kyb-check-uk
One-call KYB for a UK company (company number or name): Companies House profile, officers and filing status, insolvency/liquidation flags, plus sanctions screening (US CSL/OFAC, EU, FR, UK) of the registered name, with a pass/review/fail verdict and flags.
Endpoint
GET|POST https://forge-tools.dentreprise.workers.dev/api/kyb-check-uk
Parameters
| Name | Required | Type | Description |
|---|---|---|---|
company_number | Optional | string | 8-char company number |
name | Optional | string | Name (alternative; best match is checked) |
Example request (unpaid — expect 402)
curl -sS -D - "https://forge-tools.dentreprise.workers.dev/api/kyb-check-uk?company_number=00445790"
Example 402 challenge
The same object is also sent as a base64 PAYMENT-REQUIRED header. Amounts are atomic USDC units (6 decimals).
{
"x402Version": 2,
"error": "Payment required",
"resource": {
"url": "https://forge-tools.dentreprise.workers.dev/api/kyb-check-uk",
"description": "One-call KYB for a UK company (company number or name): Companies House profile, officers and filing status, insolvency/liquidation flags, plus sanctions screening (US CSL/OFAC, EU, FR, UK) of the registered name, with a pass/review/fail verdict and flags.",
"mimeType": "application/json"
},
"accepts": [
{
"scheme": "exact",
"network": "eip155:8453",
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0x7B8bf45ac6AcbA6D4CFB626b57D3f5fF3C9C89F7",
"maxTimeoutSeconds": 120,
"extra": {
"name": "USD Coin",
"version": "2"
}
}
]
}Retry with payment
curl -sS "https://forge-tools.dentreprise.workers.dev/api/kyb-check-uk?company_number=00445790" \ -H "PAYMENT-SIGNATURE: $PAYMENT"
Example response
{
"verdict": "pass",
"flags": [],
"company": {
"name": "TESCO PLC",
"status": "active"
},
"sanctions": {
"match": false
}
}Related endpoints
lei-lookup
Legal Entity Identifier lookup from the official GLEIF register: by LEI (with ISO 17442 checksum check) or by legal-name search with optional country.
eori-validate
EORI number validation (customs trader ID) against the official European Commission EOS register, and UK GB numbers against HMRC.
siren-check
French SIREN (9) / SIRET (14) checksum validation (Luhn, La Poste exception), formatting, NIC, and the derived intra-EU VAT number.
sanctions-check
Sanctions screening of a person, company or vessel name against the US Consolidated Screening List (OFAC SDN with aliases plus other Treasury, Commerce BIS and State lists), the EU consolidated financial sanctions list (FSF), the French national asset-freeze register (DG Trésor) and the UK sanctions list (FCDO).