ProSignature email signatures for ChatGPT

co.prosignature/email-signatures

Build free email signatures, quote Pro and Teams prices, get install steps. Read-only, no account.

client:ChatGPT transport:streamable-http tools:5

Install ProSignature email signatures in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://prosignature.co/mcp

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