ProPost for ChatGPT

com.propost-ai/propost

Draft, schedule and publish social posts to 12 networks from your AI assistant, in your own voice.

client:ChatGPT transport:streamable-http

Install ProPost in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://www.propost-ai.com/api/mcp

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