autumn for ChatGPT

io.usefulapi/autumn

MCP server for Autumn — read customers, plans, balances & invoices; track usage and attach plans.

client:ChatGPT transport:streamable-http

Install autumn in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://autumn.usefulapi.io/mcp

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