Companies House MCP

npm install -g companies-house-cli ch config set-key your-key-here ch report 00445790

Find a company—search_companies/ch searchby name, with filters for status, type, incorporation date, location and SIC code.search_officers/ch search-officersfinds people across the whole register.

Read its record—get_company_profile/ch profilefor status, addresses, SIC codes and filing dates.get_charges,get_insolvency,get_company_registers,get_exemptionsandget_uk_establishmentsfor the rest.

Trace people and ownership—get_officers/ch officersfor who is in post,get_appointmentsandofficer_networkfor everywhere one person is appointed,get_ownership/ch ownershipfor persons with significant control, andget_officer_disqualificationsfor the disqualified directors register.

Read the filings—get_filings/ch filingsfor the filing history,get_filing_documentfor one filing in detail, anddownload_filing_document/ch documentfor the filed PDF itself.

Get the whole picture at once—company_report/ch reportreads the main records in a single call.due_diligence_check/ch checkscreens a company against the register and reports the entries a reviewer would want to look at.

Companies House records what companies file. It carries out basic completeness checks but does not verify that the information is accurate.

So nothing here is a verification, a credit check, a sanctions or politically-exposed-person screening, or a clearance decision.due_diligence_checkis a screening summary: it tells you what is on the register and what it could not check. It never concludes that a company is sound. An absence of adverse entries means nothing adverse has beenfiled.

The register also does not cover trading performance, litigation, or beneficial ownership held outside the persons-with-significant-control regime. Identity verification for existing directors and PSCs is still being rolled out under the Economic Crime and Corporate Transparency Act, so a name on the register does not mean the person behind it has been identity-checked.

Your API key stays with you. The CLI reads it from--key, thenCOMPANIES_HOUSE_API_KEY, then~/.config/companies-house/config.json, which is written with owner-only permissions.ch config showprints only the last four characters.

Nothing is sent anywhere except Companies House. There is no telemetry.

Companies House allows 600 requests per five minutes per key. The client queues requests to stay inside that, and if it does hit the limit it waits only when Companies House says the window is about to reset — otherwise it reports the limit rather than stalling.

Officer records include service addresses and dates of birth as published on the public register. Treat them as the personal data they are.

git clone https://github.com/aicayzer/companies-house-mcp.git cd companies-house-mcp pnpm install && pnpm build && pnpm test:unit

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