Companies House MCP

MCP server for the UK Companies House API. Connects Claude, Cursor, Zed, and other AI tools to live UK company data — 17 tools for search, profiles, officers, filings, ownership, charges, insolvency, and due diligence.

From v3.0.0 this package is a thin wrapper over companies-house-cli. Existing npx -y companies-house-mcp configs work unchanged.

Full docs: companies-house.uk

Get an API key

Register at developer.company-information.service.gov.uk — free, takes about 30 seconds.

Setup

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "companies-house": {
      "command": "npx",
      "args": ["-y", "companies-house-mcp"],
      "env": {
        "COMPANIES_HOUSE_API_KEY": "your-key-here"
      }
    }
  }
}

claude mcp add --transport stdio --env COMPANIES_HOUSE_API_KEY=your-key-here companies-house -- npx -y companies-house-mcp

Or add to ~/.claude.json manually:

{
  "mcpServers": {
    "companies-house": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "companies-house-mcp"],
      "env": {
        "COMPANIES_HOUSE_API_KEY": "your-key-here"
      }
    }
  }
}

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "companies-house": {
      "command": "npx",
      "args": ["-y", "companies-house-mcp"],
      "env": {
        "COMPANIES_HOUSE_API_KEY": "your-key-here"
      }
    }
  }
}

Add to ~/.config/zed/settings.json:

{
  "context_servers": {
    "companies-house": {
      "source": "custom",
      "command": "npx",
      "args": ["-y", "companies-house-mcp"],
      "env": {
        "COMPANIES_HOUSE_API_KEY": "your-key-here"
      }
    }
  }
}

Tools

Search

• search_companies — search UK companies by name, status, type, SIC code, or location
• search_officers — search for company officers by name

Company data

• get_company_profile — status, registered addresses, SIC codes, accounts and confirmation statement dates
• get_officers — current and resigned directors, secretaries, and other officers
• get_appointments — all appointments held by a specific officer across all companies
• get_ownership — persons with significant control (PSCs) and corporate ownership
• get_filings — filing history with document metadata and download links
• get_filing_document — retrieve a specific filing document
• get_charges — charges and mortgages registered against the company
• get_insolvency — insolvency proceedings, liquidations, and administrations
• get_company_registers — statutory registers (members, directors, secretaries)

Composite — combine multiple API calls into a single response

• company_report — full overview: profile, officers, ownership, charges, filings, and insolvency
• due_diligence_check — automated red-flag scan with HIGH/MEDIUM/LOW severity ratings
• officer_network — map a director's connections across all associated UK companies

Extended

• get_exemptions — disclosure exemptions
• get_uk_establishments — UK establishments of overseas companies
• get_officer_disqualifications — disqualification orders against an officer

Every tool returns formatted text for humans and structured JSON for agents. Full parameter reference at companies-house.uk/tools.

What you can ask

Once connected, ask naturally:

• "Look up Tesco on Companies House"
• "Who are the directors of Anthropic Limited?"
• "Run a due diligence check on company 14604577"
• "Show me the filing history for BrewDog"
• "What other companies is this director involved with?"
• "Does this company have any outstanding charges?"
• "Map the ownership structure of this holding company"
• "Are there any insolvency proceedings against this company?"

CLI

For terminal access without an AI assistant, install companies-house-cli. See companies-house.uk/cli for the full reference.

npm install -g companies-house-cli
ch search "Anthropic"
ch report 14604577

Disclaimer

Not affiliated with or endorsed by Companies House or the UK Government. Uses the publicly available Companies House API.

Licence

MIT