API Playground

Demo receipts are marked environment: nonproduction and demo: true. Production evaluation uses the authenticated API.

This playground is currently offline from the public internet, and Evaluate will return 404. Its endpoint (POST /v1/demo/evaluate) was withdrawn at the edge on 2026-07-28 along with every other receipt-minting route, after a security review found that any internet-reachable mint path — synthetic or not — is a signing oracle. We would rather leave this page visibly unavailable and say why than quietly take it down. Verification still works and needs no key: fetch any receipt from the ledger and check it with POST /v1/verify, which is public. That is the part worth trying anyway — anyone can verify our records; only we can mint them.