Firmograph for ChatGPT

io.github.apigrid-ch/firmograph

Public-record + domain-graph company lookup. Coverage block, explicit 404. x402 POST /v1/enrich.

client:ChatGPT transport:streamable-http tools:1

Install Firmograph in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://firmograph.apigrid.ch/mcp

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