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SignalHarness FX Rate — EUR Currency Exchange Rate Lookup
x402
SignalHarness FX Rate — EUR Currency Exchange Rate Lookup is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Returns the current foreign exchange rate for EUR against a specified quote currency, with sourcing and attribution metadata.
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object with the exchange rate (as a decimal), the currency pair symbol (e.g. EUR/USD), the as-of date, the retrieval timestamp, and a source block containing the data provider name, dataset, notice, source URL, free-access URL, and attribution string. Also includes a warnings array and a signed payment receipt confirming the $0.005 USDC charge.
Example use cases
Real-time EUR/USD rate for invoicing
“I'm generating a USD invoice for a European client — can you pull the current EUR to USD exchange rate so I can calculate the right amount?”
Portfolio currency exposure check
“I hold some EUR-denominated assets and I need to know the latest EUR to GBP rate to assess my currency exposure.”
Travel budget conversion
“I'm planning a trip to Japan — what's the current EUR to JPY exchange rate so I can figure out my budget?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/fx_rate/invokeWhen to prefer
Choose this endpoint when you need a current EUR-based exchange rate with verifiable source attribution and a programmatic payment trail via x402/USDC micropayments. It is ideal for agent workflows requiring auditable FX data with provenance metadata (source URL, provider, dataset) rather than a raw rate alone. The base currency is fixed to EUR, so it is best suited for EUR-centric conversion tasks.
Side effects
- Invalid quote currency code (not a 3-letter uppercase ISO code) returns a validation error
- Unsupported or exotic quote currency may return no rate or a warning
- Payment failure or insufficient USDC balance results in 402 Payment Required
- Rate data unavailable for a currency pair returns an error or empty result
- Network timeout or upstream provider outage causes a failed status in receipt
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| base | string | |
| quote | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"asOf": "2026-09-12",
"base": "USD",
"rate": 1e-8,
"quote": "USD",
"source": {
"notice": "example",
"dataset": "example",
"provider": "example",
"sourceUrl": "https://example.com/resource",
"attribution": "example",
"retrievedAt": "example0000000000000",
"freeAccessUrl": "https://example.com/resource"
},
"symbol": "EUR/USD",
"warnings": [
"Verify the caller-supplied data before relying on this result."
],
"retrievedAt": "example0000000000000"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "fx_rate",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "25e3fc8841d599b8bec2cbd505aef3d65fa838ca00b1dd57d377ca9d323ec348",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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