Tiered payment receipt (tier 3): pay once with x402 and get back a short-lived receipt token that /pay/verify checks for you. The tier is fixed by the path - you do not send it. Optional ?ref= carries your own opaque reference, such as a query hash, straight through to the receipt. This mints a receipt rather than returning data, so there is no lookup that can come back empty. $0.10 per call.
Coinbase Agentic Market feed · snapshot May 2026 (not live on-chain)
| From | Amount | When |
|---|---|---|
| 0xa087fa…d648 | $0.0050 | 2026-08-16T09:50:31 |
| 0xa087fa…d648 | $0.0050 | 2026-08-16T09:50:29 |
| 0xa087fa…d648 | $0.0050 | 2026-08-16T09:50:27 |
| 0xa087fa…d648 | $0.0050 | 2026-08-16T09:50:27 |
| 0xa087fa…d648 | $0.0050 | 2026-08-16T09:50:25 |
| 0xa087fa…d648 | $0.0050 | 2026-08-16T09:50:23 |
| 0xa087fa…d648 | $0.0100 | 2026-08-16T09:50:21 |
| 0xa087fa…d648 | $0.0050 | 2026-08-16T09:50:21 |
| 0xa087fa…d648 | $0.0100 | 2026-08-16T09:50:19 |
| 0xa087fa…d648 | $0.0900 | 2026-08-16T09:50:17 |