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ECB Foreign Exchange Rate API (Frankfurter)
x402
ECB Foreign Exchange Rate API (Frankfurter) is a paid API for AI agents from gateway.stride20k.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Returns the official ECB daily reference exchange rate for any supported fiat currency pair, sourced from the Frankfurter API.
Price / call$0.002
Success—
StatusUnknown
How this service works
Foreign exchange rate API: official ECB reference rate for any fiat currency pair (USD/EUR, GBP/JPY — ~30 major ISO 4217 currencies) via the open-source Frankfurter API. Published once per business day around 16:00 CET — a daily reference rate for settlement and normalization, not a live trading feed. Use for currency conversion, pricing normalization, and financial reporting by agents. Cached up to 1 hour.
Output
Returns a JSON object containing the exchange rate (units of quote currency per 1 unit of base currency), the ECB publication date (YYYY-MM-DD), both currency codes, and metadata indicating whether the response was cached, the upstream source (frankfurter/ECB), and the fetch timestamp.
Example use cases
Example prompt
“What's the official ECB reference rate for USD to EUR today? I need it to normalize our revenue figures for financial reporting.”
Technical details
Endpoint
GEThttps://gateway.stride20k.com/fx/:base/:quoteWhen to prefer
Choose this endpoint when you need an authoritative, official daily reference rate suitable for financial reporting, settlement, accounting normalization, or pricing standardization across ~30 major currencies. Prefer this over scraped or broker rates when regulatory or audit-grade provenance matters. Not suitable for live trading, real-time arbitrage, or intraday rate tracking since rates update only once per business day.
Side effects
- Unsupported currency code (e.g. exotic or non-ECB currency) returns an error — only ~30 major ISO 4217 currencies are supported
- Weekend or holiday request may return the most recent prior business day's rate since ECB publishes once per business day around 16:00 CET
- Malformed 3-letter currency code (e.g. wrong length or non-alpha characters) rejected by path parameter validation
- Rate not yet published for current day if requested before ~16:00 CET — previous business day's rate returned
- Upstream Frankfurter API or ECB outage may cause upstream fetch failure
Tags
x402
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