Write a normal question
Use a sector, SIC code, city, incorporation window, company status, director or founder pattern.
Search questions, not just company names
Sector + date + place
New AI companies in London
Find active companies mapped to AI and software SIC families, then rank the cohort.
SIC + location + statusActive software companies in Bristol
Combine business activity, registered-office location and company status.
Officer graphRepeat founders starting again
Move beyond a name lookup with current and historic appointment evidence.
ComplianceCompanies with filing risk
Surface overdue accounts, confirmation statements and public strike-off signals.
From the official register to a decision-ready list
Review ranked evidence
See why a company ranked, inspect officers and filings, and follow the source link back to Companies House.
Keep the useful cohort
Save companies, create alerts, export through the API or connect an agent through MCP.
Companies House company search by director, SIC code and incorporation date
Use IncorpSignal as an AI Companies House search engine for precise UK company research. Search Companies House by director or officer name, combine a five-digit SIC code with a town or region, find companies incorporated between specific dates, and narrow results to active, dissolved, or strike-off company status.
Built on the official UK register, ranked for decisions
Companies House remains the authoritative public register. IncorpSignal adds AI-assisted query parsing, founder graph analysis, ranking, risk signals, trend clustering, exports, and alerts so teams can move from a single-company lookup to a useful research list.
Use the same intelligence in your software or AI agent
For assistants and agents
Connect through Streamable HTTP with a revocable token and call 26 typed Companies House-backed tools.
Read the MCP guideFor explicit pay-per-call access
Let a wallet-enabled agent discover the price, settle one request and receive bounded JSON without a subscription.
Inspect the live catalogFor product integrations
Use API keys, OpenAPI, rate-limit headers and the TypeScript SDK for stable application workflows.
Open developer documentationExplore related Companies House searches
Frequently asked questions
What is Companies House AI search?
Companies House AI search lets you describe a UK company cohort in plain English. IncorpSignal turns the request into bounded Companies House filters and returns ranked company results with source links.
Can I search Companies House in plain English?
Yes. Ask for a sector, place, date range, company status, SIC code, director, or founder pattern. Structured operators such as sic:62012 and person: Jane Smith are also supported.
Does IncorpSignal use live Companies House data?
IncorpSignal uses the official Companies House public API for live company profiles and combines it with cached incorporation, officer, filing, SIC, risk, and trend intelligence.
Is there a Companies House MCP server for AI agents?
Yes. IncorpSignal exposes a stateless Streamable HTTP MCP endpoint at https://incorpsignal.com/mcp/ plus REST and x402 interfaces. Agent setup and tool documentation are available on the developer page.
Can I search for new UK companies and repeat founders?
Yes. IncorpSignal can filter recent incorporations, rank repeat-founder signals, map officer appointment graphs, and surface filing or compliance risk for investors, recruiters, sales teams, accountants, and advisers.
Can I search Companies House by director, SIC code, or incorporation date?
Yes. IncorpSignal supports director and officer names, five-digit UK SIC codes, locations, company status, and bounded incorporation-date searches, including combinations written in plain English.
Is Companies House AI search free?
Yes. IncorpSignal has a free account with a daily search allowance. Paid plans add unlimited search, alerts, trend intelligence, AI enrichment, and API access.