Electronic Invoice API for ChatGPT

app.electronic-invoice/mcp

Validate, generate, convert and extract EN 16931 e-invoices for businesses.

client:ChatGPT transport:streamable-http tools:7

Install Electronic Invoice API in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.electronic-invoice.app/mcp

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