Simples Nacional for ChatGPT

io.github.mcp-dir/simples_nacional-mcp

Looks up a company's status in the Simples Nacional tax regime from the CNPJ, including opt-in and b

client:ChatGPT transport:streamable-http tools:7

Install Simples Nacional in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://api.mcp.ai/p_simples_nacional

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