Companies House MCP Server

Access UK company data through the Companies House API directly in MCP clients.

Features

45+ tools covering the full Companies House API:

• Company info — profile, registered address, registers, insolvency, exemptions, UK establishments
• Search — companies (basic & advanced), officers, disqualified officers, dissolved companies, alphabetical
• Officers — directors list, appointments, disqualifications
• Filing history — accounts, annual returns, document details
• PSC (ownership) — individuals, corporate entities, legal persons, statements, verification
• Charges — mortgages, debentures, charge details

Setup

1. Get an API key

Register at the Companies House Developer Hub and create an application.

2. Configure your MCP client

Add to your Claude Desktop config (`~/Library/Application Support/Claude/claude_desktop_config.json` on Mac, `%APPDATA%\Claude\claude_desktop_config.json` on Windows):

{
  "mcpServers": {
    "companies-house": {
      "command": "npx",
      "args": ["-y", "companies-house-mcp-server"],
      "env": {
        "COMPANIES_HOUSE_API_KEY": "your_api_key_here"
      }
    }
  }
}

Build from source (optional)

git clone https://github.com/stefanoamorelli/companies-house-mcp.git
cd companies-house-mcp
npm install && npm run build

Then point your MCP client to `node /path/to/companies-house-mcp/dist/index.js`.

Development

npm test            # Run tests
npm run typecheck   # Type checking
npm run lint        # Linting
npm run build       # Build
npm run dev         # Run locally

API Rate Limits

600 requests per 5 minutes per API key. Some endpoints may have additional restrictions.

License

GNU Affero General Public License v3.0 — see LICENSE.

For commercial licensing: stefano@amorelli.tech

© 2025 Stefano Amorelli (https://amorelli.tech)