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OpenAPI Specification

openapi: 3.2.0
info:
  title: Currency Currencies API
  description: CurrencyAPI (currencyapi.com, an Everapi product) is a foreign exchange rate and currency conversion REST API.
  version: '3.0'
  contact:
    name: CurrencyAPI
    url: https://currencyapi.com
  termsOfService: https://currencyapi.com/terms
servers:
- url: https://api.currencyapi.com/v3
  description: Production
security:
- apiKeyHeader: []
- apiKeyQuery: []
tags:
- name: Currencies
  description: Supported currency metadata.
paths:
  /currencies:
    get:
      operationId: listCurrencies
      tags:
      - Currencies
      summary: List supported currencies
      description: Returns metadata for all supported currencies - symbol, name, native symbol, decimal digits, rounding, code, plural name, type, and associated countries - optionally filtered by code or type.
      parameters:
      - $ref: '#/components/parameters/currencies'
      - $ref: '#/components/parameters/type'
      responses:
        '200':
          description: Supported currency metadata keyed by currency code.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: object
                    additionalProperties:
                      $ref: '#/components/schemas/Currency'
              example:
                data:
                  USD:
                    symbol: $
                    name: US Dollar
                    symbol_native: $
                    decimal_digits: 2
                    rounding: 0
                    code: USD
                    name_plural: US dollars
                    type: fiat
                    countries:
                    - US
        '401':
          $ref: '#/components/responses/Unauthorized'
        '422':
          $ref: '#/components/responses/ValidationError'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  responses:
    Unauthorized:
      description: Invalid or missing API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    RateLimited:
      description: Monthly quota or per-minute rate limit exceeded. Inspect the X-RateLimit-Limit-Quota-Minute, X-RateLimit-Limit-Quota-Month, X-RateLimit-Remaining-Quota-Minute, and X-RateLimit-Remaining-Quota-Month response headers to monitor consumption.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    ValidationError:
      description: Validation error - incorrect or missing parameters. Failed requests do not count against your quota.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      properties:
        message:
          type: string
        errors:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
    Currency:
      type: object
      properties:
        symbol:
          type: string
        name:
          type: string
        symbol_native:
          type: string
        decimal_digits:
          type: integer
        rounding:
          type: number
        code:
          type: string
        name_plural:
          type: string
        type:
          type: string
          enum:
          - fiat
          - metal
          - crypto
        countries:
          type: array
          items:
            type: string
  parameters:
    currencies:
      name: currencies
      in: query
      required: false
      description: A list of comma-separated currency codes you want to receive (e.g. EUR,USD,CAD). Defaults to all available currencies.
      schema:
        type: string
        example: EUR,USD,CAD
    type:
      name: type
      in: query
      required: false
      description: The type of currency you want to get. Defaults to all types.
      schema:
        type: string
        enum:
        - fiat
        - metal
        - crypto
  securitySchemes:
    apiKeyHeader:
      type: apiKey
      in: header
      name: apikey
      description: API key passed as an HTTP header (recommended).
    apiKeyQuery:
      type: apiKey
      in: query
      name: apikey
      description: API key passed as a query parameter (may expose the key in access logs).