Summary
Wraps the Registrum API to give Claude structured access to UK Companies House data without needing a separate CH developer account. Five tools let you search companies by name, pull enriched profiles with SIC codes and compliance flags, extract structured financials from parsed iXBRL filings, list directors with full appointment histories, and map corporate networks through shared directors. Registrum caches responses for 24 hours and handles rate limiting and circuit breaking on CH outages. Requires a Registrum API key with a free tier of 50 calls per month. Useful when you need clean UK company financials and director relationships without wrestling with iXBRL parsing or Companies House API quotas yourself.
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
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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
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →Configuration
REGISTRUM_API_KEY*secretYour Registrum API key. Get a free key at https://registrum.co.uk (50 calls/month free).
Categories
Registryactive
Package@registrum/mcp
TransportSTDIO
AuthRequired
UpdatedMar 5, 2026
