How to Programmatically Mute and Unmute Agent Microphones in Genesys Cloud CX

What You Will Build

• A server-side script that sends real-time control signals to mute or unmute a specific agent’s microphone during an active conversation.
• Implementation uses the Genesys Cloud CX Conversations API (/api/v2/conversations/{conversationId}/control) with the platform-client JavaScript SDK.
• Language: JavaScript (Node.js) with async/await syntax and modern fetch alternatives via the official SDK.

Prerequisites

• OAuth Client Type: Client Credentials flow (Service Account) is recommended for server-side automation. If using a user context, use Authorization Code flow.
• Required Scopes:
  • conversation:write (Required to send control signals like mute/unmute).
  • conversation:read (Required to list active conversations if you need to identify the conversation ID dynamically).
• SDK Version: @genesyscloud/px-sdk v5.0.0 or later.
• Runtime: Node.js v18 or later.
• Dependencies:
  • @genesyscloud/px-sdk
  • dotenv (for managing secrets securely)

Authentication Setup

Genesys Cloud uses OAuth 2.0 for all API access. For server-side scripts that control agent states, the Client Credentials flow is the standard approach. This flow exchanges a Client ID and Client Secret for an Access Token.

The SDK handles the token exchange and refresh logic automatically when you initialize the PlatformClient. You do not need to manually manage token expiry times unless you are building a custom token cache for high-throughput applications.

Configuration File (.env)

Create a .env file in your project root. Replace the placeholders with your actual Genesys Cloud credentials.

GENESYS_CLIENT_ID=your_client_id_here
GENESYS_CLIENT_SECRET=your_client_secret_here
GENESYS_REGION=mypurecloud.ie

SDK Initialization Code

Initialize the SDK with your environment variables. The setEnvironment method ensures the SDK points to the correct data center (e.g., mypurecloud.ie, mypurecloud.com, au02).

require('dotenv').config();
const { PlatformClient } = require('@genesyscloud/px-sdk');

// Initialize the platform client
const platformClient = new PlatformClient();

// Set the environment based on your Genesys Cloud region
// Common regions: mypurecloud.ie, mypurecloud.com, au02, eu05, etc.
platformClient.setEnvironment(process.env.GENESYS_REGION);

// Configure the OAuth client credentials
platformClient.authClient.configure({
    clientId: process.env.GENESYS_CLIENT_ID,
    clientSecret: process.env.CLIENT_SECRET,
    grantType: 'client_credentials'
});

// Optional: Set default headers if required by your organization's proxy
// platformClient.setDefaultHeader('X-Proxy-Authorization', 'Bearer ...');

console.log('SDK Initialized and authenticated.');

Implementation

To mute or unmute an agent, you must interact with the specific Conversation resource. Genesys Cloud treats every interaction (voice, chat, video) as a conversation. The control signal is sent via a POST request to the /control endpoint of that conversation.

Step 1: Identify the Active Conversation

Before you can send a control signal, you need the conversationId. In a production scenario, this ID is usually passed from your IVR or CRM integration. For this tutorial, we will demonstrate how to find an active voice conversation for a specific user.

Endpoint: GET /api/v2/conversations/active
Scope: conversation:read

/**
 * Finds an active voice conversation for a specific user.
 * @param {string} userId - The Genesys Cloud User ID (UUID).
 * @returns {Promise<string|null>} - The conversation ID or null if none found.
 */
async function findActiveVoiceConversation(userId) {
    try {
        // The Conversations API allows filtering by participant ID
        const response = await platformClient.conversationsApi.postConversationsActive({
            body: {
                participantIds: [userId],
                conversationType: 'voice'
            }
        });

        if (response.body.conversations && response.body.conversations.length > 0) {
            const conversation = response.body.conversations[0];
            console.log(`Found active conversation: ${conversation.id}`);
            return conversation.id;
        } else {
            console.log('No active voice conversations found for this user.');
            return null;
        }
    } catch (error) {
        console.error('Error fetching active conversations:', error.body || error.message);
        throw error;
    }
}

Step 2: Send the Mute/Unmute Control Signal

The core logic resides in the POST /api/v2/conversations/{conversationId}/control endpoint. This endpoint accepts a JSON body specifying the type of control and the target participant.

Endpoint: POST /api/v2/conversations/{conversationId}/control
Scope: conversation:write

The controlType can be mute or unmute. The participantId must match the UUID of the agent you wish to control.

The Control Payload Structure

{
  "controlType": "mute",
  "participantId": "agent-uuid-goes-here"
}

Implementation Code

This function encapsulates the API call. It includes robust error handling for common HTTP status codes.

/**
 * Sends a mute or unmute signal to a specific participant in a conversation.
 * @param {string} conversationId - The UUID of the active conversation.
 * @param {string} participantId - The UUID of the agent to mute/unmute.
 * @param {string} action - Either 'mute' or 'unmute'.
 */
async function controlAgentMicrophone(conversationId, participantId, action) {
    if (!['mute', 'unmute'].includes(action)) {
        throw new Error('Invalid action. Must be "mute" or "unmute".');
    }

    try {
        const response = await platformClient.conversationsApi.postConversationsConversationIdControl(
            conversationId,
            {
                body: {
                    controlType: action,
                    participantId: participantId
                }
            }
        );

        // The API returns 202 Accepted for asynchronous control operations
        if (response.statusCode === 202) {
            console.log(`Successfully sent ${action} signal to participant ${participantId} in conversation ${conversationId}.`);
            return true;
        } else {
            console.warn(`Unexpected status code: ${response.statusCode}`);
            return false;
        }

    } catch (error) {
        const statusCode = error.statusCode || error.body?.statusCode;
        const message = error.body?.message || error.message;

        if (statusCode === 404) {
            console.error('Not Found: The conversation or participant ID is invalid or the conversation has ended.');
        } else if (statusCode === 403) {
            console.error('Forbidden: The authenticated service account lacks the "conversation:write" scope or permission.');
        } else if (statusCode === 429) {
            console.error('Rate Limited: Too many requests. Implement exponential backoff.');
        } else {
            console.error(`Error controlling microphone: [${statusCode}] ${message}`);
        }
        
        throw error;
    }
}

Step 3: Orchestrating the Workflow

In a real-world application, you might trigger this action via a webhook from your CRM when a support ticket status changes, or from a supervisor dashboard. This section combines the previous steps into a single executable workflow.

/**
 * Main execution function.
 */
async function main() {
    const AGENT_USER_ID = process.env.AGENT_USER_ID; // UUID of the agent to control
    const ACTION = process.env.CONTROL_ACTION || 'mute'; // Default to mute if not specified

    if (!AGENT_USER_ID) {
        console.error('AGENT_USER_ID environment variable is required.');
        process.exit(1);
    }

    try {
        // Step 1: Find the active conversation
        const conversationId = await findActiveVoiceConversation(AGENT_USER_ID);

        if (!conversationId) {
            console.log('Cannot proceed: No active conversation found.');
            return;
        }

        // Step 2: Send the control signal
        // Note: The participantId in the control payload is usually the same as the userId
        // for standard agent scenarios, but verify via the conversation details if using
        // complex routing or external callers.
        await controlAgentMicrophone(conversationId, AGENT_USER_ID, ACTION);

    } catch (error) {
        console.error('Fatal error in workflow:', error);
        process.exit(1);
    }
}

// Run the main function
main();

Complete Working Example

Below is the complete, copy-pasteable Node.js script. Save this as mute-agent.js. Ensure you have installed the dependencies (npm install @genesyscloud/px-sdk dotenv) and configured your .env file.

require('dotenv').config();
const { PlatformClient } = require('@genesyscloud/px-sdk');

// Initialize the platform client
const platformClient = new PlatformClient();

// Set the environment based on your Genesys Cloud region
// Common regions: mypurecloud.ie, mypurecloud.com, au02, eu05, etc.
if (!process.env.GENESYS_REGION) {
    console.error('GENESYS_REGION environment variable is required.');
    process.exit(1);
}
platformClient.setEnvironment(process.env.GENESYS_REGION);

// Configure the OAuth client credentials
platformClient.authClient.configure({
    clientId: process.env.GENESYS_CLIENT_ID,
    clientSecret: process.env.GENESYS_CLIENT_SECRET,
    grantType: 'client_credentials'
});

/**
 * Finds an active voice conversation for a specific user.
 * @param {string} userId - The Genesys Cloud User ID (UUID).
 * @returns {Promise<string|null>} - The conversation ID or null if none found.
 */
async function findActiveVoiceConversation(userId) {
    try {
        // The Conversations API allows filtering by participant ID
        const response = await platformClient.conversationsApi.postConversationsActive({
            body: {
                participantIds: [userId],
                conversationType: 'voice'
            }
        });

        if (response.body.conversations && response.body.conversations.length > 0) {
            const conversation = response.body.conversations[0];
            console.log(`Found active conversation: ${conversation.id}`);
            return conversation.id;
        } else {
            console.log('No active voice conversations found for this user.');
            return null;
        }
    } catch (error) {
        console.error('Error fetching active conversations:', error.body || error.message);
        throw error;
    }
}

/**
 * Sends a mute or unmute signal to a specific participant in a conversation.
 * @param {string} conversationId - The UUID of the active conversation.
 * @param {string} participantId - The UUID of the agent to mute/unmute.
 * @param {string} action - Either 'mute' or 'unmute'.
 */
async function controlAgentMicrophone(conversationId, participantId, action) {
    if (!['mute', 'unmute'].includes(action)) {
        throw new Error('Invalid action. Must be "mute" or "unmute".');
    }

    try {
        const response = await platformClient.conversationsApi.postConversationsConversationIdControl(
            conversationId,
            {
                body: {
                    controlType: action,
                    participantId: participantId
                }
            }
        );

        // The API returns 202 Accepted for asynchronous control operations
        if (response.statusCode === 202) {
            console.log(`Successfully sent ${action} signal to participant ${participantId} in conversation ${conversationId}.`);
            return true;
        } else {
            console.warn(`Unexpected status code: ${response.statusCode}`);
            return false;
        }

    } catch (error) {
        const statusCode = error.statusCode || error.body?.statusCode;
        const message = error.body?.message || error.message;

        if (statusCode === 404) {
            console.error('Not Found: The conversation or participant ID is invalid or the conversation has ended.');
        } else if (statusCode === 403) {
            console.error('Forbidden: The authenticated service account lacks the "conversation:write" scope or permission.');
        } else if (statusCode === 429) {
            console.error('Rate Limited: Too many requests. Implement exponential backoff.');
        } else {
            console.error(`Error controlling microphone: [${statusCode}] ${message}`);
        }
        
        throw error;
    }
}

/**
 * Main execution function.
 */
async function main() {
    const AGENT_USER_ID = process.env.AGENT_USER_ID; // UUID of the agent to control
    const ACTION = process.env.CONTROL_ACTION || 'mute'; // Default to mute if not specified

    if (!AGENT_USER_ID) {
        console.error('AGENT_USER_ID environment variable is required.');
        process.exit(1);
    }

    try {
        // Step 1: Find the active conversation
        const conversationId = await findActiveVoiceConversation(AGENT_USER_ID);

        if (!conversationId) {
            console.log('Cannot proceed: No active conversation found.');
            return;
        }

        // Step 2: Send the control signal
        await controlAgentMicrophone(conversationId, AGENT_USER_ID, ACTION);

    } catch (error) {
        console.error('Fatal error in workflow:', error);
        process.exit(1);
    }
}

// Run the main function
main();

Common Errors & Debugging

Error: 403 Forbidden

Cause: The OAuth token used for the API call does not have the conversation:write scope.
Fix:

1. Navigate to the Genesys Cloud Admin Console.
2. Go to Administration > Security > OAuth 2.0 Clients.
3. Select your client.
4. Ensure conversation:write is checked under Scopes.
5. Generate a new token or restart your application to pick up the new permissions.

Error: 404 Not Found

Cause: The conversationId or participantId provided in the payload is invalid, or the conversation has already ended.
Fix:

1. Verify the conversationId is active by checking the Conversation Details API.
2. Ensure the participantId matches the exact UUID of the participant in the conversation. Note that external callers may have different participant IDs than internal users.
3. Check if the conversation has already concluded. Control signals cannot be sent to ended conversations.

Error: 429 Too Many Requests

Cause: You have exceeded the rate limit for the Conversations API. Genesys Cloud enforces strict rate limits to protect platform stability.
Fix:

1. Implement exponential backoff in your retry logic.
2. Review the Retry-After header in the response body.
3. Batch operations where possible, though mute/unmute are inherently real-time and cannot be batched.

Error: “Control signal failed to apply”

Cause: The agent’s client (Desktop or Web) may not be in a state to accept the control signal (e.g., the agent is not in a call, or the call is in a transfer state).
Fix:

1. Ensure the agent is actively in a voice conversation.
2. Check if the conversation is in a transfer or hold state where microphone control might be restricted by business rules.

Official References

• Genesys Cloud Conversations API Documentation
• POST /api/v2/conversations/{conversationId}/control
• Genesys Cloud Node.js SDK Reference
• OAuth 2.0 Client Credentials Flow