ExchangeRate-API Codes to Conversion

arazzo: 1.0.1
info:
  title: ExchangeRate-API Codes to Conversion
  summary: Discover supported currencies, pull latest rates, then convert a specific pair.
  description: >-
    A discovery-to-conversion flow that grounds a currency conversion in the
    provider's own supported-codes list. It first retrieves the full list of
    supported ISO 4217 currency codes, then fetches the latest rates for the
    chosen base currency, and finally requests a direct pair conversion between
    the base and a target currency. Each step spells out its request inline,
    including the API key path parameter, so the flow can be read and executed
    without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: exchangeRateApi
  url: ../openapi/exchangerate-api-openapi.yml
  type: openapi
workflows:
- workflowId: codes-to-conversion
  summary: Resolve supported codes, fetch latest rates, and convert a currency pair.
  description: >-
    Confirms the base and target currencies are supported, retrieves the latest
    rate table for the base currency, and then performs a direct base-to-target
    pair conversion.
  inputs:
    type: object
    required:
    - apiKey
    - baseCode
    - targetCode
    properties:
      apiKey:
        type: string
        description: Your ExchangeRate-API dashboard API key.
      baseCode:
        type: string
        description: ISO 4217 three-letter base currency code (e.g. USD).
      targetCode:
        type: string
        description: ISO 4217 three-letter target currency code (e.g. EUR).
  steps:
  - stepId: listSupportedCodes
    description: >-
      Retrieve the full list of supported ISO 4217 currency codes and their
      names to confirm the requested currencies are available.
    operationId: getSupportedCodes
    parameters:
    - name: api_key
      in: path
      value: $inputs.apiKey
    successCriteria:
    - condition: $statusCode == 200
    - condition: $response.body#/result == "success"
    outputs:
      supportedCodes: $response.body#/supported_codes
  - stepId: getLatest
    description: >-
      Fetch the latest exchange rates from the base currency to all supported
      currencies.
    operationId: getLatestRates
    parameters:
    - name: api_key
      in: path
      value: $inputs.apiKey
    - name: base_code
      in: path
      value: $inputs.baseCode
    successCriteria:
    - condition: $statusCode == 200
    - condition: $response.body#/result == "success"
    outputs:
      baseCode: $response.body#/base_code
      conversionRates: $response.body#/conversion_rates
      lastUpdate: $response.body#/time_last_update_utc
  - stepId: convertPair
    description: >-
      Request the direct exchange rate between the base and target currency.
    operationId: getPairConversion
    parameters:
    - name: api_key
      in: path
      value: $inputs.apiKey
    - name: base_code
      in: path
      value: $inputs.baseCode
    - name: target_code
      in: path
      value: $inputs.targetCode
    successCriteria:
    - condition: $statusCode == 200
    - condition: $response.body#/result == "success"
    outputs:
      conversionRate: $response.body#/conversion_rate
      targetCode: $response.body#/target_code
  outputs:
    supportedCodes: $steps.listSupportedCodes.outputs.supportedCodes
    conversionRates: $steps.getLatest.outputs.conversionRates
    conversionRate: $steps.convertPair.outputs.conversionRate