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x402 AI Gateway — ARS/CUP Currency Converter
x402
x402 AI Gateway — ARS/CUP Currency Converter is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0002/call, status unknown (last checked 2026-10-12).
Converts a specified amount from Argentine Peso (ARS) to Cuban Peso (CUP), gated by an x402 USDC micropayment on Base.
Price / call$0.0002
Success—
StatusUnknown
How this service works
Self-hosted AI API gateway. Expensive endpoints require an x402 micropayment (USDC on Base) before executing.
Output
Returns the converted currency value from ARS to CUP for the specified input amount, delivered as a JSON object with the result.
Example use cases
Travel budget estimate ARS to CUP
“I'm planning a trip and need to know how much 5000 Argentine pesos is worth in Cuban pesos — can you convert that for me?”
Small business cross-border pricing
“We invoice clients in ARS but need CUP amounts — what would 2500 Argentine pesos come out to in Cuban pesos?”
Quick single-unit rate check
“What's 1 Argentine peso worth in Cuban pesos right now?”
Technical details
Endpoint
POSThttps://api.fastapi.online/f/fx/ars/cup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need to convert Argentine Peso (ARS) to Cuban Peso (CUP) and are operating in an x402-enabled payment environment using USDC on Base. Best for agents that already handle x402 micropayments and need lightweight, per-call FX data for this specific currency pair without a full FX subscription.
Side effects
- Payment not submitted or invalid x402 micropayment header — 402 Payment Required returned
- Invalid or missing amount parameter — may default to 1 or return an error
- Upstream exchange rate data unavailable — service may return an error or stale data
- Amount of zero or negative value may produce unexpected output
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| amount | number | Amount of the source currency to convert (default 1) |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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