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ECB FX Rate Historical Series
x402
ECB FX Rate Historical Series is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Returns a per-pair historical fixing series over a date range (daily, weekly, or monthly) with min, max, avg, and percent-change stats, covering ECB reference rates back to 1999.
Price / call$0.005
Success—
StatusUnknown
Output
Returns an array of [fixingDate, rate] data points for the specified currency pair and interval, plus aggregate stats (min, max, avg, first, last, changePct) over the requested date range, and metadata about the rate type (ecb-daily-reference) and data source.
Example use cases
Example prompt
“Can you pull the monthly EUR/USD ECB fixing series from January 2020 to December 2023, including the min, max, average, and percent change over that period?”
Technical details
Endpoint
POSThttps://x402.professorsausages.com/fx-rates/historyWhen to prefer
Choose this endpoint when you need a time-series of ECB official reference rates for a specific currency pair over a date range, with aggregated statistics. Prefer it over single-rate lookups when you need trend analysis, volatility stats, or charting data. It complements the single-date cross-rate endpoint when historical depth or interval aggregation is required.
Side effects
- Unsupported currency pair (not covered by ECB fixings) returns an error or empty points array
- Invalid date range (e.g. before 1999 or future dates) may return empty or partial results
- Malformed interval value (not daily/weekly/monthly) causes a validation error
- Network or payment authorization failure returns a 402 or 5xx error
Tags
x402
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