Boom API.
Fantasy multiline props, one endpoint.

No. Boom has no official public props API — KashRock ingests the board and serves it normalized. Query GET /v6/esports/{sport}/props?book=boom with a free Sandbox key.

• —Player, stat type, line, direction, team, and canonical propId per prop.
• —Same schema as PrizePicks, Underdog, Betr, Sleeper, and Pick6.
• —Live multiline boards refreshed from the Boom app feed.

One key covers Boom and the other 24 books — every row comes back on the same schema, so nothing about the read is Boom-specific.

A real Boom row from production — the same shape every other book returns, with the canonical propId that lets you line-shop across venues.

{
  "source": "kashrock",
  "sport": "cs2",
  "props": [
    {
      "propId": "8c9d0e9e-c56a-493e-8911-107bca7fb696",
      "player_name": "doc",
      "stat_type": "CS2_KILLS_MAPS_1_2",
      "line": 32.5,
      "odds": 1.76,
      "direction": "over",
      "team": "DENDELE CS",
      "book_name": "Boom",
      "event_time": "2026-09-11T20:00:00+00:00"
    }
  ]
}

• —The app's internal endpoints change without notice — the normalized schema does not
• —Player, stat, line, direction, and team arrive already mapped to canonical KashRock ids
• —The same propId lines Boom up next to every other book for comparison
• —One API key and one auth header replace per-source session handling

• —Create a free Sandbox key on Pricing — $0, no card, 500 requests every UTC day
• —Call GET /v6/esports/cs2/props?book=boom with the key in the X-API-Key header
• —Filter by stat_type, player, or match — the response is the board as KashRock serves it