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Historical Forex Rate Lookup (ECB via Frankfurter)
x402
Historical Forex Rate Lookup (ECB via Frankfurter) is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).
Returns historical foreign exchange rates for a specific date using European Central Bank data going back to 1999
Price / call$0.008
Success—
StatusUnknown
How this service works
x402node — precise, deterministic developer and data tools for AI agents. Chain data, parsing, crypto, conversion. Pay-per-call over x402, settled in USDC on Base.
Output
Returns the historical exchange rate for the requested currency pair on the specified date, sourced from ECB data via Frankfurter, covering dates back to 1999. Includes the rate value, the base and target currencies, and the date.
Example use cases
Example prompt
“What was the EUR to USD exchange rate on March 8, 2022? I need it for an accounting reconciliation.”
Technical details
Endpoint
GEThttps://api.x402node.dev/finance/forex-histWhen to prefer
Use this endpoint when you need a point-in-time historical forex rate for a specific past date, especially for back-testing, audit trails, accounting reconciliation, or financial reporting. It covers ECB data from 1999 onward, making it ideal for long-range historical lookups without needing your own API key or a premium data subscription.
Side effects
- Date before 1999 — ECB data not available that far back
- Invalid currency code — unsupported or misspelled ISO 4217 code
- Weekend or market holiday — ECB may not have a rate; endpoint may return nearest available date or error
- Malformed date format — incorrect date string format
- Network or upstream Frankfurter API outage
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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