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x402 AI Gateway — Currency Conversion
x402
x402 AI Gateway — Currency Conversion is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0002/call, status unknown (last checked 2026-10-11).
Converts a specified amount of one currency (XCD source) to another via a micropayment-gated AI gateway endpoint.
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 converted currency value or exchange result for the specified amount from XCD to AOA, gated behind a $0.0002 USDC micropayment on Base.
Example use cases
Travel budget currency check
“I'm heading to Angola and have 200 XCD — how much Angolan Kwanza will that get me?”
Small business cross-border pricing
“I need to price a product in AOA that costs 15 XCD — can you do that currency conversion for me?”
Default single-unit rate lookup
“What's the current conversion rate for 1 XCD into AOA?”
Technical details
Endpoint
POSThttps://api.fastapi.online/f/fx/aoa/xcd?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need XCD-to-AOA currency conversion via a pay-per-call micropayment model (x402/USDC on Base), especially in autonomous agent workflows where you want to pay only for actual conversions without a subscription.
Side effects
- Payment not provided or insufficient — returns HTTP 402 requiring x402 micropayment before execution
- Invalid or missing amount field — returns validation error
- Upstream exchange rate service unavailable — returns 5xx error
- Unsupported currency pair — may return empty or error response
- Network timeout on self-hosted infrastructure
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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