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x402 AI Gateway – FOX to USD Conversion
x402
x402 AI Gateway – FOX to USD Conversion is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0002/call, status unknown (last checked 2026-10-15).
Converts a specified amount of FOX (ShapeShift token) to its equivalent value in USD, gated behind an x402 micropayment of $0.0002 USDC 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 a JSON object containing the USD equivalent of the requested FOX token amount based on the current exchange rate.
Example use cases
Portfolio valuation in USD
“I hold 1500 FOX tokens — can you tell me what that's worth in USD today?”
Trade threshold check
“I want to know if my 300 FOX is worth more than $50 USD yet — can you convert it and check?”
Quick spot price lookup
“What's the current USD value of 1 FOX token?”
Technical details
Endpoint
POSThttps://api.fastapi.online/f/fx/aoa/usd?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, on-demand FOX-to-USD conversion and are operating in an x402-enabled agent context that can handle USDC micropayments on Base. Prefer this over manual price lookups when automating portfolio monitoring or trade triggers that need programmatic USD valuation of FOX holdings.
Side effects
- Payment not included or invalid x402 USDC micropayment — returns 402 Payment Required
- Amount parameter missing or non-numeric — may return 422 Unprocessable Entity
- Downstream price feed unavailable — returns 500 or empty result
- Network or gateway timeout — no response or 503
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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