Alphanume Optionable Tickers API

openapi: 3.2.0
info:
  contact:
    url: https://alphanume.com
  description: 'Point-in-time, survivorship-aware datasets for US equities and options research. Every response is JSON: {"count": N, "data": [...]} (paginated endpoints add has_more and next_cursor). Dates are always YYYY-MM-DD. Access: every dataset requires an Alphanume Pro API key (the Free plan is retired as of September 6, 2026). A 403 error with code PRO_SUBSCRIPTION_REQUIRED or DATE_RANGE_RESTRICTED means the key''s plan does not cover the request -- it does not mean the data is missing. Authentication: send your API key in the X-API-Key header (or Authorization: Bearer). Rate limit: 600 requests/minute. Keys come with a Pro subscription at https://alphanume.com/pricing. The same datasets are available as MCP tools at https://mcp.alphanume.com/mcp.'
  title: Alphanume Optionable Tickers API
  version: 1.1.0
servers:
- url: https://api.alphanume.com
security:
- ApiKeyHeader: []
- BearerKey: []
tags:
- name: Optionable Tickers
paths:
  /v1/optionable-tickers:
    get:
      description: 'Historical optionable universe: point-in-time snapshots of which US equities had

        listed options on each snapshot date, with the average number of days between

        listed expirations (avg_days_between -- lower means a denser expiration calendar)

        and a has_weeklies flag. Essential for honest options backtests: it tells you what

        was actually tradable *then*, not what is optionable today.


        Filter by snapshot date range; omit filters for the most recent snapshots first.

        Pagination: results are capped at 50,000 rows

        per request; when the response has has_more=true, pass next_cursor''s date and

        ticker back as cursor_date and cursor_ticker to fetch the next page.


        Requires an Alphanume Pro API key. A 403 PRO_SUBSCRIPTION_REQUIRED or

        DATE_RANGE_RESTRICTED error means the key''s plan does not cover the request --

        it does not mean the data is missing.'
      operationId: get_optionable_tickers
      parameters:
      - description: Start of date range, inclusive (YYYY-MM-DD).
        in: query
        name: date_gte
        required: false
        schema:
          type: string
      - description: End of date range, inclusive (YYYY-MM-DD).
        in: query
        name: date_lte
        required: false
        schema:
          type: string
      - description: Start of date range, exclusive (YYYY-MM-DD).
        in: query
        name: date_gt
        required: false
        schema:
          type: string
      - description: End of date range, exclusive (YYYY-MM-DD).
        in: query
        name: date_lt
        required: false
        schema:
          type: string
      - description: 'Pagination: the ''date'' value from the previous response''s next_cursor. Must be sent together with cursor_ticker.'
        in: query
        name: cursor_date
        required: false
        schema:
          type: string
      - description: 'Pagination: the ''ticker'' value from the previous response''s next_cursor. Must be sent together with cursor_date.'
        in: query
        name: cursor_ticker
        required: false
        schema:
          type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PaginatedEnvelope'
          description: Matching rows.
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '429':
          $ref: '#/components/responses/RateLimited'
      summary: 'Historical optionable universe: point-in-time snapshots of which US equities had'
      tags:
      - Optionable Tickers
components:
  responses:
    Forbidden:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
      description: 'PRO_SUBSCRIPTION_REQUIRED: the key''s plan does not include API access; every endpoint requires an active Pro subscription. DATE_RANGE_RESTRICTED: a legacy free-tier key asked for dates outside its window. In both cases the data is not missing.'
    Unauthorized:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
      description: Missing or unrecognized API key.
    BadRequest:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
      description: Invalid or conflicting query parameters.
    RateLimited:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
      description: Rate limit exceeded (600/min); the body carries retry_after_seconds.
  schemas:
    PaginatedEnvelope:
      properties:
        count:
          type: integer
        data:
          items:
            type: object
          type: array
        has_more:
          type: boolean
        next_cursor:
          description: 'Keyset cursor: pass its fields back as the cursor_* query parameters to fetch the next page.'
          type:
          - object
          - 'null'
      required:
      - count
      - data
      - has_more
      - next_cursor
      type: object
    Error:
      additionalProperties: true
      properties:
        error: {}
      type: object
  securitySchemes:
    ApiKeyHeader:
      in: header
      name: X-API-Key
      type: apiKey
    BearerKey:
      scheme: bearer
      type: http
externalDocs:
  description: MCP server exposing these datasets as tools (OAuth or X-API-Key).
  url: https://mcp.alphanume.com/mcp