Companies House API

UK company search, profiles, officers, persons with significant control and filings as JSON.

The API.SH Companies House API returns public UK register data as JSON. Search companies by name or number, run an advanced search by SIC code, status, type, address and incorporation dates, then read a company profile with accounts and confirmation statement dates, its officers, its persons with significant control and its filing history with links to filed documents.

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6 endpoints
from $1 / 1,000 calls
1,000 free credits / month
failed calls free

UK company advanced search

GET https://api.api.sh/companies-house/v1/advanced-search

{ "success": true }

1 credit · $1 per 1,000 calls

What you can build with the Companies House API

Company due diligence

Check a UK company's status, registered office, SIC codes and accounts dates before you trade with it.

/company /search

Lead generation by sector

Find new or active companies by SIC code, status, address and incorporation date range.

/advanced-search

Director and officer research

List a company's directors and secretaries with roles, appointment and resignation dates.

/officers

Ownership and KYC checks

Read persons with significant control, their nature of control and notified and ceased dates.

/pscs

Filing monitoring

Track a company's filings by category and open the filed documents.

/filings

Companies House data you get

Field names from real responses. Numbers come parsed, URLs absolute, dates in ISO 8601.

Companies House API endpoints and prices

Every Companies House endpoint costs 1 credit per call: credits are $1 per 1,000 on a monthly plan, $2 pay-as-you-go. Pricing

Search and discovery2

UK company advanced search /companies-house/v1/advanced-search	$1 · $2 PAYG 1 credit
UK company search /companies-house/v1/search	$1 · $2 PAYG 1 credit

Profiles and accounts4

UK company profile /companies-house/v1/company	$1 · $2 PAYG 1 credit
UK company filing history /companies-house/v1/filings	$1 · $2 PAYG 1 credit
UK company officers /companies-house/v1/officers	$1 · $2 PAYG 1 credit
Companies House persons with significant control /companies-house/v1/pscs	$1 · $2 PAYG 1 credit

Call the Companies House API

UK company advanced search: GET https://api.api.sh/companies-house/v1/advanced-search

curl "https://api.api.sh/companies-house/v1/advanced-search?name_includes=tesco" \
  -H "x-api-key: $APISH_KEY"

import os, requests

res = requests.get(
    "https://api.api.sh/companies-house/v1/advanced-search",
    params={"name_includes": "tesco"},
    headers={"x-api-key": os.environ["APISH_KEY"]},
    timeout=120,
)
res.raise_for_status()
data = res.json()

const url = new URL("https://api.api.sh/companies-house/v1/advanced-search");
url.searchParams.set("name_includes", "tesco");

const res = await fetch(url, { headers: { "x-api-key": process.env.APISH_KEY } });
if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);
const data = await res.json();

# Google Sheets (API.SH add-on)
=APISH("/companies-house/v1/advanced-search", "name_includes", "tesco")

# Zapier, Make, n8n (verified node): pick the API.SH app,
# choose "Companies House" and "UK company advanced search".

# AI agents (Claude, ChatGPT, Cursor): add the
# API.SH MCP server https://api.sh/mcp

Create a free accountConfirm your email and get 1,000 free credits every month. No card needed.
Create an API keyOne key works for all 483 platforms.
Send the requestJSON back in one call. Add output=csv or output=ndjson for files.

Why API.SH for Companies House data

Public data only: no Companies House login, cookies or account needed
One key and one response shape for Companies House and 482 other platforms
Built and maintained by API.SH, not third-party publishers
Pay per call; errors on our side cost nothing
Live status for every endpoint

API.SH vs the official Companies House API

Companies House has an official free REST API and a streaming API, and you register for an API key to use them. API.SH needs no Companies House key and returns search, profile, officers, PSC and filing data in the same JSON shape as every other platform, in one place alongside other sites.

Skip building and maintaining your own Companies House scraper or comparing RapidAPI and Apify listings: API.SH gives you one key, one JSON format and a fixed price per call.

Companies House API questions

What Companies House data can I get?+

Company search (/companies-house/v1/search), advanced search (/companies-house/v1/advanced-search), company profiles (/companies-house/v1/company), officers (/companies-house/v1/officers), persons with significant control (/companies-house/v1/pscs) and filing history (/companies-house/v1/filings).

How much does the Companies House API cost?+

Every Companies House endpoint costs 1 credit per call. On a monthly plan 1,000 credits cost $1 (Starter is $50/month for 50,000 credits). Pay-as-you-go is $2 per 1,000 credits, with top-ups from $15 that never expire.

Is there a free trial?+

Yes. Every account gets 1,000 free credits every month. That is 1,000 calls to /companies-house/v1/advanced-search at 1 credit each.

Is there an official Companies House API?+

Yes. Companies House runs an official free REST API and a streaming API, and you register for an API key. API.SH is separate and needs no Companies House key.

Do I need a Companies House account or login?+

No. API.SH reads the public register only, so you need no Companies House account or API key.

How do I get started?+

1. Sign up at api.sh. 2. Copy your API key. 3. Call /companies-house/v1/company with a company number such as 00445790. Request examples and every parameter are in the docs at https://api.sh/docs. You can also use the JS or Python SDK, Google Sheets, Zapier, Make, n8n or the MCP server at https://api.sh/mcp.

Is the Companies House API free?+

The official API is free of charge with a registered key. API.SH gives you 1,000 free credits every month with no Companies House key. That is 1,000 calls to /companies-house/v1/advanced-search at 1 credit each.

Can I look up directors?+

Yes. /companies-house/v1/officers lists directors, secretaries and other roles, active or resigned, with appointment dates.