Convert an amount between two supported currencies using one validated ECB daily reference
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.
2000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-01
updated
Provider
apiacre.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xa0BFa4f07281c9b248DC3AED2217836BcA24869B",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "2000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "B4CHWQeQn7GDLZD2aW6hpGG2bEseisBFLZYECA3HDLan",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "2000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"amount": "100",
"base_currency": "GBP",
"on_or_before": null,
"quote_currency": "USD"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"data": {
"amount": "100",
"baseCurrency": "GBP",
"basis": {
"basePerEur": "0.85585",
"denomination": "EUR",
"formula": "quotePerEur / basePerEur",
"quotePerEur": "1.1576"
},
"convertedAmount": "135.2573465",
"disclaimer": "Reference data only, not financial advice or a guarantee ...",
"inverseRate": "0.739331375259",
"limitations": [
"ECB reference rates are usually published on TARGET busin...",
"A converted amount is arithmetic evidence only; banks, ex...",
"ECB observations can be revised, interrupted, or withdraw...",
"Coverage is limited to the explicitly supported active EC..."
],
"networkRequestsMade": 1,
"quoteCurrency": "USD",
"rate": "1.352573464976",
"referenceDate": "2026-08-18",
"referenceLagDays": 1,
"requestedOnOrBefore": null,
"retrievedAt": "2026-08-19T04:00:00+00:00",
"source": {
"dataset": "EXR daily euro foreign exchange reference rates",
"provider": "European Central Bank",
"requestUrl": "https://data-api.ecb.europa.eu/service/data/EXR/D.GBP+USD...",
"seriesKeys": [
"EXR.D.GBP.EUR.SP00.A",
"EXR.D.USD.EUR.SP00.A"
]
},
"warnings": [
"The latest common reference observation is 1 calendar day...",
"API Acre derived this cross rate by dividing two unmodifi..."
]
},
"meta": {
"cached": false,
"duration_ms": 42,
"next_actions": [],
"sources": [],
"warnings": []
},
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
"service": "data.ecb-fx-reference",
"version": "1"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"amount": {
"type": "string"
},
"base_currency": {
"enum": [
"AUD",
"BRL",
"CAD",
"CHF",
"CNY",
"CZK",
"DKK",
"EUR",
"GBP",
"HKD",
"HUF",
"IDR",
"ILS",
"INR",
"ISK",
"JPY",
"KRW",
"MXN",
"MYR",
"NOK",
"NZD",
"PHP",
"PLN",
"RON",
"SEK",
"SGD",
"THB",
"TRY",
"USD",
"ZAR"
],
"type": "string"
},
"on_or_before": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"quote_currency": {
"enum": [
"AUD",
"BRL",
"CAD",
"CHF",
"CNY",
"CZK",
"DKK",
"EUR",
"GBP",
"HKD",
"HUF",
"IDR",
"ILS",
"INR",
"ISK",
"JPY",
"KRW",
"MXN",
"MYR",
"NOK",
"NZD",
"PHP",
"PLN",
"RON",
"SEK",
"SGD",
"THB",
"TRY",
"USD",
"ZAR"
],
"type": "string"
}
},
"required": [
"base_currency",
"quote_currency"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"additionalProperties": false,
"properties": {
"amount": {
"type": "string"
},
"baseCurrency": {
"type": "string"
},
"basis": {
"type": "object"
},
"convertedAmount": {
"type": "string"
},
"disclaimer": {
"type": "string"
},
"inverseRate": {
"type": "string"
},
"limitations": {
"items": {
"type": "string"
},
"type": "array"
},
"networkRequestsMade": {
"type": "integer"
},
"quoteCurrency": {
"type": "string"
},
"rate": {
"type": "string"
},
"referenceDate": {
"type": "string"
},
"referenceLagDays": {
"type": "integer"
},
"requestedOnOrBefore": {
"type": [
"string",
"null"
]
},
"retrievedAt": {
"type": "string"
},
"source": {
"type": "object"
},
"warnings": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"baseCurrency",
"quoteCurrency",
"amount",
"rate",
"inverseRate",
"convertedAmount",
"referenceDate",
"requestedOnOrBefore",
"referenceLagDays",
"basis",
"source",
"retrievedAt",
"networkRequestsMade",
"warnings",
"limitations",
"disclaimer"
],
"type": "object"
},
"meta": {
"properties": {
"cached": {
"type": "boolean"
},
"duration_ms": {
"type": "integer"
},
"next_actions": {
"items": {
"type": "object"
},
"type": "array"
},
"sources": {
"items": {
"type": "string"
},
"type": "array"
},
"warnings": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"duration_ms",
"cached",
"sources",
"warnings",
"next_actions"
],
"type": "object"
},
"request_id": {
"type": "string"
},
"service": {
"type": "string"
},
"version": {
"type": "string"
}
},
"required": [
"request_id",
"service",
"version",
"data",
"meta"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
}
}Use it
curl
curl "https://apiacre.com/v1/data/ecb-fx-reference" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://apiacre.com/v1/data/ecb-fx-reference");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://apiacre.com/v1/data/ecb-fx-reference")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/2573.json, and this resource appears in /discovery/resources and /discovery/search.