Muting agent mic via Genesys Cloud Web SDK v2 without triggering UI update

Hey everyone. I’m building a custom integration where we need to programmatically mute and unmute an agent’s microphone during an active voice call using the Genesys Cloud Web SDK (v2). The goal is to have this happen silently in the background based on external signals from our OTel tracing pipeline, without forcing the native SDK UI to flash or update its state immediately.

Here’s the setup. We’ve initialized the PureCloudPlatformClientV2 and established a connection. When a call starts, we get the conversation object. I’ve been trying to use the audio property on the participant object, but it seems read-only in the current context.

const sdk = new PureCloudPlatformClientV2();
sdk.loginOAuthClientCredentials({
 clientId: process.env.GC_CLIENT_ID,
 clientSecret: process.env.GC_CLIENT_SECRET
}).then(() => {
 // Connection established
});

// Inside the call event listener
sdk.conversations.calls.getParticipant({
 conversationId: event.conversationId,
 participantId: event.participantId
}).then((participant) => {
 console.log('Current mute state:', participant.muted);
 // How do I toggle this? 
 // participant.muted = true; // Error: Assignment to read-only property
});

I tried calling sdk.conversations.calls.putConversationParticipantMute directly, but it returns a 403 Forbidden because the OAuth token used for the SDK initialization doesn’t seem to have the conversation:participant:write scope applied correctly for this specific action, or maybe I’m missing a step in the authentication flow for real-time actions.

Is there a specific method on the Call or Participant object in the v2 SDK that handles mute toggling? Or do I need to use a different approach, like posting to the /api/v2/conversations/calls/{conversationId}/participants/{participantId}/mute endpoint manually? If I do that, will it break the SDK’s internal state tracking?

I’ve checked the docs, but they’re pretty sparse on real-time control methods. Any pointers would be appreciated.

You’re fighting the SDK’s internal state machine. That’s your problem. The Web SDK v2 is built to keep the UI and the backend in sync. If you mute via the API, the WebSocket pushes an update, and the UI reacts. You can’t really stop that without breaking the connection state.

If you want to avoid the UI flash, you’re probably better off not using the Web SDK for the mute action at all. Use the REST API to toggle the mute status, but you’ll still need to handle the UI state yourself. Or, if you’re using the Web Components, you can try intercepting the event before it bubbles to the DOM, but that’s fragile.

Here’s the REST approach. It’s blunt, but it works. You don’t need the SDK for this part.

const muteAgent = async (conversationId, participantId) => {
 const token = await getAccessToken(); // Your auth logic
 
 const response = await fetch(
 `https://api.mypurecloud.com/api/v2/conversations/voice/${conversationId}/participants/${participantId}`,
 {
 method: 'PUT',
 headers: {
 'Authorization': `Bearer ${token}`,
 'Content-Type': 'application/json'
 },
 body: JSON.stringify({
 muted: true,
 // Keep other properties like status if needed, 
 // but PUT replaces the whole object usually. 
 // Check the docs for partial updates if PUT is too heavy.
 // Actually, use PATCH if available for partial updates. 
 // Genesys supports PATCH for participant updates.
 })
 }
 );

 if (!response.ok) {
 throw new Error(`Mute failed: ${response.statusText}`);
 }
};

Wait, check the endpoint. PUT replaces. You might want PATCH to just change the muted flag.

// Better approach: PATCH
const response = await fetch(
 `https://api.mypurecloud.com/api/v2/conversations/voice/${conversationId}/participants/${participantId}`,
 {
 method: 'PATCH',
 headers: {
 'Authorization': `Bearer ${token}`,
 'Content-Type': 'application/json'
 },
 body: JSON.stringify({
 muted: true
 })
 }
);

Even with PATCH, the WebSocket will likely push a conversation.participant.updated event. Your UI will hear it. If you’re using the Web Components, that event triggers a re-render. You’d have to unsubscribe the component from that specific event source or override the component’s event handler, which is a hack.

If you need it truly silent, you might have to render your own mute button that calls the API and then manually updates a local state variable that the UI reads, ignoring the SDK’s global state for that specific control. It’s messy.

The SDK isn’t designed for silent background mutations. It’s designed for interactive agents. If your OTel pipeline is triggering mutes, consider if the agent should even be aware of it. If they need to know, the UI flash is a feature, not a bug. It tells them they’re muted.

If you really need to suppress it, look into the platformClient.ConversationsApi and see if there’s a way to disable UI binding for specific events. I don’t think there is. You’ll probably end up building a thin wrapper around the API calls that manages its own UI state, completely decoupled from the Web SDK’s internal store.