openapi: 3.1.0
info:
  title: EODHD Financial Data Calendar CBOE API
  description: Comprehensive API for retrieving financial data including stock prices, fundamentals, calendar events, news, and more from EOD Historical Data (eodhd.com)
  version: 2.0.0
  contact:
    name: EODHD Support
    url: https://eodhd.com
    email: supportlevel1@eodhistoricaldata.com
  termsOfService: https://eodhd.com/financial-apis/terms-conditions
  license:
    name: Proprietary
    url: https://eodhd.com/financial-apis/terms-conditions
servers:
- url: https://eodhd.com/api
  description: Primary API path
- url: https://eodhistoricaldata.com/api
  description: Alternative API path
security:
- EODHDQueryKey: []
tags:
- name: CBOE
  description: CBOE index data and listings
paths:
  /cboe/index:
    get:
      summary: Get CBOE index historical data
      description: Returns historical end-of-day data for a specific CBOE index, including daily open, high, low, close values.
      operationId: GetCBOEIndexData
      parameters:
      - name: api_token
        in: query
        required: true
        description: API token for authentication.
        schema:
          type: string
      - name: filter[index_code]
        in: query
        required: true
        description: CBOE index code (e.g., 'VIX', 'SPX').
        schema:
          type: string
      - name: filter[feed_type]
        in: query
        required: true
        description: Feed type filter.
        schema:
          type: string
      - name: filter[date]
        in: query
        required: true
        description: Date filter in 'YYYY-MM-DD' format.
        schema:
          type: string
          format: date
      - name: filter[include_review]
        in: query
        required: false
        description: Include review data.
        schema:
          type: string
      - name: fmt
        in: query
        required: false
        description: Output format.
        schema:
          type: string
          enum:
          - json
          - csv
          default: json
      responses:
        '200':
          description: Successfully retrieved CBOE index data.
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  properties:
                    date:
                      type: string
                      format: date
                      description: Trading date.
                    open:
                      type: number
                      description: Opening value.
                    high:
                      type: number
                      description: High value.
                    low:
                      type: number
                      description: Low value.
                    close:
                      type: number
                      description: Closing value.
                    volume:
                      type: number
                      description: Trading volume (if applicable).
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized. Invalid API token.
        '404':
          description: Index not found.
      tags:
      - CBOE
  /cboe/indices:
    get:
      summary: List CBOE indices
      description: Returns a list of all available CBOE indices with their latest values and metadata.
      operationId: GetCBOEIndices
      parameters:
      - name: api_token
        in: query
        required: true
        description: API token for authentication.
        schema:
          type: string
      - name: fmt
        in: query
        required: false
        description: Output format.
        schema:
          type: string
          enum:
          - json
          default: json
      responses:
        '200':
          description: Successfully retrieved CBOE indices list.
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  properties:
                    code:
                      type: string
                      description: Index symbol code.
                    name:
                      type: string
                      description: Index name.
                    last_value:
                      type: number
                      description: Latest index value.
                    change:
                      type: number
                      description: Change from previous close.
                    change_p:
                      type: number
                      description: Percentage change.
                    last_update:
                      type: string
                      format: date
                      description: Date of last update.
        '401':
          description: Unauthorized. Invalid API token.
        '429':
          description: Too Many Requests.
      tags:
      - CBOE
components:
  securitySchemes:
    EODHDQueryKey:
      type: apiKey
      in: query
      name: api_token
      description: EODHD API key (stored as a secret in ChatGPT).