KeyHalve - verify sealed documents for ChatGPT

com.keyhalve/verify

Free, no-account verification of KeyHalve-sealed documents. Read-only; never receives keys.

client:ChatGPT transport:streamable-http runtime:npm tools:3

Install KeyHalve - verify sealed documents in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.keyhalve.com/mcp

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