> ## 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 game > One game by id or slug, with its public instruments. ## OpenAPI ````yaml /openapi.json get /games/{ref} 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: /games/{ref}: get: tags: - Markets summary: Get a game description: One game by id or slug, with its public instruments. operationId: getGame parameters: - name: ref in: path required: true schema: type: string maxLength: 160 description: An id (ins_ and 12 characters, or game_ and 10) or a slug. responses: '200': description: The game. headers: 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/GameResponse' '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 markets:read.' content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: game_not_found. 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 data could not be read, right now. Retry after the Retry-After seconds. content: application/json: schema: $ref: '#/components/schemas/Error' security: - apiKey: - markets:read components: headers: 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 Retry-After: description: Seconds to wait before trying again. schema: type: integer schemas: GameResponse: type: object required: - game - instruments - count - venueData properties: game: $ref: '#/components/schemas/Game' instruments: type: array items: $ref: '#/components/schemas/Instrument' count: type: integer venueData: type: boolean asOf: type: - string - 'null' format: date-time Error: type: object required: - error properties: error: type: object required: - code - message properties: code: type: string description: Stable machine token. Branch on this, never on message. enum: - invalid_request - unauthorized - invalid_token - insufficient_scope - guest_account - scope_not_available - key_limit_reached - key_not_found - trader_not_found - account_not_found - route_not_found - method_not_allowed - internal_error - session_required - key_creation_limited - rate_limited - quota_exceeded - venue_data_off - instrument_not_found - game_not_found - membership_required - trading_off - idempotency_key_reused - insufficient_balance - market_not_found - no_tradable_listing - market_not_open - market_resolved - no_liquidity - price_moved - trade_not_found - already_closed - order_not_found message: type: string description: Human sentence. May change. retryAfterSeconds: type: integer minimum: 1 description: 'On every 429: the same number as the Retry-After header.' Game: type: object required: - id - slug - league - startsAt - status - home - away - instrumentCount properties: id: type: string pattern: ^game_[0-9A-HJKMNP-TV-Z]{10}$ slug: type: - string - 'null' league: type: - string - 'null' startsAt: type: - string - 'null' format: date-time status: type: - string - 'null' enum: - scheduled - inprogress - final - postponed - cancelled - null season: type: - integer - 'null' seasonType: type: - string - 'null' week: type: - integer - 'null' home: type: object required: - code - name properties: code: type: - string - 'null' name: type: - string - 'null' away: type: object required: - code - name properties: code: type: - string - 'null' name: type: - string - 'null' instrumentCount: type: integer description: Public instruments on the game. Instrument: type: object required: - id - slug - gameId - league - marketType - period - line - subject - label - oppositeLabel - yesMeans - startsAt - gameStatus - home - away - pushPossible - venues properties: id: type: string pattern: ^ins_[0-9A-HJKMNP-TV-Z]{12}$ description: Arena's permanent id. Opaque. slug: type: - string - 'null' description: Readable alias. May change. gameId: type: - string - 'null' gameSlug: type: - string - 'null' league: type: - string - 'null' marketType: type: - string - 'null' enum: - moneyline - spread - total - null period: type: - string - 'null' description: FG is the full game. stat: type: - string - 'null' line: type: - number - 'null' subject: oneOf: - type: object required: - code - name properties: code: type: - string - 'null' name: type: - string - 'null' - type: 'null' label: type: - string - 'null' description: 'The YES side in words: KC ML, KC -3.5, Over 44.5.' oppositeLabel: type: - string - 'null' description: The NO side in words. yesMeans: type: - string - 'null' description: What YES pays on, in a sentence. startsAt: type: - string - 'null' format: date-time description: Scheduled start. Postponements move it; the id never moves. gameStatus: type: - string - 'null' home: type: object required: - code - name properties: code: type: - string - 'null' name: type: - string - 'null' away: type: object required: - code - name properties: code: type: - string - 'null' name: type: - string - 'null' pushPossible: type: boolean tieRule: type: - string - 'null' settlesOn: type: - string - 'null' postponementWindowHours: type: - number - 'null' rulesVersion: type: - integer - 'null' venues: type: array items: type: string enum: - kalshi - novig - polymarket description: Venues with a listing Arena shows. listings: type: array items: $ref: '#/components/schemas/VenueListing' description: Only on GET /instruments/{ref}. VenueListing: type: object required: - venue - polarity - sideLabel - fungibility - reviewed - note - buyForYes - buyForNo properties: venue: type: string enum: - kalshi - novig - polymarket polarity: type: integer enum: - 1 - -1 description: >- 1: holding the listed side pays when the instrument is YES. -1: when it is NO. sideLabel: type: - string - 'null' description: The listed side in Arena's words. fungibility: type: string enum: - exact - condition_scope reviewed: type: boolean description: >- True when a person approved the match; false when it was matched by rule. note: type: - string - 'null' description: How the venue's contract differs, in plain words. buyForYes: type: - string - 'null' description: >- Kalshi: yes or no, the side of the listed market to buy to hold the instrument's YES. Other venues: only while the venue-data switch is on. buyForNo: type: - string - 'null' venueMarketId: type: - string - 'null' description: Only while the venue-data switch is on. venueSideRef: type: - string - 'null' description: Only while the venue-data switch is on. venueEvent: type: - string - 'null' description: Only while the venue-data switch is on. 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. ````