> ## Documentation Index > Fetch the complete documentation index at: https://docs.arbiterapi.com/llms.txt > Use this file to discover all available pages before exploring further. # List Markets > List prediction markets across all platforms with optional filtering by platform, status, tags, volume, and text search. Results sorted by 24h volume descending. ## OpenAPI ````yaml GET /v1/markets openapi: 3.1.0 info: title: Arbiter description: >- Unified prediction market API. Aggregates Polymarket and Kalshi into a single interface with normalized data, historical trades, OHLCV candles, orderbook snapshots, and real-time WebSocket streaming. version: 1.0.0 servers: [] security: [] tags: - name: Markets description: Browse, search, and retrieve prediction markets across all platforms. - name: Market Data description: Prices, orderbooks, trades, and OHLCV candles for individual markets. - name: Events description: Markets grouped by real-world events (elections, sports, etc.). - name: Cross-Platform description: Find the same event across Polymarket and Kalshi. - name: Sports description: Browse prediction markets by sport and date. - name: Wallets description: 'Wallet analytics: profile, trades, positions, PnL, activity (Polymarket).' - name: Polymarket Native description: Raw Polymarket data with platform-specific fields. - name: Kalshi Native description: Raw Kalshi data with platform-specific fields. - name: Whales description: Track large trades across all prediction markets. - name: Webhooks description: Subscribe to events via HTTP POST — trades, whale alerts, price changes. - name: WebSocket description: Real-time streaming of trades, prices, and orderbook updates. - name: Auth description: Developer account management and API key authentication. - name: System description: Health checks and system statistics. paths: /v1/markets: get: tags: - Markets summary: List Markets description: >- List prediction markets across all platforms with optional filtering by platform, status, tags, volume, and text search. Results sorted by 24h volume descending. operationId: list_markets_v1_markets_get parameters: - name: platform in: query required: false schema: anyOf: - $ref: '#/components/schemas/Platform' - type: 'null' title: Platform - name: status in: query required: false schema: anyOf: - $ref: '#/components/schemas/MarketStatus' - type: 'null' title: Status - name: tag in: query required: false schema: anyOf: - type: string - type: 'null' title: Tag - name: min_volume in: query required: false schema: anyOf: - type: number - type: 'null' title: Min Volume - name: search in: query required: false schema: anyOf: - type: string - type: 'null' description: Search market questions by keyword title: Search description: Search market questions by keyword - name: limit in: query required: false schema: type: integer maximum: 200 minimum: 1 default: 50 title: Limit - name: cursor in: query required: false schema: anyOf: - type: string - type: 'null' description: Pagination cursor from previous response title: Cursor description: Pagination cursor from previous response responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/MarketsResponse' '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' components: schemas: Platform: type: string enum: - polymarket - kalshi title: Platform MarketStatus: type: string enum: - open - closed - resolved title: MarketStatus MarketsResponse: properties: markets: items: $ref: '#/components/schemas/UnifiedMarket' type: array title: Markets cursor: anyOf: - type: string - type: 'null' title: Cursor has_more: type: boolean title: Has More default: false type: object required: - markets title: MarketsResponse HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError UnifiedMarket: properties: id: type: string title: Id slug: type: string title: Slug question: type: string title: Question description: anyOf: - type: string - type: 'null' title: Description status: $ref: '#/components/schemas/MarketStatus' outcomes: items: $ref: '#/components/schemas/Outcome' type: array title: Outcomes platforms: items: $ref: '#/components/schemas/PlatformListing' type: array title: Platforms volume_24h: type: number title: Volume 24H default: 0 volume_total: anyOf: - type: number - type: 'null' title: Volume Total open_interest: anyOf: - type: number - type: 'null' title: Open Interest created_at: anyOf: - type: integer - type: 'null' title: Created At close_time: anyOf: - type: integer - type: 'null' title: Close Time tags: items: type: string type: array title: Tags default: [] category: anyOf: - type: string - type: 'null' title: Category event_slug: anyOf: - type: string - type: 'null' title: Event Slug image: anyOf: - type: string - type: 'null' title: Image type: object required: - id - slug - question - status - outcomes - platforms title: UnifiedMarket ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type type: object required: - loc - msg - type title: ValidationError Outcome: properties: label: type: string title: Label price: type: number title: Price price_cents: type: integer title: Price Cents type: object required: - label - price - price_cents title: Outcome PlatformListing: properties: platform: $ref: '#/components/schemas/Platform' native_id: type: string title: Native Id url: anyOf: - type: string - type: 'null' title: Url best_bid: anyOf: - type: number - type: 'null' title: Best Bid best_ask: anyOf: - type: number - type: 'null' title: Best Ask volume_24h: anyOf: - type: number - type: 'null' title: Volume 24H type: object required: - platform - native_id title: PlatformListing ````