Brazil CNPJ company registry for ChatGPT

io.github.bnovarini/cnpj-mcp

Brazil's open CNPJ registry: filter and count companies by sector, place, size, MEI, partners.

client:ChatGPT transport:streamable-http tools:8

Install Brazil CNPJ company registry in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://cnpj-mcp.fly.dev/mcp

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