SofortFax – Faxen mit KI (Login) for ChatGPT

de.sofortfax/fax-oauth

Fax from ChatGPT/Claude with OAuth sign-in: pay per fax or KI credits. DE/AT + 40 countries.

client:ChatGPT transport:streamable-http

Install SofortFax – Faxen mit KI (Login) in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://sofortfax.de/api/mcp-oauth.php

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