Polygon Options Chain Scan

arazzo: 1.0.1
info:
  title: Polygon Options Chain Scan
  summary: Resolve an underlying's details, scan its options chain, and read its previous close.
  description: >-
    A chain-level options flow that frames a full options chain against its
    underlying equity. The workflow resolves the underlying ticker's
    reference details, scans the options chain snapshot filtered by contract
    type and expiration, and reads the underlying stock's previous-close so
    the chain can be evaluated relative to the latest underlying session.
    Every step spells out its request inline so the flow can be read and
    executed without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: referenceApi
  url: ../openapi/polygon-reference-openapi.yml
  type: openapi
- name: optionsApi
  url: ../openapi/polygon-options-openapi.yml
  type: openapi
- name: stocksApi
  url: ../openapi/polygon-stocks-openapi.yml
  type: openapi
workflows:
- workflowId: options-chain-scan
  summary: Scan an options chain against its underlying's details and previous close.
  description: >-
    Resolves the underlying details, scans the options chain snapshot, and
    reads the underlying stock's previous-close.
  inputs:
    type: object
    required:
    - underlyingTicker
    - contractType
    - expirationDate
    properties:
      underlyingTicker:
        type: string
        description: The underlying ticker symbol (e.g. AAPL).
      contractType:
        type: string
        description: The contract type to filter the chain on (call or put).
      expirationDate:
        type: string
        description: The expiration date to filter the chain on (YYYY-MM-DD).
      limit:
        type: integer
        description: Maximum number of chain contracts to return.
        default: 50
  steps:
  - stepId: resolveUnderlying
    description: >-
      Resolve detailed reference information for the underlying ticker to
      confirm it exists and capture its name.
    operationId: getTickerDetails
    parameters:
    - name: ticker
      in: path
      value: $inputs.underlyingTicker
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      name: $response.body#/results/name
      market: $response.body#/results/market
  - stepId: scanChain
    description: >-
      Scan the options chain snapshot for the underlying filtered by
      contract type and expiration date.
    operationId: getOptionsChainSnapshot
    parameters:
    - name: underlyingAsset
      in: path
      value: $inputs.underlyingTicker
    - name: contract_type
      in: query
      value: $inputs.contractType
    - name: expiration_date
      in: query
      value: $inputs.expirationDate
    - name: limit
      in: query
      value: $inputs.limit
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      chain: $response.body#/results
  - stepId: getUnderlyingPreviousClose
    description: >-
      Read the underlying stock's previous-close so the chain can be
      evaluated relative to the latest underlying session.
    operationId: getStocksPreviousClose
    parameters:
    - name: stocksTicker
      in: path
      value: $inputs.underlyingTicker
    - name: adjusted
      in: query
      value: true
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      previousClose: $response.body#/results/0/c
  outputs:
    name: $steps.resolveUnderlying.outputs.name
    chain: $steps.scanChain.outputs.chain
    underlyingPreviousClose: $steps.getUnderlyingPreviousClose.outputs.previousClose