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Search UK companies, get financials, directors, and networks via the Registrum Companies House API.
About
Search UK companies, get financials, directors, and networks via the Registrum Companies House API.
Security Report
4.8
Use Caution4.8High RiskClean MCP server for Companies House API access with proper authentication and appropriate permissions. Good error handling and input validation with no significant security concerns, though API keys are not validated at startup. Supply chain analysis found 1 known vulnerability in dependencies (1 critical, 0 high severity). Package verification found 1 issue (1 critical, 0 high severity).
5 files analyzed · 4 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Your Registrum API key. Get a free key at https://registrum.co.uk (50 calls/month free).Required
Environment variable: REGISTRUM_API_KEY
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-vdmeu-registrum-mcp": {
"env": {
"REGISTRUM_API_KEY": "your-registrum-api-key-here"
},
"args": [
"-y",
"@registrum/mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
Registrum MCP Server
No Companies House API key needed. One Registrum API key gives your AI agent enriched, cached UK company data — structured financials, director networks, and company profiles — directly inside Claude, Cursor, and any MCP-compatible client.
Unlike raw Companies House API wrappers that require you to register at the CH developer portal and manage your own rate limits, Registrum handles all of that for you: iXBRL filings parsed into clean JSON, 24h/7d caching, and circuit-breaker resilience on CH outages.
5 tools, zero boilerplate. Search companies, pull structured financials, list directors, and map corporate networks.
Installation
Claude Desktop
Add to ~/.claude/claude_desktop_config.json:
{
"mcpServers": {
"registrum": {
"command": "npx",
"args": ["-y", "@registrum/mcp"],
"env": {
"REGISTRUM_API_KEY": "reg_live_..."
}
}
}
}
Get a free API key at registrum.co.uk (50 calls/month free).
Cursor
Add to .cursor/mcp.json in your project, or to ~/.cursor/mcp.json globally — same format as above.
Tools
| Tool | Description |
|---|---|
search_company | Search for UK companies by name |
get_company | Enriched company profile (age, overdue flags, SIC descriptions) |
get_financials | Structured P&L + balance sheet from iXBRL filings |
get_directors | Directors with full appointment history across all companies |
get_network | Corporate network via shared director connections |
Example prompts
"Who are the directors of Tesco PLC and what other companies are they associated with?"
"Get the latest financials for company 00445790"
"Search for companies named 'Rolls-Royce' and show me their status"
"Map the director network for Barratt Developments to depth 2"
Plans
| Plan | Price | Calls/month |
|---|---|---|
| Free | £0 | 50 |
| Pro | £49/mo | 2,000 |
| Enterprise | £149/mo | 10,000 |
API reference
Full API docs at api.registrum.co.uk/docs
Support
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