canonicalhash for ChatGPT

io.github.mlartab2/canonicalhash

Deterministic JSON hashing and EIP-712 attestations for AI agents via x402.

client:ChatGPT transport:streamable-http tools:5

Install canonicalhash in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://canonicalhash-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