API · x402

Company check (KYB): registry status, VAT number validation (VIES), LEI and directors o…

Company check (KYB): registry status, VAT number validation (VIES), LEI and directors of a company by name, SIREN or VAT number

by api.17711.xyz · discovered, not yet claimed by its owner · updated 2026-10-12

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Company check (KYB): registry status, VAT number validation (VIES), LEI and directors of a company by name, SIREN or VAT number

Tags: company-check · kyb · vat-validation · company-directors · lei-lookup · bazaar

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/35043.json for the price and payment options.
Pay. Call GET https://api.17711.xyz/registry/company-check-service/v1/company-check/verify_company. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.009 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Calls (30d): 1 · 1 unique payers (third-party data from the public x402 Bazaar)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.009	0x19824cf672f28fa63024731ebc7405aa3733e0ba	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x19824cf672f28fa63024731ebc7405aa3733e0ba",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "9000",
    "amountUsd": 0.009,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "age_seconds": {
          "description": "How old this answer is, in seconds (0 for a fresh check).",
          "format": "uint64",
          "minimum": 0,
          "type": "integer"
        },
        "company": {
          "$ref": "#/$defs/Company"
        },
        "confidence": {
          "description": "`high` (identified by a number), `medium` (a clear name match) or `low` (several similar names).",
          "type": "string"
        },
        "coverage_note": {
          "description": "What this answer does not cover for the company's country.",
          "type": "string"
        },
        "directors": {
          "description": "Officers and statutory auditors published in the register (France only).",
          "items": {
            "$ref": "#/$defs/Director"
          },
          "type": "array"
        },
        "financials": {
          "description": "Revenue and net result of the latest published years (France only).",
          "items": {
            "$ref": "#/$defs/Financial"
          },
          "type": "array"
        },
        "flags": {
          "description": "Things to know: closed company, invalid VAT number, name mismatch, lapsed LEI.",
          "items": {
            "$ref": "#/$defs/Flag"
          },
          "type": "array"
        },
        "from_cache": {
          "description": "`true` when this answer was served from a stored result.",
          "type": "boolean"
        },
        "lei": {
          "anyOf": [
            {
              "$ref": "#/$defs/LeiRecord"
            },
            {
              "type": "null"
            }
          ]
        },
        "matched_by": {
          "description": "How the company was identified: `lei`, `vat_number`, `registration_number` or `name`.",
          "type": "string"
        },
        "other_candidates": {
          "description": "Other companies that matched a name search (to disambiguate).",
          "items": {
            "$ref": "#/$defs/Candidate"
          },
          "type": "array"
        },
        "retrieved_at": {
          "description": "When the registers were queried (UTC).",
          "type": "string"
        },
        "sources": {
          "description": "The registers consulted.",
          "items": {
            "type": "string"
          },
          "type": "array"
        },
        "vat": {
          "anyOf": [
            {
              "$ref": "#/$defs/VatCheck"
            },
            {
              "type": "null"
            }
          ],
          "description": "VAT number validation, when a VAT number is known."
        }
      },
      "required": [
        "matched_by",
        "confidence",
        "company",
        "directors",
        "financials",
        "other_candidates",
        "flags",
        "sources",
        "coverage_note",
        "retrieved_at",
        "age_seconds",
        "from_cache"
      ],
      "title": "VerifyCompanyResponse",
      "type": "object"
    },
    "type": {
      "const": "json"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "age_seconds": 0,
    "company": null,
    "confidence": "string",
    "coverage_note": "string",
    "directors": [
      "value"
    ],
    "financials": [
      "value"
    ],
    "flags": [
      "value"
    ],
    "from_cache": true,
    "lei": null,
    "matched_by": "string",
    "other_candidates": [
      "value"
    ],
    "retrieved_at": "string",
    "sources": [
      "string"
    ],
    "vat": null
  },
  "type": null
}

Examples

curl

curl "https://api.17711.xyz/registry/company-check-service/v1/company-check/verify_company"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.17711.xyz/registry/company-check-service/v1/company-check/verify_company");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.17711.xyz/registry/company-check-service/v1/company-check/verify_company")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.17711.xyz
Endpoint: https://api.17711.xyz/registry/company-check-service/v1/company-check/verify_company
Machine-readable: /resources/35043.json