POSTFACT — Resolve Ambiguous Side Effects Before Retry for ChatGPT

io.github.gsterlingpress/postfact

Resolve whether an uncertain side-effecting action completed before software retries it.

client:ChatGPT transport:streamable-http tools:1

Install POSTFACT — Resolve Ambiguous Side Effects Before Retry in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://postfact-api-production.up.railway.app/mcp

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