WriteStack for ChatGPT

io.writestack/mcp

Draft & schedule Substack Notes, manage articles, and read stats via WriteStack.

client:ChatGPT transport:streamable-http

Install WriteStack in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://www.writestack.io/api/mcp/mcp

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