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SYNTHORA Exchange Rates Verified
x402
SYNTHORA Exchange Rates Verified is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).
Cross-verifies FX rates for 160+ currencies between ECB official fixing (frankfurter.app) and market aggregate (open.er-api.com), reporting per-currency deviation in basis points and flagging divergences above 50 bps
Price / call$0.03
Success—
StatusUnknown
How this service works
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.
Output
Returns cross-verified exchange rates for 160+ currencies with the ECB official fixing rate, the market aggregate rate, per-currency deviation in basis points, and a divergence alert flag for any currency exceeding 50 bps discrepancy between the two sources.
Example use cases
Pre-trade FX rate sanity check
“Before I execute this currency conversion for $500,000 USD to EUR, cross-verify the EUR/USD rate between the ECB official fixing and the market rate — tell me the deviation in basis points and warn me if it's over 50 bps.”
Financial agent data quality guard
“My trading agent is about to use live FX rates — run a cross-verification check across all 160+ currencies to detect any rates where the ECB fixing and the market aggregate diverge by more than 50 basis points, so I can block bad data before it causes a bad trade.”
Daily FX divergence monitoring report
“Give me today's cross-verified FX rate report comparing ECB official rates with the market aggregate, and highlight every currency where the deviation exceeds 50 basis points so I can flag them for review.”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/exchange-rates-verifiedWhen to prefer
Choose this endpoint when data quality and rate integrity are critical — especially before executing large FX conversions, feeding rates into a financial agent, or auditing third-party FX data. It is uniquely valuable because it provides a dual-source deviation score in basis points rather than just a rate, making it the right choice when you need to trust the data, not just retrieve it. Prefer this over single-source FX APIs whenever a bad rate could cause financial loss or downstream agent errors.
Side effects
- Upstream source unavailable: if frankfurter.app or open.er-api.com is down, rates for affected currencies cannot be cross-verified
- Stale data: if either source lags, the deviation may reflect a timing mismatch rather than a genuine discrepancy
- Currency not covered by one source: some exotic currencies may only appear in one of the two data providers, preventing cross-verification
- Payment failure: x402 USDC payment on Base not processed, call rejected
- High-deviation false positives during market open/close when ECB fixing hasn't updated yet
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | 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-cur |
Tags
x402
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