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x402 AI Gateway – Currency Amount Converter
x402
x402 AI Gateway – Currency Amount 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 of one currency to another via a self-hosted AI gateway, gated by a USDC micropayment on Base via x402.
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
A JSON object containing the converted currency amount and potentially the exchange rate or conversion details for the specified source amount.
Example use cases
Travel budget currency check
“I'm heading to Japan next month with a budget of 1500 USD — how much is that in Japanese yen right now?”
Invoice amount conversion
“I need to bill a client in euros, but the contract says 5000 Canadian dollars — what's the equivalent amount in EUR?”
Quick forex sanity check
“Convert 1 GBP to USD for me so I can see the current exchange rate before I wire money abroad.”
Technical details
Endpoint
POSThttps://api.fastapi.online/f/fx/ang/jod?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a micropayment-gated, self-hosted currency conversion that supports x402 USDC payments on Base — particularly useful in autonomous agent pipelines that already handle x402 payment flows and need lightweight per-call billing rather than subscription-based FX APIs.
Side effects
- Payment failure: x402 micropayment of 0.0002 USDC not completed or rejected — endpoint returns 402 Payment Required
- Invalid amount: non-numeric or negative amount value returns a validation error
- Missing amount: omitting the amount field may default to 1 but could return an error depending on server state
- Service unavailability: self-hosted instance may be offline, returning 5xx errors
- Unsupported currency pair: requested currency pair not supported by the underlying model or data source
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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