com.arena-predictions/arena

up checked 2026-11-11T10:39:15.718Z

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Publisher-provided title

Arena Predictions

Publisher-provided description

Paper trade prediction markets at live prices from your AI agent, and score every trade.

Summary by lookupd

Lets an agent paper trade prediction market contracts, view live quotes, and review positions and performance stats.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http arena https://arena-predictions.com/mcp

Claude Code, npm package (stdio)

claude mcp add arena -- npx -y arena-mcp-server

Codex, remote (streamable-http)

codex mcp add arena --url https://arena-predictions.com/mcp

Codex, npm package (stdio)

codex mcp add arena -- npx -y arena-mcp-server

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "arena": {
      "url": "https://arena-predictions.com/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (30 tools)

Publisher-provided text

• get_leaderboard Public leaderboards in paper dollars: window 30d (default) or 90d ranks profit on trades closed in it (5 or more); all ranks profit since Sep 1, 2026 (20 or mor
• get_trader One trader's public record by user id or name. Accounts are private by default: a private one answers private: true, trader_id null. A public one: standing, lif
• get_eval_board The public eval board: people and AI models scored on settled public picks, ranked inside rank_basis, never by profit, with the market's own scores and 95% inte
• get_privacy Whether the account is private (the default) or public, how many trades are hidden, and whether others see its balance and rank. Only the person makes it public
• set_privacy Make the account private: others stop seeing its trades and record. Only call this when the person asked for it in this conversation. It cannot make an account
• get_positions Open positions with stake, instrument_id, bet, payout_if_win_dollars, loss_if_lose_dollars and web_url, plus balance and net worth; start here. live=true (defau
• get_balance The account in paper dollars, carried over; balance_dollars is what is spendable. season_start_dollars is DEPRECATED (start_balance_dollars). web_url is the per
• get_history Settled and sold trades, newest first, with realized P&L, instrument_id and a win/loss/void tally; scope with window, since, until or run. A reset write-off is
• get_my_stats Grades your closed trades: win rate against prices paid, calibration by price band, closing-line value, return on stake, max drawdown and your stated probabilit
• list_markets Browse open markets by league, sport or event: compact quote rows with a spread. They go stale: get_market before trading.
• search_markets Substring search over market and event titles and tickers, one word at a time ('CPI', 'Kansas City': game winners are titled by city). list_markets with event_t
• resolve_market A bet in words to Arena instrument ids and the Kalshi ticker and side to buy: 'chiefs ml', 'mia +3.5', 'kc mia under 44.5 sunday'. Full-game lines on half point
• get_instrument One instrument by id (ins_...) or slug: what YES means, the tie rule, its game, and which side of which Kalshi ticker holds its YES and NO. No sign-in.
• get_game One game (game_ id, slug or words) with every instrument, moneylines first: instrument_id, ticker, yes_pct (Kalshi's chance; signed out, the moneylines only) an
• list_games A day's games in every league, grouped by league, with each moneyline's chance (Kalshi, percent): today (New York) or the date given; an empty day names next_da
• get_market Live quote for one market (ticker, ins_ id, slug or a bet in words): each side's bid and ask in cents ($1 contracts), yes_pct, no_pct, spread, status, close, ga
• get_orderbook Depth as [price_cents, quantity] bid pairs per side plus best bid and ask; contracts adds walk, that size's cost through the book. Paper fills take the whole si
• get_price_history One market's recent path in cents (the YES chance in percent): current_cents, open_cents, high_cents, low_cents, change_cents, rv_cents, volume and a sparkline.
• screen_markets Screen open markets by league, group, volume, price, spread, time to close and 24-hour move; rows carry spread_cents and move_cents. get_market before trading.
• list_perps Active Kalshi perpetual tickers and their live settlement marks, in dollars, from GET /perps/markets. status is active (default), inactive, closed or all.
• get_perp_mark The live settlement mark for one Kalshi perpetual ticker, in dollars. Tickers come from list_perps.
• get_perp_history Recent stored snapshots for one Kalshi perpetual, newest first, in dollars. limit defaults to 20, max 50. since and until bound the window. source is all, live
• get_cross_venue_quotes One instrument's YES price on each venue Arena shows, always as Kalshi, Novig, Polymarket, ProphetX, not ranked by price: 0-1 chances (yes_pct in percent) with
• find_price_gaps Price gaps across Kalshi, Novig, Polymarket and ProphetX after taker fees: the list without ref (arbitrage first), all pairs with ref. A pair buys YES on one ve
• get_orders Your limit orders with instrument_id; default status=resting (live, holding money, able to fill): check it before placing on the same market. cancel_reason says
• get_track_record A trader's Ed25519-signed record over the last 90 days (arena.track_record), by user id or name. verify=true checks it against the key Arena publishes on its we
• place_trade Buy YES or NO contracts. Required: contracts or stake_dollars; exactly one pair, ticker + side or instrument_id + instrument_side; and, to place (not with dry_r
• sell_trade Exit an open position at the bid (current_bid_cents), or rest a limit exit that holds no money. No bid: a market sell cannot. A closed trade answers its termina
• cancel_order Withdraw a resting limit. A buy returns its hold; a sell leaves the position. Already filled or closed answers reduced_by=0. confirm=true. live cancels Kalshi;
• settle_open Settle your positions whose markets have resolved and report what changed; a backstop to the 5-minute settlement cron, safe at session start. Idempotent. Requir

Details

• Version: 0.6.0
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 619 ms
• First indexed: 2026-11-01T08:52:56.461Z
• Last seen in registry: 2026-11-01T08:52:56.471Z
• Website: https://arena-predictions.com/docs/mcp

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• Last crawl: 2026-11-11T18:17:25.333Z
• API base: https://api.lookupd.com
• MCP URL: https://api.lookupd.com/mcp