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FX Rates by Hergertsynthora (ECB/Frankfurter)
x402
FX Rates by Hergertsynthora (ECB/Frankfurter) is a paid API for AI agents from fx-rates.hergertsynthora.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).
Returns foreign-exchange reference rates for 30+ currencies sourced from the European Central Bank via Frankfurter, given a base currency and optional target symbols.
Price / call$0.02
Success—
StatusUnknown
How this service works
Foreign-exchange reference rates for 30+ currencies (ECB via Frankfurter). Deterministic, keyless.
Output
A set of exchange rate values for the requested currency pairs, derived from ECB reference data. Each rate represents how much of each target currency (symbols) equals one unit of the base currency.
Example use cases
Example prompt
“What are the current ECB reference exchange rates for USD, GBP, JPY, and CHF using EUR as the base currency?”
Technical details
Endpoint
POSThttps://fx-rates.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need deterministic, official ECB foreign-exchange reference rates for 30+ currencies without an API key. Ideal for agents that need FX data for conversion, display, or enrichment and want a pay-per-call model with no signup. Prefer over other FX APIs when ECB provenance is important or when keyless access is required.
Side effects
- Upstream ECB/Frankfurter failure — no charge applied, but rates unavailable
- Invalid or unsupported currency code in base or symbols — likely returns an error or empty rates
- Missing or malformed X-WALLET header — may result in payment/access failure after the 3 free calls
- Network timeout or service unavailability
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| baserequired | string | base |
| symbolsrequired | string | symbols |
Tags
x402
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