SignSimple for ChatGPT

app.signsimple/signsimple

Send PDFs for legally binding e-signature, free and unlimited. Track status; free legal templates.

client:ChatGPT transport:streamable-http tools:4

Install SignSimple in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://signsimple.app/mcp

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