Trefle for ChatGPT

io.github.pipeworx-io/trefle

Trefle MCP — global plant database (1M+ species)

client:ChatGPT transport:streamable-http

Install Trefle in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://gateway.pipeworx.io/trefle/mcp

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