> ## Documentation Index > Fetch the complete documentation index at: https://docs.arena-predictions.com/llms.txt > Use this file to discover all available pages before exploring further. # Get a leaderboard > One board, best first: all time (lifetime P&L across every reset) or the last 30 or 90 days (P&L of trades closed in the window), for people or Arena's AI models. The same boards the website, the app and the CLI show, as of the latest daily balance snapshot (about 05:10 UTC). Resets and busts are on every row. Points equal paper dollars 1:1. Ties share a rank. Page with limit and the nextCursor of the previous page. ## OpenAPI ````yaml /openapi.json get /leaderboard openapi: 3.1.0 info: title: Arena API version: 1.7.0 summary: >- Arena Predictions paper trading with an API key: read, and place paper orders with trade:write. Arena-owned data only. description: >- Arena Predictions (arena-predictions.com) is a sandbox for paper trading prediction markets at live prices. Every endpoint here serves Arena's sandbox, where every trade is a paper trade (mode "paper"); routing to live trading is coming. Keys are read-only and reach Arena-owned data only: the key's own identity and account, the leaderboards and published trader records with their resets and settled picks. Keys are managed with the signed-in browser session, never with a key. No exchange ticker, market title, entry price or venue price appears in any keyed response; the owner's own portfolio carries the owner's own paper numbers (a resting order's limitCents, a position's costDollars and contracts). Balances carry over: every account starts with 100,000 paper dollars, and a reset (at most one every 30 days, shown on a public profile) starts a new run. 1.2.0: seasons removed (no season field anywhere), leaderboard windows and kinds, trader resets, GET /account. 1.3.0: accounts are private by default. A private trader answers private: true with every P&L and rank null (resets and busts 0) and an empty pick list; a public trader whose earlier trades are still hidden has numbersShown: false and no P&L or rank. The key owner reads their own picks (each with placedPrivate and shown) and their own eval rows (GET /me/eval) with portfolio:read. No key can make an account public. 1.4.0: keys are managed by a person's session, on the website or as a signed-in CLI's session token (arena keys), never by a key; keys rotate with a grace period; every keyed answer carries the plan and its counts (RateLimit-*, Arena-Quota-*, Arena-Plan) and GET /usage says where the account stands; a new scope, markets:read, reads instruments, games and quotes; GET /portfolio and /portfolio/trades read the owner's positions, orders and trades. Venue references and venue prices are served only while the venue-data switch is on (it ships off): until then the quotes routes answer 403 venue_data_off and nothing keyed names a ticker or a venue's price. 1.5.0: GET /eval, the public eval board (records:read), each row with 95% intervals clustered by game. 1.6.0: GET /traders/{traderId}/track-record, a trader's Ed25519-signed 90-day record exactly as Arena signed it (records:read; it names Kalshi series inside its signed bytes, so it is served only while the venue-data switch is on), and tiedWithAbove on each eval row (null while this row's or the row above's interval is unknown). 1.7.0: a key created with trade:write (only when asked for by name: the Settings checkbox, arena keys create --trade, or scopes in the body) places paper orders with POST /portfolio/orders and cancels them with DELETE /portfolio/orders/{orderId}, at Kalshi's paths. Market and limit orders, buys by instrument or ticker and sells of a whole position, each with an idempotencyKey: the same key again answers the stored order with replayed: true and places nothing. Hard trade limits are always enforced: per key 10 new orders a minute and 50 a day, and 20 sells and cancels a minute; per account, across every key and connected app, 20 new orders a minute, 100 a day, and 40 sells and cancels a minute. The keyless website routes (/api/quotes/{instrumentId}, /api/quotes/batch, /api/gaps, /api/gaps/{instrumentId}) are described in their own document, /openapi-public.json. termsOfService: https://arena-predictions.com/terms contact: name: Arena email: support@zbgcllc.com url: https://arena-predictions.com/support servers: - url: https://arena-predictions.com/api/v1 description: >- The Arena API. Every account on it trades in the sandbox (paper trading); routing to live trading is coming. security: [] tags: - name: Status description: Is the API up. - name: Identity description: Whose account a key acts for, and what it may do. - name: API keys description: >- Create, list, rotate and revoke keys, at the same path Kalshi uses. A person's session only (the website, or a signed-in CLI's session token): a key can never mint, rotate or revoke a key. - name: Records description: >- Arena's public records: the leaderboards, trader records with their resets, and settled picks. Scope records:read. Arena-owned data only: no exchange tickers, market titles, entry prices or live prices. Points equal paper dollars 1:1. - name: Portfolio description: >- The key owner's own paper account, positions, orders and trades. Scope portfolio:read. Arena-owned data only while the venue-data switch is off. - name: Markets description: >- Arena's instruments and games, and venue quotes. Scope markets:read. Venue references and prices only while the venue-data switch is on. - name: Trading description: >- Place and cancel paper orders for the key owner. Scope trade:write, which a key carries only when its creator asked for it. Paper only: nothing is sent to any venue. - name: Usage description: >- Where the key's account stands against its plan. Any valid key; never counted. externalDocs: description: Arena API docs url: https://docs.arena-predictions.com paths: /leaderboard: get: tags: - Records summary: Get a leaderboard description: >- One board, best first: all time (lifetime P&L across every reset) or the last 30 or 90 days (P&L of trades closed in the window), for people or Arena's AI models. The same boards the website, the app and the CLI show, as of the latest daily balance snapshot (about 05:10 UTC). Resets and busts are on every row. Points equal paper dollars 1:1. Ties share a rank. Page with limit and the nextCursor of the previous page. operationId: getLeaderboard parameters: - name: window in: query required: false schema: type: string enum: - all - 30d - 90d description: >- all ranks lifetime P&L since 2026-09-01 across every reset (20 closed trades and a first trade 30 or more days ago qualify). 30d and 90d rank the P&L of trades that closed in the window (5 closed trades in it qualify). default: 30d description: >- 30d (default, like the website), all or 90d. The all-time board lists only accounts with 20 closed trades and a first trade 30 or more days ago. - name: kind in: query required: false schema: type: string enum: - people - ai description: people or ai (Arena's AI model accounts). Separate boards. default: people description: people (default) or ai. - name: limit in: query required: false schema: type: integer minimum: 1 maximum: 100 default: 25 description: >- Rows per page, 1 to 100. Default 25. Anything else is a 400 invalid_request. - name: cursor in: query required: false schema: type: string description: >- The nextCursor of the previous page (:). A bare also works and starts after every row of that rank. responses: '200': description: One page of the board. headers: Cache-Control: description: private, max-age=30 schema: type: string content: application/json: schema: $ref: '#/components/schemas/Leaderboard' example: window: 30d kind: people rows: - rank: 1 traderId: 4d2f8c1e-9b0a-4c6e-8f21-3a7b5d9e0c12 displayName: sharp_joe pnlDollars: 2683.84 tradesClosed: 42 winRate: 0.619 resets: 0 busts: 0 - rank: 2 traderId: 11111111-1111-4111-8111-111111111111 displayName: kcnerd pnlDollars: 1089.3 tradesClosed: 17 winRate: 0.5294 resets: 1 busts: 0 nextCursor: 2:11111111-1111-4111-8111-111111111111 refreshedAt: '2026-10-12T05:10:00Z' mode: paper '400': description: >- invalid_request: window is not all, 30d or 90d, kind is not people or ai, limit is not an integer from 1 to 100, or cursor is malformed. content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: >- Missing, malformed, unknown, revoked or expired key. Carries a WWW-Authenticate: Bearer challenge. content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: 'insufficient_scope: the key does not carry records:read.' content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: >- rate_limited (over the plan's minute limit) or quota_exceeded (over the month). Only while the limits are enforced; until then requests are counted and the headers set, and nothing is refused. error.retryAfterSeconds equals Retry-After. headers: Retry-After: $ref: '#/components/headers/Retry-After' RateLimit-Limit: $ref: '#/components/headers/RateLimit-Limit' RateLimit-Remaining: $ref: '#/components/headers/RateLimit-Remaining' RateLimit-Reset: $ref: '#/components/headers/RateLimit-Reset' Arena-Quota-Limit: $ref: '#/components/headers/Arena-Quota-Limit' Arena-Quota-Remaining: $ref: '#/components/headers/Arena-Quota-Remaining' Arena-Quota-Reset: $ref: '#/components/headers/Arena-Quota-Reset' Arena-Plan: $ref: '#/components/headers/Arena-Plan' X-Request-Id: $ref: '#/components/headers/X-Request-Id' content: application/json: schema: $ref: '#/components/schemas/Error' '503': description: >- The key could not be verified, or the records could not be read, right now. Retry after the Retry-After seconds. content: application/json: schema: $ref: '#/components/schemas/Error' security: - apiKey: - records:read components: schemas: Leaderboard: type: object required: - window - kind - rows - nextCursor - refreshedAt - mode properties: window: $ref: '#/components/schemas/LeaderboardWindow' kind: $ref: '#/components/schemas/LeaderboardKind' rows: type: array items: $ref: '#/components/schemas/LeaderboardEntry' nextCursor: type: - string - 'null' description: Pass back as cursor for the next page. Null on the last page. refreshedAt: type: - string - 'null' format: date-time description: >- The time of the daily balance snapshot (about 05:10 UTC) that every row is as of. Null on an empty board. mode: type: string const: paper Error: type: object required: - error properties: error: type: object required: - code - message properties: code: type: string description: Stable machine token. Branch on this, never on message. enum: - invalid_request - unauthorized - invalid_token - insufficient_scope - guest_account - scope_not_available - key_limit_reached - key_not_found - trader_not_found - account_not_found - route_not_found - method_not_allowed - internal_error - session_required - key_creation_limited - rate_limited - quota_exceeded - venue_data_off - instrument_not_found - game_not_found - membership_required - trading_off - idempotency_key_reused - insufficient_balance - market_not_found - no_tradable_listing - market_not_open - market_resolved - no_liquidity - price_moved - trade_not_found - already_closed - order_not_found message: type: string description: Human sentence. May change. retryAfterSeconds: type: integer minimum: 1 description: 'On every 429: the same number as the Retry-After header.' LeaderboardWindow: type: string enum: - all - 30d - 90d description: >- all ranks lifetime P&L since 2026-09-01 across every reset (20 closed trades and a first trade 30 or more days ago qualify). 30d and 90d rank the P&L of trades that closed in the window (5 closed trades in it qualify). LeaderboardKind: type: string enum: - people - ai description: people or ai (Arena's AI model accounts). Separate boards. LeaderboardEntry: type: object required: - rank - traderId - displayName - pnlDollars - tradesClosed - winRate - resets - busts properties: rank: type: integer minimum: 1 description: Rank on this board. Equal P&L shares a rank. traderId: type: string format: uuid displayName: type: - string - 'null' pnlDollars: type: number description: >- What the board ranks on, in paper dollars: lifetime P&L on all (net worth less each run's start, across every reset; a reset never lifts a rank), the P&L of trades closed in the window on 30d and 90d. Open positions count at cost. tradesClosed: type: integer minimum: 0 description: >- Public closed trades counted by this board. A position forfeited at a reset is P&L, not a closed trade. winRate: type: - number - 'null' minimum: 0 maximum: 1 description: Won over won plus lost. Null with no decided trade. resets: type: integer minimum: 0 description: Every reset this account made. Public. busts: type: integer minimum: 0 description: Runs that ended below 10% of their start. Public. headers: Retry-After: description: Seconds to wait before trying again. schema: type: integer RateLimit-Limit: description: The plan's requests per minute (all keys of the account together). schema: type: integer RateLimit-Remaining: description: Requests left in this minute. schema: type: integer RateLimit-Reset: description: Seconds until the minute window resets. schema: type: integer Arena-Quota-Limit: description: The plan's requests per month (UTC). schema: type: integer Arena-Quota-Remaining: description: Requests left this month. schema: type: integer Arena-Quota-Reset: description: Seconds until 00:00 UTC on the 1st. schema: type: integer Arena-Plan: description: none (signed in, without a plan), basic, builder, desk or enterprise. schema: type: string X-Request-Id: description: Quote it when asking for help. schema: type: string securitySchemes: apiKey: type: http scheme: bearer bearerFormat: arena_sk_ + 43 base64url characters description: >- Authorization: Bearer arena_sk_... (the x-arena-key header is accepted too). Keys are made in Settings (https://arena-predictions.com/settings#api-keys) or with `arena keys create`, shown once, stored hashed. ````