> ## Documentation Index > Fetch the complete documentation index at: https://docs.agg.market/llms.txt > Use this file to discover all available pages before exploring further. # Trades > Subscribe to public trade feed for outcomes. No user auth required. Uses { action: "subscribe", channel: "trades", outcomeIds } message format. Shares the 500-subscription limit with orderbook subscriptions. ## AsyncAPI ````yaml openapi/asyncapi.json trades id: trades title: Trades description: >- Subscribe to public trade feed for outcomes. No user auth required. Uses { action: "subscribe", channel: "trades", outcomeIds } message format. Shares the 500-subscription limit with orderbook subscriptions. servers: - id: production protocol: wss host: ws.agg.market bindings: [] variables: [] address: / parameters: [] bindings: [] operations: - &ref_2 id: subscribeTrades title: Subscribe trades description: Subscribe to public trade feed type: send messages: - &ref_5 id: subscribe payload: - name: Subscribe to orderbook description: Subscribe to aggregated orderbook updates for markets type: object properties: - name: action type: string description: subscribe required: true - name: channel type: string required: true - name: outcomeIds type: array description: Outcome IDs to subscribe to required: true properties: - name: item type: string required: false headers: [] jsonPayloadSchema: title: Subscribe type: object required: - action - channel - outcomeIds properties: action: const: subscribe type: string x-parser-schema-id: channel: anyOf: - const: orderbook type: string x-parser-schema-id: - const: trades type: string x-parser-schema-id: x-parser-schema-id: outcomeIds: description: Outcome IDs to subscribe to type: array items: type: string x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: title: Subscribe to orderbook description: Subscribe to aggregated orderbook updates for markets example: |- { "action": "subscribe", "channel": "orderbook", "outcomeIds": [ "clv2abc123def456", "clv2xyz789ghi012" ] } bindings: [] extensions: - id: x-parser-unique-object-id value: subscribe bindings: [] extensions: &ref_0 - id: x-parser-unique-object-id value: trades - &ref_3 id: unsubscribeTrades title: Unsubscribe trades description: Unsubscribe from trade feed type: send messages: - &ref_6 id: unsubscribe payload: - name: Unsubscribe from orderbook type: object properties: - name: action type: string description: unsubscribe required: true - name: channel type: string required: true - name: outcomeIds type: array description: Outcome IDs to unsubscribe from required: true properties: - name: item type: string required: false headers: [] jsonPayloadSchema: title: Unsubscribe type: object required: - action - channel - outcomeIds properties: action: const: unsubscribe type: string x-parser-schema-id: channel: anyOf: - const: orderbook type: string x-parser-schema-id: - const: trades type: string x-parser-schema-id: x-parser-schema-id: outcomeIds: description: Outcome IDs to unsubscribe from type: array items: type: string x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: title: Unsubscribe from orderbook example: |- { "action": "unsubscribe", "channel": "orderbook", "outcomeIds": [ "clv2abc123def456", "clv2xyz789ghi012" ] } bindings: [] extensions: - id: x-parser-unique-object-id value: unsubscribe bindings: [] extensions: *ref_0 - &ref_1 id: receiveTrade title: Receive trade description: Public trade event from a venue type: receive messages: - &ref_4 id: trade payload: - name: Trade description: Public trade event from a venue type: object properties: - name: type type: string description: trade required: true - name: outcomeId type: string required: true - name: channel type: string required: false - name: venue type: string required: true - name: side type: string required: true - name: price type: number description: Normalized 0-1 price required: true - name: size type: number description: Venue-native units required: true - name: timestamp type: number required: true headers: [] jsonPayloadSchema: title: Trade type: object required: - type - outcomeId - venue - side - price - size - timestamp properties: type: const: trade type: string x-parser-schema-id: outcomeId: type: string x-parser-schema-id: channel: anyOf: - const: orderbook type: string x-parser-schema-id: - const: trades type: string x-parser-schema-id: x-parser-schema-id: venue: type: string x-parser-schema-id: side: anyOf: - const: buy type: string x-parser-schema-id: - const: sell type: string x-parser-schema-id: x-parser-schema-id: price: description: Normalized 0-1 price type: number x-parser-schema-id: size: description: Venue-native units type: number x-parser-schema-id: timestamp: type: number x-parser-schema-id: x-parser-schema-id: title: Trade description: Public trade event from a venue example: |- { "type": "trade", "outcomeId": "clv2abc123def456", "channel": "orderbook", "venue": "polymarket", "side": "buy", "price": 0.55, "size": 100, "timestamp": 1710000000000 } bindings: [] extensions: - id: x-parser-unique-object-id value: trade bindings: [] extensions: *ref_0 sendOperations: - *ref_1 receiveOperations: - *ref_2 - *ref_3 sendMessages: - *ref_4 receiveMessages: - *ref_5 - *ref_6 extensions: - id: x-parser-unique-object-id value: trades securitySchemes: - id: appId name: appId type: userPassword description: >- App-level auth: pass appId as a query parameter on connect. Required for all connections. The appId must belong to an active app with matching allowed origins. extensions: [] - id: jwt name: jwt type: http description: >- User-level auth: pass JWT as token query param on connect, or send { action: 'authenticate', token } mid-session. Required for user-specific events (orders, balances). Same JWT as the REST API. scheme: bearer bearerFormat: JWT extensions: [] ````