risk data for machine payments
Endpoint
api.hergertsynthora.com/v1/exchange-rates-verified
SYNTHORA exchange-rates-verified: FX rates for 160+ currencies CROSS-VERIFIED between two independent sources (ECB official fixing via frankfurter.app vs market aggregate open.er-api.com) with per-currency deviation in bps and divergence alert >50 bps. The product is the discrepancy: a bad rate breaks a financial agent. Free sources, no key. $0.005 USDC x402 Base.
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We do not publish the exact methodology yet.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 |
|---|---|---|---|---|---|---|
| 5h ago | 402 | 23 ms | exact eip155:8453 |
0xEf87…5e06 | 0.030000 | clean |
| 12h ago | 402 | 79 ms | exact eip155:8453 |
0xEf87…5e06 | 0.030000 | clean |
| 4d ago | 402 | 244 ms | exact eip155:8453 |
0xEf87…5e06 | 0.030000 | clean |
| 4d ago | 402 | 238 ms | exact eip155:8453 |
0xEf87…5e06 | 0.030000 | clean |
Reference
| URL | https://api.hergertsynthora.com/v1/exchange-rates-verified |
| Sources | well-known bazaar |
| Recipient per catalogue | 0xEf879BFD6C4AccB8F795136de90246e1EC245e06 |
| Price per catalogue | 0.030000 |
| 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.