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FX Currency Rate Lookup
x402
FX Currency Rate Lookup is a paid API for AI agents from x402-canary.nicolas-x402-16f380a7.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns the current exchange rate between a base currency and a quote currency.
Price / call$0.01
Success—
StatusUnknown
How this service works
Free need-to-tool routing plus pay-per-call npm docs and TypeScript API signatures, npm breaking-change diffs, JavaScript-rendered browser snapshots and deterministic coding-agent checks via AgentCash/x402.
Output
Returns a JSON object with the base currency, quote currency, and the current exchange rate as a decimal number, along with metadata indicating the engine used for the rate lookup.
Example use cases
Travel budget currency check
“What is the current exchange rate from USD to Japanese Yen? I want to know how much my dollars are worth before my trip.”
Invoice pricing in foreign currency
“Can you get me the live exchange rate from GBP to EUR so I can price this invoice correctly for my European client?”
Crypto portfolio fiat valuation
“Look up the current USD to CAD exchange rate for me so I can figure out the Canadian dollar value of my holdings.”
Technical details
Endpoint
POSThttps://x402-canary.nicolas-x402-16f380a7.workers.dev/v1/fx/rateWhen to prefer
Use this endpoint when you need a quick, pay-per-call FX rate lookup between two currency pairs without managing an API key subscription. It is well-suited for AI agents that need on-demand currency conversion rates within automated workflows, especially when already operating within the x402 payment protocol ecosystem.
Side effects
- Unsupported or invalid currency code returns an error
- Missing base or quote parameter causes a 400-level error
- Payment not included or insufficient balance causes a 402 Payment Required response
- Temporary upstream FX data unavailability may result in a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| base | string | |
| quote | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"base": "USD",
"rate": 0.91,
"quote": "EUR"
},
"meta": {
"engine": "fx"
}
}
}Tags
x402
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