Creating Genesys Cloud Outbound Campaign Lists via REST API with Java

What You Will Build

• This tutorial builds a Java utility that programmatically creates Genesys Cloud Outbound campaign lists with contact ID arrays, deduplication key matrices, and data source directives.
• It uses the Genesys Cloud Outbound API (POST /api/v2/outbound/lists) and the official Java SDK to handle payload construction, validation, and registration.
• The implementation covers Java 17+ with the genesyscloud-sdk dependency, webhook synchronization, audit logging, and performance tracking.

Prerequisites

• OAuth 2.0 Client Credentials grant with scopes: outbound:list:create, outbound:list:read, outbound:webhook:create, outbound:job:read
• Genesys Cloud Java SDK version 140.0.0 or newer
• Java 17 runtime environment
• Maven or Gradle build system
• Dependencies: com.genesyscloud:genesyscloud-sdk, com.fasterxml.jackson.core:jackson-databind, org.slf4j:slf4j-api

Authentication Setup

The Genesys Cloud Java SDK handles token acquisition, caching, and automatic refresh when configured with a ClientCredentialsOAuthClient. You must specify the exact environment and required scopes to avoid 401 Unauthorized or 403 Forbidden responses during list creation.

import com.genesyscloud.platform.client.v2.auth.ClientCredentialsOAuthClient;
import com.genesyscloud.platform.client.v2.auth.OAuthClient;
import com.genesyscloud.platform.client.v2.client.Configuration;
import com.genesyscloud.platform.client.v2.client.PureCloudPlatformClientV2;
import com.genesyscloud.platform.client.v2.api.OutboundApi;
import com.genesyscloud.platform.client.v2.api.WebhookApi;
import java.util.Arrays;

public class GenesysAuthSetup {
    public static PureCloudPlatformClientV2 buildClient(String clientId, String clientSecret, String environment) {
        Configuration config = new Configuration.Builder()
            .environment(environment)
            .build();

        OAuthClient oauthClient = new ClientCredentialsOAuthClient.Builder()
            .clientId(clientId)
            .clientSecret(clientSecret)
            .authHost("https://api." + environment)
            .scopes(Arrays.asList(
                "outbound:list:create",
                "outbound:list:read",
                "outbound:webhook:create",
                "outbound:job:read"
            ))
            .build();

        return new PureCloudPlatformClientV2.Builder()
            .configuration(config)
            .authClient(oauthClient)
            .build();
    }
}

The SDK caches the access token in memory and automatically requests a new token when the current one expires. You do not need to implement manual refresh logic. The token lifetime defaults to 3600 seconds.

Implementation

Step 1: Construct List Payload with Contact Arrays and Deduplication Matrices

Genesys Cloud validates list payloads against strict schema constraints before ingestion. The ListCreateRequest object requires a contact type, data source configuration, and deduplication directives. You must enforce contact count limits and concurrent list thresholds before sending the request to prevent 400 Bad Request rejections.

import com.genesyscloud.platform.client.v2.api.model.*;
import java.util.List;
import java.util.regex.Pattern;

public class ListPayloadBuilder {
    private static final int MAX_CONTACTS = 100000;
    private static final Pattern PHONE_PATTERN = Pattern.compile("^\\+?[1-9]\\d{1,14}$");

    public static ListCreateRequest buildPayload(String listName, List<String> contactIds) {
        if (contactIds == null || contactIds.isEmpty()) {
            throw new IllegalArgumentException("Contact array cannot be empty");
        }
        if (contactIds.size() > MAX_CONTACTS) {
            throw new IllegalArgumentException("Contact count exceeds maximum limit of " + MAX_CONTACTS);
        }

        ListCreateRequest request = new ListCreateRequest();
        request.setName(listName);
        request.setContactType("PHONE");

        ListDataSource dataSource = new ListDataSource();
        dataSource.setSourceType("INTERNAL");
        dataSource.setSourceId("campaign_contacts_" + System.currentTimeMillis());
        
        ListFormatField formatField = new ListFormatField();
        formatField.setFieldName("phone");
        formatField.setFormat("PHONE");
        formatField.setRequired(true);
        dataSource.setFormat(List.of(formatField));
        
        request.setDataSources(List.of(dataSource));

        ListDeduplicationKey dedupKey = new ListDeduplicationKey();
        dedupKey.setKeyField("phone");
        dedupKey.setKeyType("PHONE");
        request.setDeduplicationKey(dedupKey);
        request.setRemoveDuplicates(true);

        return request;
    }

    public static void validateContacts(List<String> contacts) {
        for (String contact : contacts) {
            if (!PHONE_PATTERN.matcher(contact).matches()) {
                throw new IllegalArgumentException("Invalid phone format: " + contact + ". Must follow E.164 standard.");
            }
        }
    }
}

The payload construction enforces E.164 phone normalization at the client level. Genesys Cloud performs server-side normalization and regulatory filtering, but pre-validation reduces failed ingestion attempts. The removeDuplicates flag triggers automatic duplicate removal during processing. The deduplication key matrix tells the platform which field to use for collision detection.

Step 2: Register List and Handle Asynchronous Job Processing

List registration returns a ListResponse immediately, but data processing occurs asynchronously. You must poll the job status to verify format verification and duplicate removal completion. The code below implements exponential backoff retry logic for 429 Too Many Requests responses and tracks creation latency.

import com.genesyscloud.platform.client.v2.api.model.*;
import com.genesyscloud.platform.client.v2.api.OutboundApi;
import com.genesyscloud.platform.client.v2.api.exception.ApiException;
import java.time.Instant;
import java.util.concurrent.TimeUnit;

public class ListRegistrationHandler {
    private final OutboundApi outboundApi;

    public ListRegistrationHandler(OutboundApi outboundApi) {
        this.outboundApi = outboundApi;
    }

    public ListResponse createList(ListCreateRequest payload) throws ApiException, InterruptedException {
        Instant startTime = Instant.now();
        ListResponse response = null;
        int maxRetries = 3;
        long backoffMs = 1000;

        for (int attempt = 1; attempt <= maxRetries; attempt++) {
            try {
                response = outboundApi.postOutboundLists(payload, null, null, null, null, null);
                break;
            } catch (ApiException e) {
                if (e.getCode() == 429 && attempt < maxRetries) {
                    System.out.println("Rate limited (429). Retrying in " + backoffMs + "ms. Attempt " + attempt);
                    TimeUnit.MILLISECONDS.sleep(backoffMs);
                    backoffMs *= 2;
                } else {
                    throw e;
                }
            }
        }

        if (response == null) {
            throw new ApiException("Failed to create list after " + maxRetries + " retries");
        }

        long latencyMs = java.time.Duration.between(startTime, Instant.now()).toMillis();
        System.out.println("List created. ID: " + response.getId() + " | Latency: " + latencyMs + "ms");
        return response;
    }

    public void waitForProcessing(String listId) throws ApiException, InterruptedException {
        int maxChecks = 30;
        for (int i = 0; i < maxChecks; i++) {
            ListResponse status = outboundApi.getOutboundList(listId, null, null);
            if ("COMPLETE".equals(status.getStatus())) {
                System.out.println("List processing complete. Duplicates removed: " + status.getDeduplicatedCount());
                return;
            }
            if ("FAILED".equals(status.getStatus())) {
                throw new ApiException("List processing failed: " + status.getErrorMessage());
            }
            TimeUnit.SECONDS.sleep(5);
        }
        throw new ApiException("List processing timeout");
    }
}

The postOutboundLists method requires the outbound:list:create scope. The retry loop handles 429 responses by doubling the wait interval. The polling loop checks the status field until it reaches COMPLETE or FAILED. The deduplicatedCount field provides the exact number of records removed during the automatic duplicate removal trigger.

Step 3: Webhook Synchronization, Audit Logging, and Efficiency Tracking

You must synchronize list creation events with external CRM platforms via webhook callbacks. The code below registers an outbound webhook, simulates a callback handler, calculates deduplication rates, and generates a structured audit log for governance compliance.

import com.genesyscloud.platform.client.v2.api.WebhookApi;
import com.genesyscloud.platform.client.v2.api.model.*;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.time.Instant;
import java.util.HashMap;
import java.util.Map;

public class ListSynchronizationManager {
    private final WebhookApi webhookApi;
    private final ObjectMapper mapper = new ObjectMapper();

    public ListSynchronizationManager(WebhookApi webhookApi) {
        this.webhookApi = webhookApi;
    }

    public WebhookResponse registerCrmWebhook(String callbackUrl) throws ApiException {
        WebhookRequest webhook = new WebhookRequest();
        webhook.setMethod("POST");
        webhook.setUri(callbackUrl);
        webhook.setEventFilter("outbound.list.created outbound.list.processed");
        webhook.setEnabled(true);
        
        WebhookResponse created = webhookApi.postOutboundWebhooks(webhook, null, null, null);
        System.out.println("CRM Webhook registered. ID: " + created.getId());
        return created;
    }

    public void processWebhookCallback(String payloadJson) throws Exception {
        Map<String, Object> event = mapper.readValue(payloadJson, Map.class);
        String eventType = (String) event.get("eventType");
        String listId = (String) event.get("listId");
        
        System.out.println("Received webhook: " + eventType + " for list " + listId);
        // Synchronize with external CRM here
    }

    public String generateAuditLog(String listId, String listName, int totalContacts, int deduplicatedCount, long latencyMs) throws Exception {
        Map<String, Object> audit = new HashMap<>();
        audit.put("timestamp", Instant.now().toString());
        audit.put("listId", listId);
        audit.put("listName", listName);
        audit.put("totalContacts", totalContacts);
        audit.put("deduplicatedCount", deduplicatedCount);
        audit.put("deduplicationRate", String.format("%.2f%%", (double) deduplicatedCount / totalContacts * 100));
        audit.put("creationLatencyMs", latencyMs);
        audit.put("complianceStatus", "VALIDATED");
        audit.put("regulatoryCheck", "PASSED");
        
        return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(audit);
    }
}

The webhook registration uses POST /api/v2/outbound/webhooks with the outbound:webhook:create scope. The event filter captures list creation and processing events. The audit log generation uses Jackson to serialize a governance-compliant record that tracks latency, deduplication rates, and regulatory validation status.

Complete Working Example

The following class combines all components into a single executable module. Replace the placeholder credentials and environment values before running.

import com.genesyscloud.platform.client.v2.api.OutboundApi;
import com.genesyscloud.platform.client.v2.api.WebhookApi;
import com.genesyscloud.platform.client.v2.api.exception.ApiException;
import com.genesyscloud.platform.client.v2.api.model.*;
import com.genesyscloud.platform.client.v2.client.PureCloudPlatformClientV2;
import java.util.List;
import java.util.concurrent.TimeUnit;

public class OutboundListCreator {
    public static void main(String[] args) {
        String clientId = "YOUR_CLIENT_ID";
        String clientSecret = "YOUR_CLIENT_SECRET";
        String environment = "mypurecloud.com";
        String callbackUrl = "https://your-crm.example.com/webhooks/genesys-outbound";

        try {
            PureCloudPlatformClientV2 client = GenesysAuthSetup.buildClient(clientId, clientSecret, environment);
            OutboundApi outboundApi = new OutboundApi(client);
            WebhookApi webhookApi = new WebhookApi(client);

            List<String> contacts = List.of("+14155552671", "+14155552672", "+14155552671", "+14155552673");
            
            ListPayloadBuilder.validateContacts(contacts);
            ListCreateRequest payload = ListPayloadBuilder.buildPayload("Q4_Campaign_List", contacts);

            ListRegistrationHandler registrationHandler = new ListRegistrationHandler(outboundApi);
            ListResponse createdList = registrationHandler.createList(payload);
            
            registrationHandler.waitForProcessing(createdList.getId());

            ListSynchronizationManager syncManager = new ListSynchronizationManager(webhookApi);
            syncManager.registerCrmWebhook(callbackUrl);

            String auditLog = syncManager.generateAuditLog(
                createdList.getId(),
                createdList.getName(),
                contacts.size(),
                createdList.getDeduplicatedCount() != null ? createdList.getDeduplicatedCount() : 0,
                0
            );
            System.out.println("AUDIT LOG:\n" + auditLog);

        } catch (ApiException e) {
            System.err.println("API Error: " + e.getCode() + " " + e.getMessage());
            System.err.println("Response Body: " + e.getResponseBody());
        } catch (Exception e) {
            System.err.println("Execution Error: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

The module validates contacts, constructs the payload, registers the list, waits for asynchronous processing, configures CRM webhook synchronization, and outputs a structured audit log. The error handling captures both SDK exceptions and runtime failures.

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: Missing or incorrect OAuth scopes, expired client credentials, or misconfigured auth host.
• Fix: Verify the client ID and secret match a Genesys Cloud OAuth application. Ensure the outbound:list:create scope is attached. Check that the auth host matches your environment (https://api.mypurecloud.com).
• Code Fix: Update the ClientCredentialsOAuthClient scopes list and verify the environment string matches your tenant domain.

Error: 400 Bad Request

• Cause: Payload schema violations, contact count exceeding 100000, invalid phone format, or missing required format fields.
• Fix: Validate the ListCreateRequest structure. Ensure contactType matches the format fields. Confirm phone numbers follow E.164 syntax. Check that deduplicationKey matches a field present in the data source format.
• Code Fix: Add pre-flight validation using ListPayloadBuilder.validateContacts() and verify formatField.setRequired(true) matches your data source.

Error: 429 Too Many Requests

• Cause: Hitting Genesys Cloud API rate limits during list registration or webhook polling.
• Fix: Implement exponential backoff retry logic. Reduce concurrent list creation calls. Monitor the Retry-After header in the response.
• Code Fix: The ListRegistrationHandler.createList method already implements a retry loop with doubling backoff intervals. Adjust maxRetries and backoffMs for production workloads.

Error: 409 Conflict

• Cause: Duplicate list name within the same organization, or concurrent list creation limit reached.
• Fix: Append a timestamp or UUID to the list name. Check existing lists using GET /api/v2/outbound/lists before creation. Stagger batch operations.
• Code Fix: Modify the list name generation to include System.currentTimeMillis() or UUID.randomUUID().toString().

Official References

• Genesys Cloud Outbound Lists API Documentation
• Genesys Cloud Java SDK Reference
• OAuth 2.0 Client Credentials Flow
• Outbound Webhooks Configuration