> ## Documentation Index > Fetch the complete documentation index at: https://v3.docs.derive.xyz/llms.txt > Use this file to discover all available pages before exploring further. # Orderbook > Channel name: `orderbook.{instrument_name}.{group}.{depth}`. Public channel that periodically publishes aggregated bids and asks for a single instrument, where {instrument_name} is the market (e.g. ETH-PERP), {group} is the price-level aggregation size (1, 10, or 100), and {depth} is the number of levels returned per side (1, 10, 20, or 100). ## AsyncAPI ````yaml subscriptions.asyncapi.json orderbook id: orderbook title: Orderbook description: >- Channel name: `orderbook.{instrument_name}.{group}.{depth}`. Public channel that periodically publishes aggregated bids and asks for a single instrument, where {instrument_name} is the market (e.g. ETH-PERP), {group} is the price-level aggregation size (1, 10, or 100), and {depth} is the number of levels returned per side (1, 10, 20, or 100). servers: - id: production protocol: wss host: api.derive.xyz bindings: [] variables: [] - id: testnet protocol: wss host: testnet.api.derive.xyz bindings: [] variables: [] address: /v3/ws parameters: [] bindings: [] operations: - &ref_7 id: receive_orderbook title: Receive_orderbook type: send messages: - &ref_10 id: orderbookNotification payload: - name: orderbookNotification type: object properties: - name: asks type: array required: true properties: - name: amount type: string required: true - name: price type: string required: true - name: bids type: array required: true properties: - name: amount type: string required: true - name: price type: string required: true - name: instrument_name type: string required: true - name: publish_id type: integer required: true - name: timestamp type: integer required: true headers: [] jsonPayloadSchema: type: object required: - asks - bids - instrument_name - publish_id - timestamp properties: asks: type: array items: &ref_0 type: object required: - amount - price properties: amount: type: string x-parser-schema-id: price: type: string x-parser-schema-id: x-parser-schema-id: OrderSnapshot x-parser-schema-id: bids: type: array items: *ref_0 x-parser-schema-id: instrument_name: type: string x-parser-schema-id: publish_id: type: integer format: uint64 minimum: 0 x-parser-schema-id: timestamp: type: integer format: int64 x-parser-schema-id: x-parser-schema-id: OrderbookSnapshot title: Orderbook notification example: |- { "asks": { "amount": "", "price": "" }, "bids": { "amount": "", "price": "" }, "instrument_name": "", "publish_id": 123, "timestamp": 123 } bindings: [] extensions: - id: x-parser-unique-object-id value: orderbookNotification bindings: [] extensions: &ref_5 - id: x-parser-unique-object-id value: orderbook - &ref_6 id: send_subscribe_orderbook title: Send_subscribe_orderbook type: receive messages: - &ref_8 id: subscribeRequest payload: - name: subscribeRequest description: >- Send to subscribe: list this channel's address (with the {param} segments filled, e.g. orderbook.ETH-PERP.10.20) in params.channels. type: object properties: - name: headers type: &ref_1 - object - 'null' description: Non-standard; used by `auth/login`. required: false - name: id type: anyOf required: true - name: method type: string description: subscribe required: true - name: params type: object description: >- Params for `subscribe`. `channels` is the required list of channel names to subscribe to. required: true properties: - name: channels type: array required: true properties: - name: item type: string required: false headers: [] jsonPayloadSchema: type: object required: - id - method - params properties: headers: description: Non-standard; used by `auth/login`. type: *ref_1 additionalProperties: true x-parser-schema-id: id: &ref_3 anyOf: - type: string x-parser-schema-id: - type: number x-parser-schema-id: - type: 'null' x-parser-schema-id: x-parser-schema-id: JsonRpcId method: type: string const: subscribe x-parser-schema-id: params: description: >- Params for `subscribe`. `channels` is the required list of channel names to subscribe to. type: object required: - channels properties: channels: type: array items: type: string x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: SubscribeParams x-parser-schema-id: title: Subscribe request description: >- Send to subscribe: list this channel's address (with the {param} segments filled, e.g. orderbook.ETH-PERP.10.20) in params.channels. example: |- { "id": 1, "method": "subscribe", "params": { "channels": [ "orderbook.ETH-PERP.10.20" ] } } bindings: [] extensions: - id: x-parser-unique-object-id value: subscribeRequest - &ref_9 id: unsubscribeRequest payload: - name: unsubscribeRequest description: >- Send to unsubscribe: list the channel addresses to drop in params.channels, or omit it to unsubscribe from everything. type: object properties: - name: headers type: &ref_2 - object - 'null' description: Non-standard; used by `auth/login`. required: false - name: id type: anyOf required: true - name: method type: string description: unsubscribe required: true - name: params type: object description: >- Params for `unsubscribe`. `channels` is optional. When omitted (or null) the connection unsubscribes from all channels. required: true properties: - name: channels type: &ref_4 - array - 'null' required: false headers: [] jsonPayloadSchema: type: object required: - id - method - params properties: headers: description: Non-standard; used by `auth/login`. type: *ref_2 additionalProperties: true x-parser-schema-id: id: *ref_3 method: type: string const: unsubscribe x-parser-schema-id: params: description: >- Params for `unsubscribe`. `channels` is optional. When omitted (or null) the connection unsubscribes from all channels. type: object properties: channels: default: null type: *ref_4 items: type: string x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: UnsubscribeParams x-parser-schema-id: title: Unsubscribe request description: >- Send to unsubscribe: list the channel addresses to drop in params.channels, or omit it to unsubscribe from everything. example: |- { "method": "", "params": {} } bindings: [] extensions: - id: x-parser-unique-object-id value: unsubscribeRequest bindings: [] extensions: *ref_5 sendOperations: - *ref_6 receiveOperations: - *ref_7 sendMessages: - *ref_8 - *ref_9 receiveMessages: - *ref_10 extensions: - id: x-parser-unique-object-id value: orderbook securitySchemes: [] ```` ## Related topics - [Orderbook Trading](/trading/order-types.md) - [Place a new order](/api-reference/orderbook/place-a-new-order.md) - [Cancel an existing order and place a new one](/api-reference/orderbook/cancel-an-existing-order-and-place-a-new-one.md)