io.github.aicayzer/companies-house
companies-house
Is the io.github.aicayzer/companies-house MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.
UK Companies House public register: search companies, officers, ownership, filings and documents.
alive probed 2026-11-15 · unchanged since 2026-10-30
- Run it
- npx -y companies-house-mcp@4.0.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- companies-house 4.0.1
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.7 % of a 1M context window
- Count
- 6.8k tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 6.9k. The o200k_base estimate is 4.1k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/aicayzer/companies-house-mcp
- Registry
- active, updated 2026-09-30 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.63×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| download_filing_document | 580 | 355 | 9 % |
| search_companies | 580 | 355 | 9 % |
| get_officers | 529 | 324 | 8 % |
| get_filings | 493 | 302 | 7 % |
| get_ownership | 446 | 273 | 7 % |
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Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.