The Rundown V2 WebSocket API

openapi: 3.0.3
info:
  title: TheRundown Sports V1 Delta V2 WebSocket API
  version: 2.0.0
  description: 'Real-time and historical sports betting data, odds, lines, and statistics across major North American and international sports leagues.


    ## Authentication

    All endpoints (except `/sports` and `/affiliates`) require authentication. Pass your API key using one of:

    - **Query parameter**: `?key=YOUR_API_KEY`

    - **Header**: `X-Therundown-Key: YOUR_API_KEY`

    ## Off-the-Board Sentinel Value

    The value **0.0001** indicates a line is "off the board" — the sportsbook has temporarily removed pricing (e.g., pending injury news). This is NOT an error. Display as "Off Board" or "N/A" in your UI.


    ## Rate Limiting

    Requests are rate-limited per API key tier. Check response headers for current limits.


    ## Data Updates

    - Live odds update in real-time during games

    - Use delta endpoints for efficient polling of changes

    - WebSocket connections available for streaming updates


    ## V1 vs V2

    V2 endpoints use market-based data structures (market_id, participants, line prices). V1 endpoints use legacy line-based structures (moneyline, spread, total objects). V2 is recommended for new integrations.

    '
  contact:
    name: TheRundown API Support
    url: https://therundown.io
    email: support@therundown.io
  termsOfService: https://therundown.io/terms
servers:
- url: https://therundown.io
  description: Production
security:
- ApiKeyQuery: []
- ApiKeyHeader: []
tags:
- name: V2 WebSocket
  description: Real-time streaming via WebSocket (V2)
paths:
  /api/v2/ws/markets:
    get:
      operationId: v2WebSocketMarkets
      tags:
      - V2 WebSocket
      summary: Markets WebSocket — stream real-time market price updates
      description: "Establishes a WebSocket connection for streaming V2 market price changes in real-time.\n\n**Connection**: `wss://therundown.io/api/v2/ws/markets?key=YOUR_API_KEY`\n\n**Filter parameters** (query string):\n- `affiliate_ids` — comma-separated affiliate IDs\n- `sport_ids` — comma-separated sport IDs\n- `event_ids` — comma-separated event IDs\n- `market_ids` — comma-separated market IDs\n\nAll filters are optional. If none are specified, all messages are received.\n\n**Heartbeat**: Server sends `{\"meta\":{\"type\":\"heartbeat\"},\"data\":{\"now\":\"<RFC3339>\"}}` every 15 seconds.\n\n**Message format**:\n```json\n{\n  \"meta\": {...},\n  \"data\": {\n    \"affiliate_id\": 19,\n    \"sport_id\": 4,\n    \"event_id\": \"abc123\",\n    \"market_id\": 1,\n    ...\n  }\n}\n```\n\n**Queue**: 256-message buffer per client. If the client falls behind, messages are dropped.\n"
      parameters:
      - $ref: '#/components/parameters/AffiliateIDsQuery'
      - name: sport_ids
        in: query
        schema:
          type: string
        description: Comma-separated sport IDs to filter
      - name: event_ids
        in: query
        schema:
          type: string
        description: Comma-separated event IDs to filter
      - name: market_ids
        in: query
        schema:
          type: string
        description: Comma-separated market IDs to filter
      responses:
        '101':
          description: WebSocket upgrade successful
components:
  parameters:
    AffiliateIDsQuery:
      name: affiliate_ids
      in: query
      schema:
        type: string
      description: Comma-separated sportsbook/affiliate IDs to filter. Common values include DraftKings (19), FanDuel (23), BetMGM (22), Bovada (2), Pinnacle (3).
  securitySchemes:
    ApiKeyQuery:
      type: apiKey
      in: query
      name: key
      description: API key as query parameter
    ApiKeyHeader:
      type: apiKey
      in: header
      name: X-Therundown-Key
      description: API key as request header