SendFast for ChatGPT

ai.sendfast/sendfast

Agent-native marketing email: draft, edit, screenshot, and send from your verified domain.

client:ChatGPT transport:streamable-http

Install SendFast in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://sendfast.ai/api/mcp

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