UK Companies House API

Government · Operational · 30d uptime 100%

UK Companies House Data from the UK government

Trust signals

Pricing

FREE

Auth

OAUTH2

CORS

No

Rate limit

600 requests/5 minutes

Health

157ms

Trust score

83 (B)

Last checked Oct 17, 2026 · uptime 24h 100% / 7d 100% / 30d 100%

Strong candidate; weakest signal is CORS.

Links

Homepagewww.company-information.service.gov.uk
Documentationdeveloper.company-information.service.gov.uk
Base URLdeveloper.company-information.service.gov.uk/

Integration checklist

Auth is OAUTH2
No CORS — route calls through your backend.
Rate limit: 600 requests/5 minutes

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