> ## Documentation Index
> Fetch the complete documentation index at: https://docs.etherfuse.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List exchange rates

> Returns current USD exchange rates for all supported currencies, each keyed by
`usd_to_<currency>` with a per-provider `sources` breakdown.

Public. No API key required.



## OpenAPI

````yaml openapi-v2.json GET /lookup/exchange_rate
openapi: 3.1.0
info:
  title: Etherfuse FX API
  description: >-
    Partner-facing ramp API, version 2: payment accounts, quotes, orders and
    webhooks.
  license:
    name: Proprietary
  version: 2.0.0
servers:
  - url: https://api.sand.etherfuse.com
    description: Sandbox
security:
  - ApiKeyAuth: []
tags:
  - name: Payment Accounts
    description: >-
      Register the bank accounts and wallets that money moves from and to, and
      read their readiness per rail.
  - name: Quotes
    description: Price a transfer between two registered payment accounts.
  - name: Orders
    description: Create orders from quotes and track them.
  - name: Webhook Subscriptions
    description: Subscribe to webhook events.
  - name: Webhook Events
    description: Payloads Etherfuse sends to your webhook subscriptions.
  - name: Sandbox
    description: Endpoints that work only in sandbox, for testing.
  - name: Assets
    description: The markets and tokens a quote can use, and the balances of a wallet.
  - name: Authentication
    description: >-
      Partner JWT authentication: exchange a JWT for an access token, or launch
      a user into the app.
  - name: KYC
    description: >-
      Submit a customer's verification data, documents and questionnaire
      answers, import a verification they already passed elsewhere, and check
      where their KYC stands.
  - name: KYB
    description: Check where a business organization's KYB stands.
  - name: Lookup
    description: >-
      Public reference data: exchange rates, stablebonds, bond costs, country
      codes.
  - name: Organizations
    description: >-
      Your organization, your default partner fee, and the customer
      organizations you create.
  - name: Members
    description: >-
      The people who belong to a customer business organization and complete its
      KYB.
  - name: Statements
    description: >-
      Monthly revenue share statements for closed months, as a list or as a CSV
      or PDF download.
paths:
  /lookup/exchange_rate:
    get:
      tags:
        - Lookup
      summary: List exchange rates
      description: >-
        Returns current USD exchange rates for all supported currencies, each
        keyed by

        `usd_to_<currency>` with a per-provider `sources` breakdown.


        Public. No API key required.
      operationId: exchange_rates
      parameters:
        - name: max_age
          in: query
          description: >-
            Maximum age of a source in seconds. Sources whose `updated_at`
            timestamp

            is older than `now - max_age` are excluded from the `sources` map.

            When omitted, all sources are returned regardless of age.
          required: false
          schema:
            type:
              - integer
              - 'null'
            format: int64
            minimum: 0
      responses:
        '200':
          description: All exchange rates keyed by `usd_to_<currency>`
          content:
            application/json:
              schema: {}
              example:
                usd_to_brl:
                  rate: '4.97'
                  sources:
                    provider_1:
                      rate: '4.97'
                      updated_at: 1709510400
                  updated_at: 1709510400
                usd_to_mxn:
                  rate: '17.15'
                  sources:
                    provider_1:
                      rate: '17.15'
                      updated_at: 1709510400
                  updated_at: 1709510400
      security:
        - {}
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
      description: API key sent in the Authorization header, with no `Bearer` prefix.

````

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