> ## 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. # Peer_to_peer > Peer to Peer WebRTC [Compose Session Token](/api-reference/compose-session-token) is sent as query parameter string enableSFU is a query parameter boolean to opt into sending the traffic through cloudflare network for improved reliability First message must be offer. Offer must be provided within 30 seconds of opening the websocket. Once offer is sent, a corresponding answer will be sent from the server which can be used as described [here](https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/setRemoteDescription) ## AsyncAPI ````yaml api-reference/asyncapi.yaml peer_to_peer id: peer_to_peer title: Peer_to_peer description: > Peer to Peer WebRTC [Compose Session Token](/api-reference/compose-session-token) is sent as query parameter string enableSFU is a query parameter boolean to opt into sending the traffic through cloudflare network for improved reliability First message must be offer. Offer must be provided within 30 seconds of opening the websocket. Once offer is sent, a corresponding answer will be sent from the server which can be used as described [here](https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/setRemoteDescription) 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/p2p parameters: [] bindings: [] operations: - &ref_3 id: sendOffer title: Send offer type: receive messages: - &ref_10 id: offer contentType: text/plain payload: - name: offer description: >- RTC Offer as generated by https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/createOffer or compatible type: object properties: - name: type type: string description: offer required: false - name: sdp type: string required: false headers: [] jsonPayloadSchema: schema: type: object properties: type: type: string const: offer x-parser-schema-id: sdp: type: string x-parser-schema-id: x-parser-schema-id: title: Offer description: >- RTC Offer as generated by https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/createOffer or compatible example: |- { "type": "", "sdp": "" } bindings: [] extensions: - id: x-parser-unique-object-id value: offer - id: x-parser-message-name value: rtc_offer bindings: [] extensions: &ref_0 - id: x-parser-unique-object-id value: peer_to_peer - &ref_7 id: recvAnswer title: Recv answer type: send messages: - &ref_14 id: answer contentType: text/plain payload: - name: answer description: >- RTC Answer as generated by https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/createAnswer or compatible. Will be received AFTER an offer has been sent type: object properties: - name: type type: string description: answer required: false - name: sdp type: string required: false headers: [] jsonPayloadSchema: schema: type: object properties: type: type: string const: answer x-parser-schema-id: sdp: type: string x-parser-schema-id: x-parser-schema-id: title: Answer description: >- RTC Answer as generated by https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/createAnswer or compatible. Will be received AFTER an offer has been sent example: |- { "type": "", "sdp": "" } bindings: [] extensions: - id: x-parser-unique-object-id value: answer - id: x-parser-message-name value: rtc_answer bindings: [] extensions: *ref_0 - &ref_4 id: sendAudioChunk_peer_to_peer title: Send audio chunk_peer_to_peer type: receive messages: - &ref_11 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_5 id: clearBuffer_peer_to_peer title: Clear buffer_peer_to_peer type: receive messages: - &ref_12 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_6 id: finalMessage_peer_to_peer title: Final message_peer_to_peer type: receive messages: - &ref_13 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_8 id: event_peer_to_peer title: Event_peer_to_peer type: send messages: - &ref_15 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_9 id: error_peer_to_peer title: Error_peer_to_peer type: send messages: - &ref_16 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 - *ref_6 receiveOperations: - *ref_7 - *ref_8 - *ref_9 sendMessages: - *ref_10 - *ref_11 - *ref_12 - *ref_13 receiveMessages: - *ref_14 - *ref_15 - *ref_16 extensions: - id: x-parser-unique-object-id value: peer_to_peer securitySchemes: [] ````