properties": {
                "vat": {
                  "type": "string",
                  "description": "VAT number to validate"
                }
              }
            }
          }
        },
        "output": {
          "type": "object",
          "properties": {
            "example": {
              "ok": true
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-11-07 23:29Z
Last indexed by Roundhouse: 2026-11-08 09:15Z
Last enriched (probe, favicon, geo): 2026-11-03 02:46Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service Validate VAT number and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Validate%20VAT%20number'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.gadgethumans.com/vat-validate, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.