> ## 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. # Crypto underlying > Live Chainlink underlying USD ticks for crypto up/down charts (btc, eth, …). Isolated from probability price rooms. ## AsyncAPI ````yaml datastream/pm-crypto.json cryptoUnderlying id: cryptoUnderlying title: Crypto underlying description: >- Live Chainlink underlying USD ticks for crypto up/down charts (btc, eth, …). Isolated from probability price rooms. 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: subscribeCryptoUnderlying title: Subscribe crypto underlying description: Subscribe to Chainlink underlying price ticks type: receive messages: - &ref_4 id: joinCryptoUnderlying payload: - name: joinCryptoUnderlying description: Subscribe to Chainlink underlying price ticks type: object properties: - name: type type: string description: join required: true - name: room type: string description: 'Room pattern: `pm:crypto:{asset}`' 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:crypto:{asset}`' default: pm:crypto:btc x-parser-schema-id: examples: - type: join room: pm:crypto:btc x-parser-schema-id: title: Join crypto underlying description: Subscribe to Chainlink underlying price ticks example: |- { "type": "join", "room": "pm:crypto:btc" } bindings: [] extensions: - id: x-parser-unique-object-id value: joinCryptoUnderlying - id: x-parser-message-name value: joinCryptoUnderlying bindings: [] extensions: &ref_0 - id: x-displayName value: Crypto Underlying - id: x-parser-unique-object-id value: cryptoUnderlying - &ref_3 id: receiveCryptoUnderlyingMessage title: Receive crypto underlying message description: Receive Crypto Underlying updates type: send messages: - &ref_6 id: cryptoUnderlyingMessage payload: - name: cryptoUnderlyingMessage description: Crypto Underlying 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:crypto:btc data: type: crypto_price channel: prices exchange: polymarket marketId: btc/usd category: crypto sourceId: chainlink:btc/usd:1782753357213 timestamp: 1782753357213 symbol: BTC pair: btc/usd asset: btc value: 64822.23 source: chainlink x-parser-schema-id: title: Crypto underlying message description: Crypto Underlying update example: |- { "type": "message", "room": "pm:crypto:btc", "data": { "type": "crypto_price", "channel": "prices", "exchange": "polymarket", "marketId": "btc/usd", "category": "crypto", "sourceId": "chainlink:btc/usd:1782753357213", "timestamp": 1782753357213, "symbol": "BTC", "pair": "btc/usd", "asset": "btc", "value": 64822.23, "source": "chainlink" } } bindings: [] extensions: - id: x-parser-unique-object-id value: cryptoUnderlyingMessage - id: x-parser-message-name value: cryptoUnderlyingMessage bindings: [] extensions: *ref_0 - &ref_2 id: unsubscribeCryptoUnderlying title: Unsubscribe crypto underlying description: Unsubscribe from Crypto Underlying type: receive messages: - &ref_5 id: leaveCryptoUnderlying payload: - name: leaveCryptoUnderlying description: Unsubscribe from Crypto Underlying 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:crypto:btc x-parser-schema-id: examples: - type: leave room: pm:crypto:btc x-parser-schema-id: title: Leave crypto underlying description: Unsubscribe from Crypto Underlying example: |- { "type": "leave", "room": "pm:crypto:btc" } bindings: [] extensions: - id: x-parser-unique-object-id value: leaveCryptoUnderlying - id: x-parser-message-name value: leaveCryptoUnderlying 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: Crypto Underlying - id: x-parser-unique-object-id value: cryptoUnderlying 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: [] ````