Companies House APIs, streams and filing schemas

Source universe · Acquisition routes

Official implementation · Official API · Public

Published by Companies House. Jurisdiction: UK.

What it covers

• company data
• PSC data
• filing history
• document API
• streaming API
• filing schemas

Publication and history

Read, stream, document, sandbox and filing routes have distinct authentication and product lifecycles.

Public register APIs expose current records and filing history; bulk and stream products have separate retention and access characteristics.

Review cadence: Daily. Reliability: Official publisher.

Acquisition and rights

• Acquisition: Official API

• Licence: Open Government Licence v3.0

• Commercial reuse: Permitted with attribution

• Raw storage: Permitted

• Derived assertions: Permitted

• Public use: Attributed derived content

• Visibility: Public

Keep public read, stream, document and OAuth filing routes separate; respect 600 requests per five minutes and secure API keys.

Contains public sector information licensed under the Open Government Licence v3.0; credited third-party material remains excluded.

Evidence for this decision

• Companies House developer guidelines — Access evidence, reviewed 11 September 2026.
• Companies House authentication — Access evidence, reviewed 11 September 2026.
• Reuse GOV.UK content — Licence evidence, reviewed 11 September 2026.

Source registry: sterling-source-registry@2026-09-11.5. Last reviewed 11 September 2026.