17hats MCP Server and API by Cotlet for ChatGPT

dev.cotlet/17hats

17hats solo service business CRM MCP server: add contact, create project, send quote, send invoice.

client:ChatGPT transport:streamable-http

Install 17hats MCP Server and API by Cotlet in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://cotlet.dev/mcp/v1/17hats/connect

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