# British accounts for a specific year

The detail of a British year. One register quirk to keep in mind: a company may change its accounting reference date, so two consecutive years do not always cover twelve months. Comparing two years without looking at their boundaries manufactures imaginary growth.

## What the route returns

Catalogue description, exactly as agents read it:

**One United Kingdom financial year from the iXBRL financial statements filed at Companies House: balance sheet (fixed and current assets, stocks, debtors, cash, creditors split by maturity, provisions, net assets, equity), average employees, the profit and loss when filed (turnover, operating, pre-tax and net result — most small companies file a balance sheet only), plus prior-year comparatives as published. Filing currency, null = not published, never zero. Open Government Licence v3.0.**

## Expected identifier

Company number, then the `date_cloture` returned by the listing.

> ⚠️ 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": "07960839",
 "date_cloture": "2026-03-31",
 "exercice": {
  "date_cloture": "2026-03-31",
  "denomination": "National Consortium For Examination Results CIC",
  "devise": "GBP",
  "referentiel": "SmallEntities",
  "chiffre_affaires": 2257340,
  "resultat_exploitation": 144109,
  "resultat_net": 141386,
  "dettes_non_ventilees": 200582,
  "dettes_moins_un_an": null,
  "stocks": null,
  "exercice_precedent": {
   "chiffre_affaires": 1941115,
   "resultat_net": -45647
  }
 },
 "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)"
}
```

## Price and billing

Price: **$0.05**. 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/{date_cloture}

# 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/{date_cloture}

# 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` — $0.01

## 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/{date_cloture}` | $0.05 | One United Kingdom financial year from the iXBRL financial statements filed at Companies House: balance sheet (fixed and current assets, stocks, debtors, cash, creditors split by maturity, provisions, net assets, equity), average employees, the profit and loss when filed (turnover, operating, pre-tax and net result — most small companies file a balance sheet only), plus prior-year comparatives as published. Filing currency, null = not published, never zero. Open Government Licence v3.0. |

## Take it further

- [See a real response (free)](https://api.sirenic.eu/exemples/eu-entreprise-GB-company_number-comptes-date_cloture.json)
- [Get the quote for /v1/eu/entreprise/GB/{company_number}/comptes/{date_cloture}](https://api.sirenic.eu/v1/eu/entreprise/GB/{company_number}/comptes/{date_cloture})
- [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)

---

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/