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api.hergertsynthora.com v1 exchange-rates-verified
https://api.hergertsynthora.com/v1/exchange-rates-verified
answers 402
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.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0xEf879BFD6C4AccB8F795136de90246e1EC245e06
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 150 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:12:56.336Z (2h ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.hergertsynthora.com%2Fv1%2Fexchange-rates-verified"