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OpenAPI Specification

openapi: 3.2.0
info:
  title: Frankfurter Currency API
  description: Frankfurter is an open-source API for current and historical foreign exchange rates published by central banks.
  version: 2.1.1
  license:
    name: MIT
    url: https://github.com/lineofflight/frankfurter/blob/main/LICENSE
  contact:
    url: https://github.com/lineofflight/frankfurter/issues
servers:
- url: https://api.frankfurter.dev/v2
tags:
- name: Currency
paths:
  /currency/{code}:
    get:
      operationId: getCurrency
      summary: Get a single currency
      description: Returns details for a single currency, including provider information or peg metadata.
      parameters:
      - name: code
        in: path
        required: true
        schema:
          type: string
          example: USD
      responses:
        '200':
          description: Currency details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CurrencyDetail'
              example:
                iso_code: USD
                iso_numeric: '840'
                name: United States Dollar
                symbol: $
                providers:
                - ECB
                - BOC
                - FED
        '404':
          $ref: '#/components/responses/NotFound'
      tags:
      - Currency
components:
  responses:
    NotFound:
      description: No data found
      content:
        application/json:
          schema:
            type: object
            properties:
              message:
                type: string
  schemas:
    CurrencyDetail:
      type: object
      properties:
        iso_code:
          type: string
          description: Currency or accounting unit code
        iso_numeric:
          type:
          - string
          - 'null'
          description: ISO 4217 numeric code
        name:
          type: string
          description: Full currency name
        symbol:
          type:
          - string
          - 'null'
          description: Currency symbol
        providers:
          type: array
          items:
            type: string
          description: Provider keys that publish this currency
        peg:
          type: object
          properties:
            base:
              type: string
            rate:
              type: number
            authority:
              type: string
            source:
              type: string
              format: uri
          description: Peg metadata, present only for pegged currencies
      required:
      - iso_code
      - name