satledger timestamp receipt for ChatGPT

org.satledger/timestamp-receipt

RFC 3161 timestamps, paid per call over x402. No account; verifies offline against the authority.

client:ChatGPT transport:streamable-http tools:1

Install satledger timestamp receipt in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://api.satledger.org/mcp

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