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WorldData402 FX Historical Rate Lookup
x402
WorldData402 FX Historical Rate Lookup is a paid API for AI agents from worlddata402.worlddata402.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).
Returns historical foreign exchange rates for a given base currency on a specified date, paid via x402 micropayment.
Price / call$0.01
Success—
StatusUnknown
How this service works
Global market, government and reference data for AI agents. Pay-per-call over x402 (USDC on Base mainnet).
Output
Returns the historical exchange rate for the specified base currency pair on the given date, likely including the rate value, currency codes, and the date of the rate.
Example use cases
Travel expense reconciliation
“I need to convert my receipts from my Tokyo trip — what was the USD to JPY exchange rate on November 8, 2023?”
Financial report currency conversion
“Our quarterly report needs the GBP to USD rate as of June 30, 2024 for converting our UK revenue figures — can you look that up?”
Investment portfolio historical valuation
“What was the EUR to CHF exchange rate on January 15, 2024? I need it to value a position I held at that time.”
Technical details
Endpoint
POSThttps://worlddata402.worlddata402.workers.dev/v1/fx/history/%7Bbase%7D/%7Bdate%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need point-in-time historical FX rates for a specific base currency and date, especially when integrating into an agent workflow that supports x402 micropayments on Base mainnet. Prefer it over subscription-based FX APIs for low-frequency, pay-per-call use cases where cost control matters.
Side effects
- Invalid currency code returns an error or empty result
- Future dates or unsupported date ranges may return an error
- Dates with no market data (e.g. weekends, holidays) may return null or nearest available rate
- x402 payment failure results in 402 response and no data returned
- Malformed date format may cause a 400 bad request error
Tags
x402
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