everbill MCP by usefulapi for ChatGPT
io.usefulapi/everbill
Read and create bills, customers and articles, and send bills by email in everbill.
client:ChatGPT
transport:streamable-http
tools:13
Install everbill MCP by usefulapi in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://everbill.usefulapi.io/mcp
Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs