> ## Documentation Index > Fetch the complete documentation index at: https://docs.simli.com/llms.txt > Use this file to discover all available pages before exploring further. # Livekit > Livekit Backed WebRTC [Compose Session Token](/api-reference/compose-session-token) is sent as query parameter string No first message is required. However, You must successfully join the livekit room within 30 seconds ## AsyncAPI ````yaml api-reference/asyncapi.yaml livekit id: livekit title: Livekit description: > Livekit Backed WebRTC [Compose Session Token](/api-reference/compose-session-token) is sent as query parameter string No first message is required. However, You must successfully join the livekit room within 30 seconds servers: - id: Simli WSS protocol: wss host: api.simli.ai bindings: [] variables: - id: session_token description: Session token generated by https://api.simli.ai/compose/token allowedValues: [] examples: [] address: /compose/webrtc/livekit parameters: [] bindings: [] operations: - &ref_6 id: recvLivekitInfo title: Recv livekit info type: send messages: - &ref_12 id: livekit_join_info contentType: text/plain payload: - name: livekit_join_info description: >- Room info and join token that are used by the client to join a livekit room that hosts the avatar session type: object properties: - name: livekit_url type: string required: false - name: livekit_token type: string required: false headers: [] jsonPayloadSchema: schema: type: object properties: livekit_url: type: string x-parser-schema-id: livekit_token: type: string x-parser-schema-id: x-parser-schema-id: title: Livekit_join_info description: >- Room info and join token that are used by the client to join a livekit room that hosts the avatar session example: |- { "livekit_url": "", "livekit_token": "" } bindings: [] extensions: - id: x-parser-unique-object-id value: livekit_join_info - id: x-parser-message-name value: livekit_join_info bindings: [] extensions: &ref_0 - id: x-parser-unique-object-id value: livekit - &ref_3 id: sendAudioChunk_livekit title: Send audio chunk_livekit type: receive messages: - &ref_9 id: audio_chunk contentType: application/octet-stream payload: - type: string format: bytestring x-parser-schema-id: name: audio_chunk description: >- Binary stream of the audio that the Avatar will lipsync to. Sent as a binary stream (in JS/TS UInt8Arr) headers: [] jsonPayloadSchema: schema: type: string format: bytestring x-parser-schema-id: title: Audio_chunk description: >- Binary stream of the audio that the Avatar will lipsync to. Sent as a binary stream (in JS/TS UInt8Arr) example: '{}' bindings: [] extensions: - id: x-parser-unique-object-id value: audio_chunk - id: x-parser-message-name value: audio_chunk bindings: [] extensions: *ref_0 - &ref_4 id: clearBuffer_livekit title: Clear buffer_livekit type: receive messages: - &ref_10 id: clear_buffer contentType: text/plain payload: - type: string const: SKIP x-parser-schema-id: name: clear_buffer description: >- Client Signal to make the avatar stop speaking immediately and ignore all previously sent audio headers: [] jsonPayloadSchema: schema: type: string const: SKIP x-parser-schema-id: title: Clear_buffer description: >- Client Signal to make the avatar stop speaking immediately and ignore all previously sent audio example: '{}' bindings: [] extensions: - id: x-parser-unique-object-id value: clear_buffer - id: x-parser-message-name value: clear_buffer bindings: [] extensions: *ref_0 - &ref_5 id: finalMessage_livekit title: Final message_livekit type: receive messages: - &ref_11 id: final_message contentType: text/plain payload: - type: string const: DONE x-parser-schema-id: name: final_message description: >- Client Signal to tell the server that the final segment of audio has been already sent and that it should close after playing it back headers: [] jsonPayloadSchema: schema: type: string const: DONE x-parser-schema-id: title: Final_message description: >- Client Signal to tell the server that the final segment of audio has been already sent and that it should close after playing it back example: '{}' bindings: [] extensions: - id: x-parser-unique-object-id value: final_message - id: x-parser-message-name value: final_message bindings: [] extensions: *ref_0 - &ref_7 id: event_livekit title: Event_livekit type: send messages: - &ref_13 id: event contentType: text/plain payload: - type: string enum: &ref_1 - START - ACK - STOP - SPEAK - SILENT x-parser-schema-id: name: event description: Server sent signals headers: [] jsonPayloadSchema: schema: type: string enum: *ref_1 x-parser-schema-id: title: Event description: Server sent signals example: '{}' bindings: [] extensions: - id: x-parser-unique-object-id value: event - id: x-parser-message-name value: event bindings: [] extensions: *ref_0 - &ref_8 id: error_livekit title: Error_livekit type: send messages: - &ref_14 id: error contentType: text/plain payload: - type: string oneOf: &ref_2 - pattern: ^(?i)ERROR\s+.+$ description: Matches 'ERROR' regardless of casing. x-parser-schema-id: - pattern: ^(?i)RATE\s+.+$ description: Matches 'RATE' followed by a space. x-parser-schema-id: - pattern: ^(?i)CLOSING\s+.+$ description: Matches 'CLOSING' followed by a space. x-parser-schema-id: x-parser-schema-id: name: error description: >- Termination messages that specify the reason for immediate termination headers: [] jsonPayloadSchema: schema: type: string oneOf: *ref_2 x-parser-schema-id: example: 'ERROR: INVALID_API_KEY' title: Error description: Termination messages that specify the reason for immediate termination example: '{}' bindings: [] extensions: - id: x-parser-unique-object-id value: error - id: x-parser-message-name value: error bindings: [] extensions: *ref_0 sendOperations: - *ref_3 - *ref_4 - *ref_5 receiveOperations: - *ref_6 - *ref_7 - *ref_8 sendMessages: - *ref_9 - *ref_10 - *ref_11 receiveMessages: - *ref_12 - *ref_13 - *ref_14 extensions: - id: x-parser-unique-object-id value: livekit securitySchemes: [] ````