Genesys Cloud JS SDK: How to mute agent mic programmatically?

General Discussion
1

Trying to build a custom widget that lets supervisors mute an agent’s microphone during an active voice call. I’m using the Genesys Cloud JavaScript SDK (genesys-cloud-messaging-communication or similar voice module) but I can’t find a clear method to toggle the mute state without ending the call. I’ve looked through the conversation object and the call participant details, but most methods seem read-only or require server-side API calls which feel clunky for real-time UI interaction.

Here’s what I have so far:

const call = await sdkClient.ConversationsApi.getConversationCall(callId);
const participant = call.participants.find(p => p.id === agentId);
// participant.muted is true/false, but how do I CHANGE it?

I tried calling updateConversationCallParticipant but that requires the full participant object and feels heavy for a simple mute toggle. Is there a direct method like muteMic() or setMuted(true) on the participant or call object? The docs are sparse on client-side media control. I just need a clean way to flip that boolean and have the SDK handle the signaling. Any pointers?

2

You might be overcomplicating this by looking for a high-level “mute” method. The JS SDK usually exposes the underlying WebRTC peer connection or the specific participant controls directly. If you’re using the genesys-cloud-communication package, you typically interact with the active conversation instance.

Here’s how I usually handle it. You need to grab the current conversation from your SDK client, find the specific participant (which is usually you, or the agent if you’re supervising via BAC), and then call the mute function on that participant object.

import { GenesysCloudCommunication } from '@genesyscloud/communication';

// Assuming you have an initialized client and active conversation
const communicationClient = new GenesysCloudCommunication({
 clientId: 'your_client_id',
 redirectUri: 'http://localhost:3000/callback'
});

// 1. Get the active conversation
const activeConv = communicationClient.getActiveConversation();

if (activeConv) {
 // 2. Identify the participant. For self-mute, it's often the first local participant
 const participants = activeConv.getParticipants();
 const agentParticipant = participants.find(p => p.type === 'agent' && p.isLocal);

 if (agentParticipant) {
 try {
 // 3. Toggle mute state
 // Note: Check if 'mute' is a method or a property setter depending on SDK version
 await agentParticipant.mute(); 
 console.log("Agent mic muted programmatically.");
 } catch (error) {
 console.error("Failed to mute:", error);
 }
 } else {
 console.warn("No local agent participant found in conversation.");
 }
}

One thing to watch out for is the SDK version. Older versions sometimes required you to manipulate the MediaStream directly via getUserMedia constraints, but the newer @genesyscloud/communication abstractions should handle the signaling for you. Also, make sure your OAuth token has conversation:write scope, otherwise the client-side call might fail silently or throw a permissions error.

If you’re doing this for a supervisor muting an agent (Barge-and-Mute), that’s a different beast entirely. You’d probably need to use the REST API endpoint POST /api/v2/voice/conversations/{conversationId}/participants/{participantId}/mute because the JS SDK doesn’t always expose remote participant control methods for security reasons. Stick to the participant object if it’s the agent muting themselves.