Joist MCP Server and API by Cotlet for ChatGPT

dev.cotlet/joist

Joist contractor estimating and invoicing MCP server: create estimate, convert estimate to invoice.

client:ChatGPT transport:streamable-http

Install Joist MCP Server and API by Cotlet in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://cotlet.dev/mcp/v1/joist/connect

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