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CelerAPI FX Rate Lookup
x402
CelerAPI FX Rate Lookup is a paid API for AI agents from www.celerapi.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns live foreign exchange rates sourced from the European Central Bank via Frankfurter, for any supported currency pair.
Price / call$0.001
Success—
StatusUnknown
How this service works
Resolve companies, legal entities and financial reference data using authoritative sources. Machine-native, pay per request, no subscription.
Output
A JSON object containing the live exchange rate for the requested currency pair, a success flag, completeness indicator, any warnings, and full provenance metadata including the data source (ECB via Frankfurter), license, provider name, freshness status, and source URL.
Example use cases
Invoice currency conversion for freelancers
“I need to know the current EUR to GBP exchange rate so I can calculate how much to charge my UK client on this invoice.”
Travel budget planning
“What's today's official exchange rate from US dollars to Japanese yen? I'm trying to figure out how much cash to bring on my trip.”
Financial report currency normalization
“Can you pull the live ECB reference rate for USD to CHF? I need to normalize some figures in my quarterly finance report into Swiss francs.”
Technical details
Endpoint
GEThttps://www.celerapi.com/v1/fx/rateWhen to prefer
Choose this endpoint when you need live, authoritative foreign exchange rates backed by the European Central Bank, with full provenance metadata included. It is particularly well-suited for financial calculations, invoice conversion, and compliance use cases where data sourcing and licensing must be transparent. Prefer it over generic FX endpoints when you need ECB reference rates specifically, or when you want a pay-per-request model with no API key or subscription overhead.
Side effects
- Unsupported or invalid currency code returns an error response
- Network or upstream Frankfurter API unavailability may cause failures
- Same base and target currency may return a trivial or error result
- ECB rates are only updated on business days; stale rates on weekends/holidays may be returned with warnings
Output
Schema · Response
{
"type": "json",
"example": {
"data": {},
"success": true,
"complete": true,
"warnings": [],
"provenance": {
"source": "European Central Bank reference rates via Frankfurter",
"license": "Frankfurter MIT; underlying ECB terms apply",
"provider": "frankfurter",
"freshness": "live",
"source_url": "https://api.frankfurter.dev"
}
}
}Tags
x402
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