> ## Documentation Index > Fetch the complete documentation index at: https://docs.arcus.xyz/llms.txt > Use this file to discover all available pages before exploring further. # Oracle prices > > **Endpoint:** `wss://api.testnet.arcus.xyz/v1/ws` — one socket multiplexes every channel and RPC request. Click **Connect**, then send the example subscribe message below to start receiving data. Per-market oracle price updates sourced from the on-chain slinky aggregator. Pushes a new price on each oracle update. ## AsyncAPI ````yaml api-reference/asyncapi.yaml oraclePrices id: oraclePrices title: Oracle prices description: > > **Endpoint:** `wss://api.testnet.arcus.xyz/v1/ws` — one socket multiplexes every channel and RPC request. Click **Connect**, then send the example subscribe message below to start receiving data. Per-market oracle price updates sourced from the on-chain slinky aggregator. Pushes a new price on each oracle update. servers: - id: testnet protocol: wss host: api.testnet.arcus.xyz bindings: [] variables: [] - id: mainnet protocol: wss host: api.arcus.xyz bindings: [] variables: [] address: /v1/ws?channel=oraclePrices parameters: [] bindings: [] operations: - &ref_2 id: subscribeOraclePrices title: Subscribe oracle prices type: receive messages: - &ref_4 id: subscribe contentType: application/json payload: - name: Subscribe to a market channel type: object properties: - name: type type: string description: subscribe required: true - name: channel type: string enumValues: - trades - oraclePrices - bbo required: true - name: id type: string description: Market display name (e.g. "BTC-USD"). required: true headers: [] jsonPayloadSchema: type: object required: - type - channel - id properties: type: type: string const: subscribe x-parser-schema-id: channel: type: string enum: - trades - oraclePrices - bbo x-parser-schema-id: id: type: string description: Market display name (e.g. "BTC-USD"). example: BTC-USD x-parser-schema-id: x-parser-schema-id: SubscribeByMarketPayload title: Subscribe to a market channel example: |- { "type": "subscribe", "channel": "trades", "id": "BTC-USD" } bindings: [] extensions: - id: x-parser-unique-object-id value: subscribe bindings: [] extensions: &ref_1 - id: x-parser-unique-object-id value: oraclePrices - &ref_3 id: receiveOraclePrices title: Receive oracle prices type: send messages: - &ref_5 id: update contentType: application/json payload: - allOf: &ref_0 - type: object description: Common envelope for all server-pushed channel messages. required: - type - channel properties: type: type: string enum: - subscribed - channel_data description: >- `subscribed` for the initial snapshot; `channel_data` for updates. x-parser-schema-id: channel: type: string description: Channel name. x-parser-schema-id: id: type: string description: >- Channel id (market or address). Absent for global channels. x-parser-schema-id: contents: type: object additionalProperties: true description: Channel-specific payload. Schema varies by channel. properties: {} x-parser-schema-id: x-parser-schema-id: ChannelDataEnvelope - type: object properties: type: const: channel_data x-parser-schema-id: contents: type: object required: - epochSeconds - prices properties: epochSeconds: type: integer format: int64 description: Unix timestamp in seconds for the batch. example: 1780410803 x-parser-schema-id: prices: type: array description: One entry per market updated in this batch. items: type: object required: - marketDisplayName - marketId - price - markPrice properties: marketDisplayName: type: string description: Display name / ticker (e.g. "BTC-USD"). example: SLV-USD x-parser-schema-id: marketId: type: integer minimum: 0 maximum: 65535 description: Perpetual market identifier (uint16). example: 20 x-parser-schema-id: price: type: string description: Latest oracle price (decimal string). example: '68.39' x-parser-schema-id: markPrice: type: string description: > Authoritative mark price stamped by go-core (decimal string). "0" means unavailable; callers must not fall back to `price`. example: '68.39' x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: OraclePricesUpdatePayload name: Oracle Price Update headers: [] jsonPayloadSchema: allOf: *ref_0 x-parser-schema-id: OraclePricesUpdatePayload title: Oracle Price Update example: |- { "type": "channel_data", "channel": "oraclePrices", "contents": { "epochSeconds": 1780410803, "prices": [ { "marketDisplayName": "SLV-USD", "marketId": 20, "price": "68.39", "markPrice": "68.39" }, { "marketDisplayName": "BTC-USD", "marketId": 1, "price": "94501.00", "markPrice": "94500.50" } ] } } bindings: [] extensions: - id: x-parser-unique-object-id value: update bindings: [] extensions: *ref_1 sendOperations: - *ref_2 receiveOperations: - *ref_3 sendMessages: - *ref_4 receiveMessages: - *ref_5 extensions: - id: x-parser-unique-object-id value: oraclePrices securitySchemes: [] ````