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fx402 Currency & Unit Converter
x402
fx402 Currency & Unit Converter is a paid API for AI agents from fx402.alogos.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Converts between ISO-4217 currencies using ECB daily reference rates, returning the converted amount for a given source/target currency pair and optional amount.
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call currency and unit conversion utility for AI agents: currency exchange at ECB daily reference rates, FX rate tables, and physical unit conversion (length, mass, temperature, volume, area, speed, time, digital). No API key, no subscription — agents pay per request via x402 (Base/USDC) or MPP (Tempo/pathUSD).
Output
Returns the converted monetary amount in the target currency, computed using the ECB daily reference rate for the specified currency pair. Includes the exchange rate applied and the resulting value.
Example use cases
Example prompt
“How much is 500 US dollars in euros right now, using the ECB daily rate?”
Technical details
Endpoint
GEThttps://fx402.alogos.xyz/v1/convertWhen to prefer
Choose this endpoint when you need currency conversion using official ECB daily reference rates with no API key or subscription required, paying only per call via x402/USDC. Ideal for AI agents needing lightweight, on-demand FX conversion without managing credentials or rate-limit tiers.
Side effects
- Unsupported or invalid ISO-4217 currency code returns an error response
- Missing required 'from' or 'to' parameters returns a validation error
- ECB rate not yet published for the current day (e.g. early morning UTC) may return stale or unavailable data
- Payment not completed (402 response) if x402/MPP payment header is missing or rejected
- Amount of 0 or negative values may produce unexpected results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| torequired | string | Target ISO-4217 currency code, e.g. 'EUR'. |
| fromrequired | string | Source ISO-4217 currency code, e.g. 'USD'. |
| amount | number | Amount in the source currency to convert. Defaults to 1. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| to | string | |
| from | string | |
| rate | number | |
| amount | number | |
| result | number | |
| source | string | |
| converted | number | |
| ratesDate | string |
Tags
x402
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