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x402 AI Gateway — FX/HKD Currency Converter
x402
x402 AI Gateway — FX/HKD 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 (likely foreign exchange to HKD) using a micropayment-gated AI API endpoint, returning the converted value.
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 amount in HKD, likely including the source amount, exchange rate applied, and the resulting HKD value.
Example use cases
Travel budget in HKD
“I'm heading to Hong Kong and want to know how much HKD I'll get if I convert 2000 euros — can you calculate that for me?”
Invoice amount in local currency
“I need to bill a client in Hong Kong. Convert 1500 US dollars to HKD so I know what amount to put on the invoice.”
Comparing FX rates for remittance
“I want to send money to Hong Kong — what would 800 British pounds convert to in HKD right now?”
Technical details
Endpoint
POSThttps://api.fastapi.online/f/fx/ang/hkd?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, low-cost ($0.0002 USDC) FX conversion to HKD and are operating in an x402-enabled micropayment environment on Base. Ideal for agents that need programmatic currency lookups without a subscription-based FX API key.
Side effects
- Missing or invalid amount parameter returns an error or default of 1
- Payment not completed (x402 micropayment required before execution)
- Unsupported source currency returns an error
- Exchange rate data unavailable or stale
- Malformed request body returns HTTP 422 or 400
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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