---
title: "ECB reference FX conversion"
method: POST
path: "/v1/data/ecb-fx-reference"
tags: ["data"]
---

# ECB reference FX conversion

`POST /v1/data/ecb-fx-reference`

## Request

- Base URL: `https://apiacre.com`
- URL: `https://apiacre.com/v1/data/ecb-fx-reference`
- Auth: none required

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.

Price: **$0.002 USDC** via x402 exact payment on Base and Solana.

## Request body

- EcbFxReferenceInput
  - `base_currency` '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', required: Three-letter currency converted from, for example GBP
  - `quote_currency` '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', required: Three-letter currency converted to, for example USD
  - `amount` string: Positive decimal amount with at most 15 integer and 8 fractional digits
  - `on_or_before` string, date, nullable: Optional date whose latest available ECB reference observation is used; omit for the latest available common business day

## Response `200`

Successful Response

- ServiceResponse
  - `request_id` string, required
  - `service` string, required
  - `version` string
  - `data` object, required
  - `meta` ServiceMeta, required
    - `duration_ms` integer, required
    - `cached` boolean
    - `sources` string[]
    - `warnings` string[]
    - `next_actions` ServiceNextAction[]
      - `service` string, required
      - `title` string, required
      - `reason` string, required
      - `method` 'POST'
      - `path` string, required
      - `price` string, required
      - `input_template` object, required
      - `use_output` string, required
      - `handoff_path` string, required
      - `checkout_path` string, required
      - `sample_path` string, nullable, required
      - `maximum_atomic_usdc` string, required
      - `handoff_payment_required` false
      - `executes_automatically` false
      - `authorization_required` boolean

## Other responses

- `402`: Payment Required. Decode PAYMENT-REQUIRED, satisfy the x402 requirement, and retry with PAYMENT-SIGNATURE.
- `422`: Validation Error

---

[API](https://skmtc.dev/apiacre/apis/api-acre.md) · [All operations](https://skmtc.dev/apiacre/apis/api-acre/llms.txt) · [OpenAPI document](https://skmtc.dev/apiacre/apis/api-acre/revisions/0ba942b920ad?raw)