Facet for ChatGPT

io.github.halfspacelabs/facet

Facet's agent builds, evaluates, serves and maintains a small model for one repeated task.

client:ChatGPT transport:streamable-http

Install Facet in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://facet.halfspacelabs.com/mcp

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