agents.factstamp.dev

Live 402 challenge

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

{
  "note": "Pay per call in USDC on Base, or redeem a prepaid pack with `authorization: Bearer <code>`.",
  "tool": "check_vat",
  "error": "This path answers a GET/HEAD probe with its price rather than a refusal: the terms below are the ones a POST is charged against, at this same resource. Send POST to buy.",
  "packs": "https://agents.factstamp.dev/packs",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://agents.factstamp.dev/vat",
      "description": "An EU VAT number check — VAT validity, and the VAT registration behind it. Relevant wherever a VAT number is being relied on or cited: the check reads the official VIES service (European Commission), keyless, and returns valid, invalid or unknown — an outage is never reported as invalid — with the member state, the register's own request date, and the trader identity only where that member state discloses it. GB is out of scope after Brexit; XI (Northern Ireland) is covered. Not tax advice.",
      "maxAmountRequired": "50000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": "https://agents.factstamp.dev/vat",
  "discovery": "https://agents.factstamp.dev/.well-known/x402",
  "price_usd": 0.05,
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "vat_number": "6388047V",
            "country_code": "IE"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "application/json"
        },
        "output": {
          "type": "json",
          "example": {
            "tool": "check_vat",
            "check": {
              "isValid": true,
              "userError": "VALID",
              "vat_number": "6388047V"
            },
            "query": {
              "vat_number": "6388047V",
              "country_code": "IE"
            },
            "scope": "in_scope",
            "source": {
              "source": "VIES (European Commission)",
              "licence": "CC BY 4.0 (European Commission reuse policy, Decision 2011/833/EU)",
              "request_date": "2026-10-07T07:40:59.315Z",
              "member_state_code": "IE",
              "consultation_number": {
                "available": false
              }
            },
            "trader": {
              "name": "GOOGLE IRELAND LIMITED",
              "address": "3RD FLOOR, GORDON HOUSE, BARROW STREET, DUBLIN 4",
              "identity_disclosed": true
            },
            "country": {
              "code": "IE",
              "name": "Ireland",
              "in_vies": true
            },
            "receipt": {
              "alg": "Ed25519",
              "key_id": "2331751858f5e3b1"
            },
            "verdict": "valid",
            "coverage": {
              "complete": true,
              "consulted": [
                "vies"
              ],
              "not_consulted": []
            },
            "receipt_url": "https://factstamp.agentrails.workers.dev/r/c41e77b2aa90d613"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input",
          "output"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "body": {
                "type": "object"
              },
              "type": {
                "const": "http"
              },
              "method": {
                "const": "POST"
              },
              "bodyType": {
                "const": "application/json"
              }
            },
            "additionalProperties": true
          },
          "output": {
            "type": "object",
            "required": [
              "type",
              "example"
            ],
            "properties": {
              "type": {
                "const": "json"
              },
              "example": {
                "type": "object"
              }
            },
            "additionalProperties": true
          }
        },
        "additionalProperties": false
      }
    }
  },
  "x402Version": 2,
  "amount_base_units": "50000"
}

Accepts

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

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://agents.factstamp.dev/vat",
    "description": "An EU VAT number check — VAT validity, and the VAT registration behind it. Relevant wherever a VAT number is being relied on or cited: the check reads the official VIES service (European Commission),…",
    "maxAmountRequired": "50000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-10-18 05:01Z

Last indexed by Roundhouse

2026-10-18 18:45Z

Last enriched (probe, favicon, geo)

2026-10-18 19:15Z

x402 version

1

Max timeout

300s

Liveness probe

HTTP 402