Invoice Maven MCP by usefulapi for ChatGPT

io.usefulapi/invoice-maven

Search existing fiscal documents without creating or cancelling any, in Invoice Maven.

client:ChatGPT transport:streamable-http tools:1

Install Invoice Maven MCP by usefulapi in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://invoice-maven.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