Sigistry Plugin Catalog (formerly Claude Registry) for ChatGPT

com.clauderegistry/plugin-catalog

Renamed: prefer com.sigistry/plugin-catalog. This legacy endpoint keeps working.

client:ChatGPT transport:streamable-http tools:8

Install Sigistry Plugin Catalog (formerly Claude Registry) in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://clauderegistry.com/mcp

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