PropLine

npm version License: MIT

Listed in the official MCP Registry as io.github.proplineapi/propline-mcp — discoverable from Claude Code, Claude Desktop, and any MCP-aware client.

Model Context Protocol server for the PropLine player props betting odds API. Plug it into Claude Desktop, Claude Code, or any MCP-compatible client and ask natural-language questions about live odds, prop resolution, cross-book +EV, scores, and box-score stats — the model picks the right tool, calls the API, and answers from real data.

No more "I'd need an API for that" deflections from your AI assistant. PropLine MCP turns sports-betting research into a chat.

What you can ask

Once installed, you can prompt the model with things like:

• "What's the +EV on Yankees vs Red Sox tonight across all books?"
• "Pull Aaron Judge's last 20 prop-bet history with hit/miss outcomes."
• "List today's MLB pitcher strikeout props from DraftKings and Pinnacle side by side."
• "Did Nikola Jokic's points prop hit last night? What was the line?"
• "Compare PrizePicks DFS projections to Bovada lines for tonight's NBA slate."

The model uses these tools transparently:

Tool	What it does
propline_list_sports	Discover what sports PropLine polls (24 today)
propline_list_events	Upcoming events for a sport, with ids
propline_list_event_markets	Available market types for an event
propline_get_odds	Live odds — bulk by sport or full props per event
propline_get_odds_history	Hobby+: snapshot history per outcome; supports period filters (from/to, relative_from/relative_to, interval, changes_only)
propline_get_odds_closing	Hobby+: closing line per (book, market, outcome) — CLV helper
propline_get_scores	Game scores + status (free)
propline_get_resolution_summary	Graded-prop volume + per-sport/market breakdown (free)
propline_get_event_stats	Raw box-score stats (free, book-agnostic)
propline_get_event_results	Pro: graded won/lost/push per prop
propline_get_player_history	Player prop history with resolution
propline_get_event_ev	Pro: cross-book +EV with no-vig fair lines

Install

1. Get a PropLine API key

prop-line.com — free tier is 1,000 requests/day, no credit card. Pro at $19/mo unlocks resolution, history, and +EV.

2. Add to your MCP client

Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "propline": {
      "command": "npx",
      "args": ["-y", "propline-mcp"],
      "env": {
        "PROPLINE_API_KEY": "YOUR_KEY_HERE"
      }
    }
  }
}

Restart Claude Desktop. The hammer icon should show 10 PropLine tools.

Claude Code

claude mcp add propline \
  --env PROPLINE_API_KEY=YOUR_KEY \
  -- npx -y propline-mcp

Any other MCP client

Run propline-mcp as a stdio server. Most clients accept a command + env. See the MCP spec for client-specific config.

Configuration

Env var	Required	Default	Notes
PROPLINE_API_KEY	yes	—	Get a free key at prop-line.com
PROPLINE_BASE_URL	no	https://api.prop-line.com	Override for self-hosted setups

Comparison with the-odds-api

PropLine is API-compatible at the response level (same bookmakers[].markets[].outcomes[] shape) and adds three things the-odds-api doesn't offer at any tier:

1. Prop resolution — every Over/Under graded against the actual box-score stat after the game
2. Cross-book +EV — Pinnacle-anchored no-vig fair lines per book, sorted with +EV plays at the top
3. Webhooks — push delivery on Streaming tier, not pull-only

Pricing: free at 1,000 req/day (vs their 500/month), Pro at $19/mo for 25,000 req/day, Streaming at $79/mo for 1,000,000 req/day. No credit math.

License

MIT