CurrencyAPI Historical API

openapi: 3.0.3
info:
  title: Currency Convert Historical API
  description: CurrencyAPI (currencyapi.com, an Everapi product) is a foreign exchange rate and currency conversion REST API. A single versioned surface at https://api.currencyapi.com/v3 provides the latest exchange rates, historical end-of-day rates back to 1999, time-series ranges with day/hour/quarter-hour/ minute accuracy, value conversion, currency metadata, and account quota status. All endpoints are GET requests authenticated with an API key passed either as an "apikey" HTTP header (recommended) or an "apikey" query parameter. Only successful calls count against your quota; the status endpoint is never counted.
  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: Historical
  description: End-of-day historical exchange rates back to 1999.
paths:
  /historical:
    get:
      operationId: getHistoricalExchangeRates
      tags:
      - Historical
      summary: Historical exchange rates
      description: Returns end-of-day exchange rates for a specific date. Historical data extends back to 1999.
      parameters:
      - name: date
        in: query
        required: true
        description: 'Date to retrieve historical rates from (format: 2021-12-31).'
        schema:
          type: string
          format: date
          example: '2022-01-01'
      - $ref: '#/components/parameters/baseCurrency'
      - $ref: '#/components/parameters/currencies'
      - $ref: '#/components/parameters/type'
      responses:
        '200':
          description: Historical exchange rates for the requested date.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RatesResponse'
              example:
                meta:
                  last_updated_at: '2022-01-01T23:59:59Z'
                data:
                  AED:
                    code: AED
                    value: 3.67306
        '401':
          $ref: '#/components/responses/Unauthorized'
        '422':
          $ref: '#/components/responses/ValidationError'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  schemas:
    Rate:
      type: object
      properties:
        code:
          type: string
          description: ISO currency code.
          example: EUR
        value:
          type: number
          description: Exchange rate value relative to the base currency.
          example: 0.91234
    RatesResponse:
      type: object
      properties:
        meta:
          type: object
          properties:
            last_updated_at:
              type: string
              format: date-time
        data:
          type: object
          description: Exchange rate objects keyed by currency code.
          additionalProperties:
            $ref: '#/components/schemas/Rate'
    Error:
      type: object
      properties:
        message:
          type: string
        errors:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
  responses:
    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'
    Unauthorized:
      description: Invalid or missing API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  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
    baseCurrency:
      name: base_currency
      in: query
      required: false
      description: The base currency to which all results are behaving relative to. Defaults to USD.
      schema:
        type: string
        default: USD
        example: USD
  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).