Oh Fax for ChatGPT

com.ohfax/ohfax

Outbound US/CA fax for agents: quote PDF, pay via MPP, get delivery receipt.

client:ChatGPT transport:streamable-http tools:4

Install Oh Fax in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://app.ohfax.com/mcp

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