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clonecho.builda.company FX Historical Rates
x402
clonecho.builda.company FX Historical Rates is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Returns ECB-sourced historical foreign-exchange rates for a given base currency and date, optionally filtered to specific target currencies.
Price / call$0.02
Success—
StatusUnknown
How this service works
MARKETS: foreign-exchange rates for a base currency on a specific past date (?date=2020-01-02&base=USD&symbols=EUR,GBP). ECB-sourced via Frankfurter. Returns JSON.
Output
A JSON object containing the historical exchange rates for the requested base currency on the specified date, with rate values for each requested target currency symbol, sourced from the European Central Bank via Frankfurter.
Example use cases
Reconcile multi-currency invoices with historical rates
“I need to reconcile invoices from last March that were in EUR and GBP. Can you pull the official ECB exchange rates for those currencies against USD on the invoice date? It's important that these are the actual historical rates from that specific day for accounting compliance.”
Backtest currency conversion for portfolio analysis
“I'm analyzing how our investment portfolio would have performed if we'd converted to different currencies. Pull the historical exchange rates for USD against EUR, GBP, JPY, and CAD for each quarter throughout 2021 so I can calculate what our returns would have been in each currency.”
Calculate reimbursement costs for international business travel
“One of our employees traveled to multiple countries last September and submitted expense reports in local currencies. I need the official ECB historical rates for EUR, GBP, and CHF against USD for September 15th so I can convert their expenses accurately and reimburse them at the proper rate.”
Technical details
Endpoint
POSThttps://clonecho.builda.company/x402/fx-historicalWhen to prefer
Use this endpoint when you need official, ECB-sourced historical forex rates for a specific past date — ideal for invoice reconciliation, accounting, historical financial analysis, or backtesting currency conversions. Prefer this over real-time FX endpoints when the date is in the past and you need a trustworthy, standardized reference rate.
Side effects
- Invalid date format returns an error (must be YYYY-MM-DD)
- Future dates or dates before ECB data availability return no data or error
- Unsupported currency symbols return an error or empty rates
- Weekends and ECB holidays may have no published rates
- Malformed query parameters result in a 400-level error
Tags
x402
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