risk data for machine payments
Endpoint
quartermaster.surewhynot.app/v1/payment-proof
Verify an x402 settlement on Base OR Solana: pass a 0x transaction hash or a base58 signature, confirm it succeeded, decode its USDC transfers (event logs on Base, net token-balance deltas on Solana), and optionally assert the receiving wallet and amount.
Score
The score is built from observations we collect ourselves: how the endpoint responds, what the envelope contains, how stable the price and the recipient are, who pays and how often. It is deterministic — the same input always produces the same result.
We do not publish the exact methodology yet. If you own this endpoint, write to us and we will show you, item by item, what drags the score down.
Recent probes
| When | Code | Latency | Scheme and network | Recipient | Price | Findings |
|---|---|---|---|---|---|---|
| 57m ago | 402 | 16 ms | exact eip155:8453 |
0x5253…19cb | 0.003000 | clean |
| 5h ago | 402 | 14 ms | exact eip155:8453 |
0x5253…19cb | 0.003000 | clean |
| 9h ago | 402 | 80 ms | exact eip155:8453 |
0x5253…19cb | 0.003000 | clean |
| 4d ago | 402 | 11 ms | exact eip155:8453 |
0x5253…19cb | 0.003000 | clean |
| 4d ago | 402 | 10 ms | exact eip155:8453 |
0x5253…19cb | 0.003000 | clean |
| 4d ago | 402 | 9 ms | exact eip155:8453 |
0x5253…19cb | 0.003000 | clean |
Settlements to this wallet
| When | Payer | Amount | Facilitator | Transaction |
|---|---|---|---|---|
| 2d ago | 0xdae6…54dc | $0.00100 | not in registry | 0x320e75…7f35 |
| 3d ago | 0x1aa0…895c | $0.00100 | not in registry | 0xa23a80…4504 |
| 3d ago | 0xdf1c…b6af | $0.00100 | not in registry | 0x8b4eaf…6c43 |
| 3d ago | 0xc9c7…1670 | $0.00100 | not in registry | 0xa83c10…65f4 |
| 3d ago | 0xc9c7…1670 | $0.00100 | not in registry | 0xd44614…5a33 |
| 4d ago | 0x54e1…f4e0 | $0.00100 | not in registry | 0xd2e50a…afb9 |
| 4d ago | 0x54e1…f4e0 | $0.00100 | not in registry | 0xc68649…1d7b |
| 4d ago | 0xcaa2…e16b | $0.00200 | not in registry | 0x6a7c86…4384 |
| 4d ago | 0xcaa2…e16b | $0.01 | not in registry | 0x61377e…3964 |
| 4d ago | 0xf9eb…e9d0 | $0.00100 | not in registry | 0xef172a…e7ab |
| 4d ago | 0x5a31…f695 | $0.00100 | not in registry | 0xe884fb…8fb5 |
| 4d ago | 0xf828…3fff | $0.00100 | not in registry | 0x80f5fb…d1c0 |
| 5d ago | 0x8749…bc9c | $0.00500 | not in registry | 0x8ad30f…3316 |
| 5d ago | 0x8749…bc9c | $0.00500 | not in registry | 0xeecdc1…4522 |
| 5d ago | 0x8749…bc9c | $0.00500 | not in registry | 0xd2a44f…a932 |
Reference
| URL | https://quartermaster.surewhynot.app/v1/payment-proof |
| Sources | bazaar |
| Recipient per catalogue | 0x5253666c40432f009ebd99908b9cd2a7fd1019cb |
| Price per catalogue | 0.003000 |
| Machine access | /v1/endpoint · /full · badge |
Is this your endpoint?
The score is built only from public observations. If something we recorded is wrong — say our prober hit you during maintenance — write to us. We will recheck and publish your reply next to the score.
We do not delete accurate observations. The prober makes at most one request per second per host and only asks for the payment challenge — it never pays and never takes content.