> ## Documentation Index > Fetch the complete documentation index at: https://docs.solanatracker.io/llms.txt > Use this file to discover all available pages before exploring further. # Market prices > Live top-of-book mid (+ displayPrice). Market-scoped only — there is no pm:prices firehose. ## AsyncAPI ````yaml datastream/pm-prices.json marketPrices id: marketPrices title: Market prices description: >- Live top-of-book mid (+ displayPrice). Market-scoped only — there is no pm:prices firehose. servers: - id: production protocol: wss host: datastream.solanatracker.io bindings: [] variables: - id: apiKey description: Your unique API key from Data API subscription defaultValue: YOUR_DATASTREAM_KEY allowedValues: [] examples: [] address: / parameters: [] bindings: [] operations: - &ref_1 id: subscribeMarketPrices title: Subscribe market prices description: Subscribe to top-of-book mid prices type: receive messages: - &ref_4 id: joinMarketPrices payload: - name: joinMarketPrices description: Subscribe to top-of-book mid prices type: object properties: - name: type type: string description: join required: true - name: room type: string description: 'Room pattern: `pm:market:{exchange}:{marketId}:prices`' required: true headers: [] jsonPayloadSchema: type: object required: - type - room properties: type: type: string const: join default: join x-parser-schema-id: room: type: string description: 'Room pattern: `pm:market:{exchange}:{marketId}:prices`' default: pm:market:polymarket:1234567890:prices x-parser-schema-id: examples: - type: join room: pm:market:polymarket:1234567890:prices x-parser-schema-id: title: Join market prices description: Subscribe to top-of-book mid prices example: |- { "type": "join", "room": "pm:market:polymarket:1234567890:prices" } bindings: [] extensions: - id: x-parser-unique-object-id value: joinMarketPrices - id: x-parser-message-name value: joinMarketPrices bindings: [] extensions: &ref_0 - id: x-displayName value: Market Prices - id: x-parser-unique-object-id value: marketPrices - &ref_3 id: receiveMarketPricesMessage title: Receive market prices message description: Receive Market Prices updates type: send messages: - &ref_6 id: marketPricesMessage payload: - name: marketPricesMessage description: Market Prices update type: object properties: - name: type type: string description: message required: false - name: room type: string required: false - name: data type: object description: >- Flat room data. Envelope fields plus event-specific fields (trade/price/orderbook/…) at the top level. required: false properties: - name: type type: string description: >- Event kind (trade, price, orderbook_snapshot, quote, crypto_price, …) required: true - name: channel type: string enumValues: - prices - trades - orderbook - quotes - volume - market_lifecycle - resolution required: true - name: exchange type: string enumValues: - kalshi - polymarket required: true - name: marketId type: string required: true - name: eventId type: string required: false - name: seriesId type: string required: false - name: category type: string required: false - name: sport type: string required: false - name: sourceId type: string description: Exchange/source idempotency key (omit when empty) required: false - name: timestamp type: integer description: Unix epoch milliseconds required: true headers: [] jsonPayloadSchema: type: object properties: type: type: string const: message x-parser-schema-id: room: type: string x-parser-schema-id: data: type: object description: >- Flat room data. Envelope fields plus event-specific fields (trade/price/orderbook/…) at the top level. additionalProperties: true required: - type - channel - exchange - marketId - timestamp properties: type: type: string description: >- Event kind (trade, price, orderbook_snapshot, quote, crypto_price, …) x-parser-schema-id: channel: type: string enum: - prices - trades - orderbook - quotes - volume - market_lifecycle - resolution x-parser-schema-id: exchange: type: string enum: - kalshi - polymarket x-parser-schema-id: marketId: type: string x-parser-schema-id: eventId: type: string x-parser-schema-id: seriesId: type: string x-parser-schema-id: category: type: string x-parser-schema-id: sport: type: string x-parser-schema-id: sourceId: type: string description: Exchange/source idempotency key (omit when empty) x-parser-schema-id: timestamp: type: integer description: Unix epoch milliseconds x-parser-schema-id: x-parser-schema-id: RealtimeData examples: - type: message room: pm:market:polymarket:1234567890:prices data: type: trade channel: trades exchange: polymarket marketId: '1234567890' timestamp: 1785347120123 x-parser-schema-id: title: Market prices message description: Market Prices update example: |- { "type": "message", "room": "pm:market:polymarket:1234567890:prices", "data": { "type": "trade", "channel": "trades", "exchange": "polymarket", "marketId": "1234567890", "timestamp": 1785347120123 } } bindings: [] extensions: - id: x-parser-unique-object-id value: marketPricesMessage - id: x-parser-message-name value: marketPricesMessage bindings: [] extensions: *ref_0 - &ref_2 id: unsubscribeMarketPrices title: Unsubscribe market prices description: Unsubscribe from Market Prices type: receive messages: - &ref_5 id: leaveMarketPrices payload: - name: leaveMarketPrices description: Unsubscribe from Market Prices type: object properties: - name: type type: string description: leave required: true - name: room type: string required: true headers: [] jsonPayloadSchema: type: object required: - type - room properties: type: type: string const: leave default: leave x-parser-schema-id: room: type: string default: pm:market:polymarket:1234567890:prices x-parser-schema-id: examples: - type: leave room: pm:market:polymarket:1234567890:prices x-parser-schema-id: title: Leave market prices description: Unsubscribe from Market Prices example: |- { "type": "leave", "room": "pm:market:polymarket:1234567890:prices" } bindings: [] extensions: - id: x-parser-unique-object-id value: leaveMarketPrices - id: x-parser-message-name value: leaveMarketPrices bindings: [] extensions: *ref_0 sendOperations: - *ref_1 - *ref_2 receiveOperations: - *ref_3 sendMessages: - *ref_4 - *ref_5 receiveMessages: - *ref_6 extensions: - id: x-displayName value: Market Prices - id: x-parser-unique-object-id value: marketPrices securitySchemes: - id: apiKeyAuth name: apiKey type: httpApiKey description: >- API key for authentication. Include your Datastream key in the connection URL: wss://datastream.solanatracker.io/{DATASTREAM_KEY} in: header extensions: [] ````