# 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.

## 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](https://api.sirenic.eu/exemples/), 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

- `/v1/eu/entreprise/GB/{company_number}/comptes/{date_cloture}` — $0.05
- `/v1/eu/entreprise/GB/{company_number}/dirigeants` — $0.01
- `/v1/eu/entreprise/GB/{company_number}/beneficiaires-effectifs` — $0.02

## 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](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs) 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](https://api.sirenic.eu/openapi.json) and in [llms.txt](https://api.sirenic.eu/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

| Route | Price | What it returns |
| --- | --- | --- |
| `/v1/eu/entreprise/GB/{company_number}/comptes` | $0.01 | 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. |

## Take it further

- [See a real response (free)](https://api.sirenic.eu/exemples/eu-entreprise-GB-company_number-comptes.json)
- [Get the quote for /v1/eu/entreprise/GB/{company_number}/comptes](https://api.sirenic.eu/v1/eu/entreprise/GB/{company_number}/comptes)
- [Get notified about euro packs](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs)

## Read next

- [Querying European company registers](https://api.sirenic.eu/en/use-cases/european-company-data-thirteen-official-registers-one-schema)

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Volume figures on this page were measured in our database on 2026-08-19. They are dated snapshots, not live counters.

Full catalogue : https://api.sirenic.eu/