{"ok":true,"type":"accord.provider_endpoint.v0","provider":"sage","protocol":"accord","version":"v0","level":"L1","target":"https://www.ergoblockchain.org/api/sage/accord","agreement_template":"https://www.ergoblockchain.org/api/sage/quote","conformance_evidence":"https://www.ergoblockchain.org/evidence/sage/conformance-l1-2026-05-20.signed.json","public_signing_key":"https://www.ergoblockchain.org/evidence/sage/provider-signing-key.json","accepted_rails":["ergo"],"payment_header":{"name":"X-Accord-Payment","schema":{"type":"object","required":["receipt_id"],"properties":{"receipt_id":{"type":"string"}}}},"notes":"POST without Accord headers returns a 402 challenge. POST with x-accord-agreement-id and x-accord-payment={\"receipt_id\":\"...\"} validates the stored Sage receipt bundle. Signed L1 conformance evidence is published for the first post-Blob full receipt bundle."}