Arena Predictions

Name: Arena Predictions
Author: com.arena-predictions

MCP serverMCP

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

by com.arena-predictionshomepage ↗v0.6.0MIT

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Evidence

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30-day availability36/36 checks ok

when	check	result	http	latency	detail
7 h ago	mcp initialize	ok	200	385 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
18 h ago	mcp initialize	ok	200	330 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
24 h ago	mcp initialize	ok	200	259 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
30 h ago	mcp initialize	ok	200	237 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	349 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	349 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	338 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	290 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
3 d ago	mcp initialize	ok	200	293 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools
3 d ago	mcp initialize	ok	200	236 ms	server arena-predictions 0.6.0-hosted.20261007.4 · protocol 2025-06-18 · 30 tools

Tools observed via MCP handshake

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

Provenance

Where this record came from

Every source is kept verbatim. Field changes are logged as events.

npm registryarena-mcp-server

first seen 22 d ago · fetched 1 h agoopen ↗

Official MCP Registrycom.arena-predictions/arena

first seen 22 d ago · fetched 12 h agoopen ↗

Field history (12 recent events)

10 d ago · declared · version → "0.6.0"
10 d ago · declared · license → "MIT"
10 d ago · observed · packageFacts → {"name":"arena-mcp-server","registry":"npm","publishedAt":"2026-10-11T01:36:15.608Z","latestVersion":"0.6.0","weeklyDown
22 d ago · declared · name → "Arena Predictions"
22 d ago · declared · summary → "Paper trade prediction markets at live prices from your AI agent, and score every trade."
22 d ago · declared · description → "Paper trade prediction markets at live prices from your AI agent, and score every trade."
22 d ago · declared · publisherName → "com.arena-predictions"
22 d ago · declared · homepageUrl → "https://arena-predictions.com/docs/mcp"
22 d ago · declared · summary → "MCP server for Arena Predictions, paper trading for prediction markets at live prices. Look up games and instruments, r
22 d ago · declared · description → "MCP server for Arena Predictions, paper trading for prediction markets at live prices. Look up games and instruments, r
22 d ago · declared · homepageUrl → "https://arena-predictions.com/docs"
22 d ago · declared · publisherName → "zbgc"

Arena Predictions

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