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FX Reference Rates Timeseries API
x402
FX Reference Rates Timeseries API is a paid API for AI agents from fx-reference-rates.regnotes.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-30).
Returns a daily exchange rate time series for a currency pair over a date range (up to 366 days), including per-day rates plus summary stats (min, max, mean, change%).
Price / call$0.003
Success—
StatusUnknown
How this service works
Daily reference rate series for base/symbol between start and end (max 366 days), with min/max/mean and change.
Output
A JSON object containing the base and symbol currency codes, start and end dates, the total number of data points, an array of daily {date, rate} objects for each trading/publication day in the range, and a stats object with min, max, mean, and change_pct values across the period.
Example use cases
Quarterly FX exposure report
“Pull the daily EUR to USD exchange rates for the entire third quarter of 2025 — July 1 through September 30 — and give me the min, max, mean, and how much it changed over that period.”
Travel budget planning check
“What were the GBP to EUR daily rates between January 1 and January 31, 2026? I want to see the trend and the average rate for that month.”
Currency volatility analysis
“Get me the daily BRL to USD rates from March 1 to June 30, 2025 — I need the full time series plus the percentage change over those four months to assess volatility.”
Technical details
Endpoint
GEThttps://fx-reference-rates.regnotes.workers.dev/v1/rates/timeseries?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a time series of daily historical FX rates over a defined multi-day or multi-month window, along with aggregate statistics (min/max/mean/change). Prefer it over a single-date lookup when you need trend analysis, charting data, or period-level summaries. It covers 30 major currencies using authoritative ECB reference rates, making it suitable for financial reporting, compliance, and analytics. It is not suitable for real-time intraday rates or currencies outside the ECB's published set.
Side effects
- Date range exceeds 366 days — returns an error; split into multiple requests
- Invalid currency code (not in the supported 30-currency list) — returns validation error
- Start date after end date — invalid range error
- Non-trading days (weekends, ECB non-publication days) are skipped or fall back to prior publication day
- Future dates beyond available data return partial or empty series
- Missing required query parameters (base, symbol, start, end) return 400-level errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"end": "2026-09-30",
"base": "USD",
"start": "2026-09-01",
"stats": {
"max": 160.1639,
"min": 153.2698,
"mean": 156.388,
"change_pct": -1.9773
},
"points": 22,
"series": [
{
"date": "2026-09-01",
"rate": 160.1639
}
],
"symbol": "JPY"
}
}Tags
x402
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