Injecting Dynamic IVR Prompts in Genesys Cloud Using Node.js

What You Will Build

• The code dynamically creates and updates Genesys Cloud prompts with variable binding, validates text against platform constraints, and triggers atomic audio compilation.
• This tutorial uses the Genesys Cloud Platform Client V2 SDK and the Prompt and Webhook APIs.
• All examples are written in Node.js with modern ES module syntax and strict error handling.

Prerequisites

• OAuth client type: Confidential Client (Client Credentials)
• Required scopes: prompt:write, prompt:read, webhook:write, webhook:read
• SDK version: @genesyscloud/platform-client-v2 ^14.0.0
• Runtime: Node.js 18+ (ESM enabled)
• External dependencies: @genesyscloud/platform-client-v2, axios, uuid

Authentication Setup

Genesys Cloud requires OAuth 2.0 client credentials authentication before accessing the Prompt API. The SDK handles token acquisition and refresh automatically when initialized with valid credentials.

import { PureCloudPlatformClientV2 } from '@genesyscloud/platform-client-v2';

const client = new PureCloudPlatformClientV2();

await client.auth.loginClientCredentials({
  clientId: process.env.GENESYS_CLIENT_ID,
  clientSecret: process.env.GENESYS_CLIENT_SECRET,
  environment: 'mypurecloud.com'
});

console.log('Authentication successful. Token expires at:', client.auth.getAccessTokenExpiration());

The SDK caches the access token in memory and automatically refreshes it before expiration. If the refresh fails, subsequent API calls throw a 401 error, which your error handler must catch and retry.

Implementation

Step 1: Construct and Validate Inject Payload

The inject payload must contain the flow UUID reference, prompt text matrix, and variable binding directives. Genesys Cloud enforces a maximum text length of 10,000 characters and imposes implicit memory constraints based on estimated audio duration. The validation function checks syntax, length, and estimated runtime memory usage before submission.

const MAX_PROMPT_LENGTH = 10000;
const MAX_AUDIO_DURATION_SECONDS = 60;
const WORDS_PER_SECOND = 2.5;

function validateInjectPayload(payload) {
  if (!payload.flowId || !payload.text || !payload.locale) {
    throw new Error('Missing required fields: flowId, text, locale');
  }

  if (payload.text.length > MAX_PROMPT_LENGTH) {
    throw new Error(`Prompt text exceeds maximum length limit of ${MAX_PROMPT_LENGTH} characters.`);
  }

  const wordCount = payload.text.split(/\s+/).length;
  const estimatedDuration = wordCount / WORDS_PER_SECOND;
  if (estimatedDuration > MAX_AUDIO_DURATION_SECONDS) {
    throw new Error(`Estimated audio duration exceeds runtime memory constraint of ${MAX_AUDIO_DURATION_SECONDS} seconds.`);
  }

  if (payload.useSSML) {
    const ssmlRegex = /^<speak>[\s\S]*<\/speak>$/;
    if (!ssmlRegex.test(payload.text)) {
      throw new Error('Invalid SSML structure. Must be wrapped in <speak> tags with valid closing tags.');
    }
  }

  return true;
}

This validation prevents injection failures caused by oversized payloads or malformed SSML. The function throws immediately if constraints are violated, allowing your application to correct the matrix before API submission.

Step 2: Atomic PATCH Operations and Audio Compilation

Genesys Cloud compiles TTS prompts asynchronously. After initial creation, you must use an atomic PATCH operation to update the text and version, which triggers the compilation pipeline and forces cache invalidation. The following function handles the update, polls for compilation status, and implements exponential backoff for 429 rate limit responses.

async function compileAndCachePrompt(promptApi, promptId, payload, maxRetries = 3) {
  const patchBody = {
    text: payload.text,
    locale: payload.locale,
    version: (payload.version || 1) + 1,
    useSSML: payload.useSSML || false
  };

  let attempts = 0;
  while (attempts < maxRetries) {
    try {
      const result = await promptApi.updatePrompt(promptId, patchBody);
      console.log(`PATCH successful. Prompt ID: ${promptId}, Version: ${result.version}`);
      return await waitForCompilation(promptApi, promptId);
    } catch (error) {
      attempts++;
      if (error.status === 429 && attempts < maxRetries) {
        const retryAfter = error.headers?.['retry-after'] || Math.pow(2, attempts);
        console.log(`Rate limit hit. Retrying in ${retryAfter} seconds...`);
        await new Promise(res => setTimeout(res, retryAfter * 1000));
        continue;
      }
      throw error;
    }
  }
}

async function waitForCompilation(promptApi, promptId, maxAttempts = 30) {
  for (let i = 0; i < maxAttempts; i++) {
    const prompt = await promptApi.getPrompt(promptId);
    if (prompt.status === 'ready') return prompt;
    if (prompt.status === 'failed') throw new Error(`Audio compilation failed: ${prompt.statusReason}`);
    await new Promise(res => setTimeout(res, 2000));
  }
  throw new Error('Compilation timed out after maximum polling attempts.');
}

HTTP Equivalent for PATCH Operation:

PATCH /api/v2/prompts/3a1b2c4d-5e6f-7890-abcd-ef1234567890 HTTP/1.1
Host: api.mypurecloud.com
Authorization: Bearer eyJ0eXAi...
Content-Type: application/json

{
  "text": "Thank you for calling {companyName}. Your call is important to us.",
  "locale": "en-US",
  "version": 2,
  "useSSML": false
}

Realistic Response:

{
  "id": "3a1b2c4d-5e6f-7890-abcd-ef1234567890",
  "name": "Dynamic Greeting v2",
  "text": "Thank you for calling {companyName}. Your call is important to us.",
  "locale": "en-US",
  "version": 2,
  "status": "compiling",
  "statusReason": null,
  "flowId": "8f7e6d5c-4b3a-2109-fedc-ba9876543210",
  "createdDate": "2024-05-10T14:30:00.000Z",
  "updatedDate": "2024-05-10T14:30:05.000Z"
}

The PATCH request updates the prompt version, which automatically triggers the audio compilation service. The response returns status: compiling initially. The polling loop waits until the status transitions to ready.

Step 3: Webhook Sync and Translation Alignment

External translation services require synchronization with prompt injection events. You register a webhook that triggers on prompt.status.changed. The webhook payload includes the prompt ID, status, and version, allowing your translation service to fetch the latest text and push localized variants back to Genesys Cloud.

async function registerTranslationWebhook(webhookApi, callbackUrl) {
  const webhookConfig = {
    name: 'Dynamic Prompt Translation Sync',
    description: 'Triggers external translation service on prompt updates',
    enabled: true,
    eventFilters: [{
      eventDefinition: 'prompt.status.changed',
      eventDefinitionVersion: 'V2',
      eventFilterType: 'eventDefinition'
    }],
    httpHeaders: {
      'Content-Type': 'application/json',
      'X-Source': 'genesys-prompt-injector'
    },
    url: callbackUrl,
    useSsl: true,
    timeoutSeconds: 30,
    retryAttempts: 3,
    retryWaitIntervalSeconds: 5
  };

  try {
    const createdWebhook = await webhookApi.createWebhook(webhookConfig);
    console.log(`Webhook registered. ID: ${createdWebhook.id}`);
    return createdWebhook;
  } catch (error) {
    if (error.status === 409) {
      console.log('Webhook already exists. Skipping creation.');
    } else {
      throw error;
    }
  }
}

When the compilation status changes, Genesys Cloud sends a POST request to your callback URL. Your external service must validate the webhook signature, fetch the prompt text via the API, run the translation pipeline, and optionally create new locale variants using the same injector module.

Complete Working Example

The following module combines validation, atomic compilation, webhook registration, latency tracking, and audit logging into a single production-ready class.

import { PureCloudPlatformClientV2 } from '@genesyscloud/platform-client-v2';

const MAX_PROMPT_LENGTH = 10000;
const MAX_AUDIO_DURATION_SECONDS = 60;
const WORDS_PER_SECOND = 2.5;

class PromptInjector {
  constructor(clientId, clientSecret, environment) {
    this.client = new PureCloudPlatformClientV2();
    this.clientId = clientId;
    this.clientSecret = clientSecret;
    this.environment = environment;
    this.promptApi = this.client.PromptApi();
    this.webhookApi = this.client.WebhookApi();
    this.metrics = { total: 0, success: 0, failures: 0, latencies: [] };
    this.auditLogs = [];
  }

  async initialize() {
    await this.client.auth.loginClientCredentials({
      clientId: this.clientId,
      clientSecret: this.clientSecret,
      environment: this.environment
    });
  }

  validatePayload(payload) {
    if (!payload.flowId || !payload.text || !payload.locale) {
      throw new Error('Missing required fields: flowId, text, locale');
    }
    if (payload.text.length > MAX_PROMPT_LENGTH) {
      throw new Error(`Prompt text exceeds maximum length limit of ${MAX_PROMPT_LENGTH} characters.`);
    }
    const wordCount = payload.text.split(/\s+/).length;
    const estimatedDuration = wordCount / WORDS_PER_SECOND;
    if (estimatedDuration > MAX_AUDIO_DURATION_SECONDS) {
      throw new Error(`Estimated audio duration exceeds runtime memory constraint of ${MAX_AUDIO_DURATION_SECONDS} seconds.`);
    }
    if (payload.useSSML) {
      const ssmlRegex = /^<speak>[\s\S]*<\/speak>$/;
      if (!ssmlRegex.test(payload.text)) {
        throw new Error('Invalid SSML structure. Must be wrapped in <speak> tags with valid closing tags.');
      }
    }
    return true;
  }

  async compileAndCachePrompt(promptId, payload) {
    const patchBody = {
      text: payload.text,
      locale: payload.locale,
      version: (payload.version || 1) + 1,
      useSSML: payload.useSSML || false
    };

    let attempts = 0;
    while (attempts < 3) {
      try {
        const result = await this.promptApi.updatePrompt(promptId, patchBody);
        return await this.waitForCompilation(promptId);
      } catch (error) {
        attempts++;
        if (error.status === 429 && attempts < 3) {
          const retryAfter = error.headers?.['retry-after'] || Math.pow(2, attempts);
          await new Promise(res => setTimeout(res, retryAfter * 1000));
          continue;
        }
        throw error;
      }
    }
  }

  async waitForCompilation(promptId) {
    for (let i = 0; i < 30; i++) {
      const prompt = await this.promptApi.getPrompt(promptId);
      if (prompt.status === 'ready') return prompt;
      if (prompt.status === 'failed') throw new Error(`Audio compilation failed: ${prompt.statusReason}`);
      await new Promise(res => setTimeout(res, 2000));
    }
    throw new Error('Compilation timed out.');
  }

  async injectPrompt(flowId, payload) {
    const startTime = Date.now();
    this.metrics.total++;
    const auditEntry = {
      timestamp: new Date().toISOString(),
      action: 'prompt_inject_start',
      flowId,
      locale: payload.locale,
      payloadId: payload.id
    };
    this.auditLogs.push(auditEntry);
    console.log(JSON.stringify(auditEntry));

    try {
      this.validatePayload(payload);

      const createdPrompt = await this.promptApi.createPrompt({
        name: payload.name || `Dynamic Prompt ${Date.now()}`,
        text: payload.text,
        locale: payload.locale,
        flowId: flowId,
        useSSML: payload.useSSML || false
      });

      await this.compileAndCachePrompt(createdPrompt.id, payload);

      const latency = Date.now() - startTime;
      this.metrics.success++;
      this.metrics.latencies.push(latency);

      const successLog = { ...auditEntry, action: 'prompt_inject_complete', status: 'success', latencyMs: latency, promptId: createdPrompt.id };
      this.auditLogs.push(successLog);
      console.log(JSON.stringify(successLog));

      return createdPrompt;
    } catch (error) {
      this.metrics.failures++;
      const latency = Date.now() - startTime;
      this.metrics.latencies.push(latency);

      const failureLog = { ...auditEntry, action: 'prompt_inject_failure', status: 'error', error: error.message, latencyMs: latency };
      this.auditLogs.push(failureLog);
      console.log(JSON.stringify(failureLog));
      throw error;
    }
  }

  async registerTranslationWebhook(callbackUrl) {
    const webhookConfig = {
      name: 'Dynamic Prompt Translation Sync',
      description: 'Triggers external translation service on prompt updates',
      enabled: true,
      eventFilters: [{
        eventDefinition: 'prompt.status.changed',
        eventDefinitionVersion: 'V2',
        eventFilterType: 'eventDefinition'
      }],
      httpHeaders: { 'Content-Type': 'application/json', 'X-Source': 'genesys-prompt-injector' },
      url: callbackUrl,
      useSsl: true,
      timeoutSeconds: 30,
      retryAttempts: 3,
      retryWaitIntervalSeconds: 5
    };

    try {
      return await this.webhookApi.createWebhook(webhookConfig);
    } catch (error) {
      if (error.status === 409) {
        console.log('Webhook already exists.');
        return null;
      }
      throw error;
    }
  }

  getMetrics() {
    const avgLatency = this.metrics.latencies.length ? this.metrics.latencies.reduce((a, b) => a + b, 0) / this.metrics.latencies.length : 0;
    const successRate = this.metrics.total ? (this.metrics.success / this.metrics.total) * 100 : 0;
    return {
      totalInjections: this.metrics.total,
      successRate: `${successRate.toFixed(2)}%`,
      averageLatencyMs: avgLatency.toFixed(2),
      failureCount: this.metrics.failures
    };
  }
}

export { PromptInjector };

Usage requires instantiating the class, calling initialize(), and invoking injectPrompt() with your payload matrix. The module automatically tracks latency, calculates success rates, and logs every injection attempt to this.auditLogs.

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: The OAuth token expired or the client credentials are invalid.
• Fix: Verify GENESYS_CLIENT_ID and GENESYS_CLIENT_SECRET. The SDK refreshes tokens automatically, but if the refresh endpoint returns 401, you must reinitialize the client.
• Code: Wrap API calls in a retry loop that catches 401 and calls await client.auth.loginClientCredentials() before retrying.

Error: 403 Forbidden

• Cause: The OAuth token lacks the required prompt:write or prompt:read scopes, or the user account does not have Platform Administrator privileges.
• Fix: Regenerate the OAuth token with explicit scopes. Verify the service account has access to the target organization and environment.
• Code: Check error.message for scope denial. Log the missing scope and abort injection.

Error: 429 Too Many Requests

• Cause: You exceeded the Prompt API rate limit (typically 100 requests per second per tenant).
• Fix: Implement exponential backoff. The SDK does not retry automatically, so your code must parse the retry-after header and delay subsequent calls.
• Code: The compileAndCachePrompt method already implements this pattern. Extract it into a generic retryWithBackoff utility for all API calls.

Error: 500 Internal Server Error (Compilation Failed)

• Cause: The TTS engine encountered an unsupported character set, malformed SSML, or exceeded memory allocation for the audio buffer.
• Fix: Validate SSML syntax before submission. Reduce prompt length. Check prompt.statusReason for engine-specific error codes.
• Code: The waitForCompilation function throws on status: failed. Capture the error, log prompt.statusReason, and trigger a fallback prompt.

Official References

• Prompt API Documentation
• Webhook API Documentation
• Platform Client V2 SDK Reference
• OAuth 2.0 Client Credentials Flow