Perimeter Watch for ChatGPT
io.github.entradox/perimeter-watch-scanner
Passive domain-perimeter checks — cert expiry, subdomain takeover, lookalikes — as agent tools
client:ChatGPT
transport:streamable-http
tools:6
Install Perimeter Watch in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://perimeter-watch-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