UK Companies House (Registrum) - no API key for ChatGPT

io.github.registrumuk/uk-companies-house-mcp

UK company data: profiles, iXBRL financials, directors, PSC chains, ECCTA. Hosted, no key.

client:ChatGPT transport:streamable-http runtime:npm tools:9

Install UK Companies House (Registrum) - no API key in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://registrum.co.uk/api/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs