UK Companies House public register: search companies, officers, ownership, filings and documents.
Connect Runs on your machine
claude mcp add companies-house -e COMPANIES_HOUSE_API_KEY=<COMPANIES_HOUSE_API_KEY> -- npx -y [email protected]{
"mcpServers": {
"companies-house": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"COMPANIES_HOUSE_API_KEY": "<COMPANIES_HOUSE_API_KEY>"
}
}
}
}{
"mcpServers": {
"companies-house": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"COMPANIES_HOUSE_API_KEY": "<COMPANIES_HOUSE_API_KEY>"
}
}
}
}{
"servers": {
"companies-house": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"COMPANIES_HOUSE_API_KEY": "<COMPANIES_HOUSE_API_KEY>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
COMPANIES_HOUSE_API_KEYOptional | Your own API key from developer.company-information.service.gov.uk — free to register |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 30 Sep 2026 |
| Last updated | 30 Sep 2026 |
| Registry name | io.github.aicayzer/companies-house |
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