Chalkboard esports props API: the pick'em board, normalized

What Chalkboard actually posts

Chalkboard is a DFS pick'em app. The board lives inside the app, there is no public web board and no official API for it. What it posts for esports is player lines: CS2 kills and headshots, and LoL kills, assists and deaths, each offered as an over or under pick on a set line.

The scope is the part worth noting. Lines come per map (map 1, map 2, map 3) and across guaranteed maps, the spans that are played no matter how the series ends. A CS2_HEADSHOTS_MAPS_1_2 prop grades on maps one and two only, so a 2-0 still settles. On the pull behind this post the Chalkboard board carried 800 CS2 rows; the LoL board ran about 136-145 rows the same day.

One endpoint, one row shape

Every Chalkboard line lands on GET /v7/{sport}/props as a normal prop row. Filter book=chalkboard to read just its board, or read the whole DFS board and see its rows next to PrizePicks, Underdog and the rest on the same market.

curl -s -H "X-API-Key: $KASHROCK_API_KEY" \
  "https://kashrock.up.railway.app/v7/cs2/props?book=chalkboard"

{
  "source": "kashrock",
  "sport": "cs2",
  "board": "dfs",
  "props": [
    {
      "book_name": "Chalkboard",
      "propId": "kr_prop_a266cd6d3945",
      "player_name": "JamYoung",
      "stat_type": "CS2_HEADSHOTS_MAP_2",
      "line": 8.5,
      "direction": "over",
      "decimal_odds": 1.8868,
      "team": "TyLoo",
      "opponent": "Team Liquid",
      "canonical_event_id": "kr_ev_494d81146736",
      "kr_match_id": "kr_cs2_team-liquid-vs-tyloo-04-11-2026",
      "offerId": "kr_prop_a266cd6d3945_5_over",
      "event_time": "2026-11-04T02:00:00.000Z"
    }
  ]
}

That is a real row off the board on 3 November 2026: JamYoung, 8.5 headshots on map 2, over at 1.887 decimal, TyLoo vs Team Liquid. The propId is the offer id for that book's line, and the canonical_* fields are the join: same player, same stat type, same event id as every other book posting the market.

Why these rows matter next to the other DFS books

A pick'em line is only as good as the price around it. Chalkboard rows carry the same canonical player, stat type and event ids as the other eight DFS books, so the comparison is a filter, not a join: when Chalkboard hangs 8.5 where the rest of the board posts a different number, the gap is in the response, not in your spreadsheet.

Chalkboard also goes deeper on per-map markets than the other books. On the board checked 3 November 2026 it was the only DFS book posting map-3 headshot lines, with 100 rows on each of maps 1, 2 and 3. The CS2 headshot props post breaks that market down, and the DFS books post maps all nine pick'em books on one board.

Read the registry, then the tape

GET /v7/meta reports the book the way the API sees it:

{
  "book_id": 5,
  "key": "chalkboard",
  "display_name": "Chalkboard",
  "aliases": [
    "chalkboard dfs",
    "chalkboardhq"
  ],
  "kind": "dfs_teams",
  "supports": [
    "props",
    "lines",
    "parlays"
  ]
}

Key chalkboard, book id 5, kind dfs_teams, supporting props, lines and parlays. When a Chalkboard line moves first, GET /v7/{sport}/flow flags the steam or shift play with the book that led, the same way it does for every other book on the board.

Grab a free Sandbox key on the signup page: it reads the CS2 board with 1,500 credits a day, no card. Hobby ($29.99/mo) opens every title. The Chalkboard API page is the market reference and the docs cover the schema end to end.