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UK Companies House API boundary

Official-source access, authentication, request-shaping, paging, freshness, legal, and interpretation boundaries for UK Companies House API.

version 1.0.0freshness currentobserved 2026-08-28T04:17:38Z

resource.public-data.companies-house-api
sha256:9af16ee92c12f09c6542caf317baa57405df77e8b236b62f07765c5edd43b0b1

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Evidence-backed facts

  1. The Companies House REST API exposes public company profiles, officers, filings, charges, insolvency, registers, persons with significant control, and related resources. informative
  2. API access requires a registered key or an applicable OAuth flow; credentials identify a client but do not grant broader company or filing authority. informative
  3. Clients must bind company number or search query, endpoint, start index, items per page, and returned pagination metadata and distinguish live REST from streaming contracts. informative
  4. Companies House makes filed information available but does not verify every filed fact; API data does not replace the current register, identity checks, due diligence, or legal advice. informative