British annual accounts

840,922 rows of British accounts are in the database. The United Kingdom is the most open register in our coverage — filings, officers, controllers and insolvency are all public there, which makes it the country where full due diligence is easiest.

See a real response (free) Get the quote for /v1/eu/entreprise/GB/{company_number}/comptes

What the route returns

Catalogue description, exactly as agents read it:

UK annual accounts filings list — financial statements from iXBRL in the official Companies House Accounts Data Product (Open Government Licence v3.0). Query: /v1/eu/entreprise/GB/00095407/comptes (8-character company number, leading zeros included, SC/NI/OC prefixes supported). Every decoded balance sheet date with period, entity name, currency, accounting framework (micro-entity, FRS 102...) and accounts type. Electronically filed accounts only — absence does not mean no accounts exist.

Expected identifier

British company number (8 characters, digits or alphabetic prefix).

A wrongly formatted identifier returns 400 and is not billed — but it costs you a round trip. It is the leading cause of failed calls on the foreign routes.

Extract from a genuinely paid response

Dated snapshot from 2026-07-29, truncated to one item per array. It is not live data. The full extract is served free of charge from the samples surface, and the schema from the OpenAPI document.

{
 "pays": "GB",
 "id_national": "00095407",
 "nombre_depots": 1,
 "depots": [
  {
   "date_cloture": "2025-12-31",
   "debut_exercice": "2025-01-01",
   "denomination": "COSSART,GORDON AND CO.LIMITED",
   "devise": "GBP",
   "referentiel": "Micro-entities",
   "type_comptes": "FullAccounts",
   "nb_postes_decodes": 14,
   "nb_postes_courant": 7
  }
 ],
 "telechargement": "GET /v1/eu/entreprise/GB/{company_number}/comptes/{date_cloture}",
 "source": "Companies House — Free Accounts Data Product (download.companieshouse.gov.uk)",
 "licence": "Contains public sector information licensed under the Open Government Licence v3.0 (Companies House)",
 "disclaimer": "Postes décodés des comptes annuels déposés en iXBRL à Companies House"
}

Price and billing

Price: $0.01. The authoritative amount is the one in the 402 quote returned by the route itself — not this text, which derives from the same grid but is still just a page.

An error response cancels the payment: a 400, 404 or 503 is never billed. An upstream outage closes the route with a 503 rather than serving a degraded response.

Calling the route

# 1. Le devis, sans rien payer : la route répond 402 avec son montant
curl -i https://api.sirenic.eu/v1/eu/entreprise/GB/{company_number}/comptes

# 2. L'appel réglé — le client x402 paie le devis et rejoue la requête
npx x402-fetch https://api.sirenic.eu/v1/eu/entreprise/GB/{company_number}/comptes

# 3. Ou en MCP, dans Claude Code / Cursor / un agent
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

Neighbouring routes

How you pay

Every route is paid per call, in USDC or EURC on the Base network, over the x402 protocol: no account to create, no API key, no subscription. The first call returns a 402 quote your client settles, then replays the call. A failed call is never billed.

Would you rather have a euro invoice and prepaid credits? That is in preparation, and we will not announce a date until it is open. Write to contact@sirenic.eu and we will let you know when it opens.

Paid responses are Ed25519-signed: you can later prove what was served to you, and when. The whole catalogue is free to read in the OpenAPI document and in llms.txt.

One call, end to end

# Client x402 (npm) — le devis 402 est réglé et l'appel rejoué automatiquement
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534

# Ou en MCP, dans Claude Code / Cursor
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

Routes used and pricing

RoutePriceWhat it returns
/v1/eu/entreprise/GB/{company_number}/comptes (free sample)$0.01UK annual accounts filings list — financial statements from iXBRL in the official Companies House Accounts Data Product (Open Government Licence v3.0). Query: /v1/eu/entreprise/GB/00095407/comptes (8-character company number, leading zeros included, SC/NI/OC prefixes supported). Every decoded balance sheet date with period, entity name, currency, accounting framework (micro-entity, FRS 102...) and accounts type. Electronically filed accounts only — absence does not mean no accounts exist.

Take it further

No account to create, no key to request: the first step is free and shows you exactly what you would be buying.

See a real response (free) Get the quote for /v1/eu/entreprise/GB/{company_number}/comptes Get notified about euro packs

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