A Companies House API designed for AI search and agents

Built for software teams, AI agent developers and data-product builders

• Turn plain-English company questions into bounded SIC, location, status, date and officer filters.
• Use the typed REST API and OpenAPI schema for products that need stable keys, quotas and request IDs.
• Connect assistants through 26 Streamable HTTP MCP tools with revocable agent tokens.
• Use x402 for explicit pay-per-call access when a wallet-enabled agent does not need a subscription.

Example searches and checks

• Find active AI companies incorporated in London during the last 30 days
• Check a company profile, officers, PSC ownership, filings, charges and insolvency in one workflow
• Let an agent discover a priced company-search route and settle a single x402 request

Use the web app, API or MCP

Start in the live company search, review all features, or use the TypeScript SDK, REST API and MCP tools.

Frequently asked questions

Does IncorpSignal replace the official Companies House register?

No. Companies House remains the authoritative public register. IncorpSignal adds bounded search, linking, monitoring and decision-support context with routes back to source records.

Can I try the workflow before subscribing?

Yes. A free account includes a daily search allowance. Paid plans add unlimited search, monitoring, enrichment and REST API access.

Can software and AI agents use the same data?

Yes. The developer interface at https://incorpsignal.com/developers documents the TypeScript SDK, REST API, 26 MCP tools and explicit x402 pay-per-call products.