Companies House Rate Limits
The Companies House API enforces rate limits to ensure fair use and system stability. The Public Data API allows up to 600 requests per 5-minute window per API key. The Streaming API limits accounts to 2 concurrent connections. Exceeding either limit results in HTTP 429 responses. Applications that consistently bypass or attempt to circumvent rate limits may be banned without prior notice.
Companies House Rate Limits is the machine-readable rate-limit profile for Companies House on the APIs.io network, in the API Commons Rate Limits shape.
It captures 2 rate-limit definitions.
Limit state is signalled in the notes response header.
This profile was written by API Evangelist and has not been verified against a page the provider published; treat every limit as unconfirmed until a dated transcription replaces it.
Tagged areas include Companies, UK Government, Business Registration, Company Search, and Officers.
notes
generated.
Work with this as data
Every rate limit here is available over the APIs.io API and to AI agents over MCP.