Free static example · no wallet required
ECB reference FX conversion
Inspect the exact response envelope first. When you need current analysis for your own input, one successful x402 call costs $0.002 USDC on Base or Solana.
No accountNo subscriptionExact USDC priceFresh calls only are paid
Full response envelope
What you receive
Demonstration data only. The paid endpoint returns a fresh result and settlement receipt.
{
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
"service": "data.ecb-fx-reference",
"version": "1",
"data": {
"baseCurrency": "GBP",
"quoteCurrency": "USD",
"amount": "100",
"rate": "1.352573464976",
"inverseRate": "0.739331375259",
"convertedAmount": "135.2573465",
"referenceDate": "2026-08-18",
"requestedOnOrBefore": null,
"referenceLagDays": 1,
"basis": {
"denomination": "EUR",
"basePerEur": "0.85585",
"quotePerEur": "1.1576",
"formula": "quotePerEur / basePerEur",
"crossRateDerivedByApiAcre": true,
"rounding": "half-even; rate 12 decimal places, converted amount 8 decimal places"
},
"source": {
"provider": "European Central Bank",
"dataset": "EXR daily euro foreign exchange reference rates",
"seriesKeys": [
"EXR.D.GBP.EUR.SP00.A",
"EXR.D.USD.EUR.SP00.A"
],
"requestUrl": "https://data-api.ecb.europa.eu/service/data/EXR/D.GBP+USD.EUR.SP00.A?format=csvdata&detail=dataonly&lastNObservations=10",
"documentationUrl": "https://data.ecb.europa.eu/help/api/data-examples",
"reusePolicyUrl": "https://www.ecb.europa.eu/stats/ecb_statistics/governance_and_quality_framework/html/usage_policy.en.html",
"disclaimerUrl": "https://www.ecb.europa.eu/services/using-our-site/disclaimer/html/index.en.html",
"attribution": "Source: ECB statistics.",
"freeSourceNotice": "The underlying ECB statistics are available free of charge from the ECB Data Portal. API Acre charges for bounded retrieval, validation, derived calculation, and x402 delivery\u2014not for exclusive access to those statistics.",
"statisticsModified": false,
"derivedValuesClearlyLabelled": true
},
"retrievedAt": "2026-08-19T04:00:00+00:00",
"networkRequestsMade": 1,
"warnings": [
"The latest common reference observation is 1 calendar day(s) before the requested cutoff, which can occur on weekends and ECB holidays.",
"API Acre derived this cross rate by dividing two unmodified ECB euro reference rates; the cross rate and converted amount are calculated values."
],
"limitations": [
"ECB reference rates are usually published on TARGET business days and are not live, executable, bid, ask, card, cash, remittance, or settlement quotes.",
"A converted amount is arithmetic evidence only; banks, exchanges, spreads, fees, taxes, and payment timing can produce a different result.",
"ECB observations can be revised, interrupted, or withdrawn; inspect referenceDate and requestUrl before relying on a result.",
"Coverage is limited to the explicitly supported active ECB reference-rate currencies published in the input schema."
],
"disclaimer": "Reference data only, not financial advice or a guarantee of an available exchange rate. Source: ECB statistics."
},
"meta": {
"duration_ms": 42,
"cached": false,
"sources": [],
"warnings": [],
"next_actions": []
}
}Example request
Input JSON
{
"base_currency": "GBP",
"quote_currency": "USD",
"amount": "100",
"on_or_before": null
}Delivery contract
One paid POST
Convert an amount between two supported currencies using one validated ECB daily reference-rate observation. The underlying ECB statistics are available free from the ECB Data Portal; the fee covers bounded retrieval, validation, clearly labelled cross-rate calculation, and x402 delivery.
POST /v1/data/ecb-fx-reference
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