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x402 AI Gateway — Currency Converter
x402
x402 AI Gateway — 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 one currency to another, requiring a micropayment in USDC on Base before executing.
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 amount and likely exchange rate details for the requested source amount and currency pair.
Example use cases
Travel budget currency planning
“I'm traveling to Japan next month — can you convert 500 USD to Japanese yen so I know roughly how much spending money I'll have?”
E-commerce international pricing
“I need to know how much 89.99 euros is in British pounds for a product I'm listing in the UK store.”
Freelance invoice conversion
“My client is paying me 2000 Canadian dollars — how much is that in US dollars so I can invoice correctly?”
Technical details
Endpoint
POSThttps://api.fastapi.online/f/fx/ang/mvr?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a pay-per-call currency conversion within an x402-enabled micropayment workflow on Base/USDC, or when integrating currency conversion into an autonomous agent that already handles x402 payment flows. It is a self-hosted, low-cost option at $0.0002 per call.
Side effects
- Invalid or unsupported currency code returns an error
- Payment failure or insufficient USDC balance blocks execution with a 402 response
- Amount of 0 or negative values may return a validation error
- Network or gateway timeout results in a failed request
- Unsupported currency pairs may return null or error response
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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