Resolving INVALID_VALUE Errors When Creating Genesys Cloud Outbound Contact Lists via API

What You Will Build

• A Python script that successfully creates a new Outbound contact list in Genesys Cloud CX by correctly formatting the JSON payload and handling required fields.
• This tutorial uses the Genesys Cloud Platform API v2 (/api/v2/outbound/contactlists) and the genesys-cloud-sdk-python library.
• The programming language covered is Python 3.8+.

Prerequisites

• OAuth Client Type: Confidential Client (Client Credentials Grant) or Public Client (PKCE/OIDC).
• Required Scopes: outbound:contactlist:create and outbound:contactlist:read.
• SDK Version: genesys-cloud-sdk-python >= 130.0.0.
• Runtime: Python 3.8 or higher.
• External Dependencies:
  • genesys-cloud-sdk-python
  • python-dotenv (for secure credential management)

Authentication Setup

Genesys Cloud APIs require a valid OAuth 2.0 access token. The genesys-cloud-sdk-python library handles the token lifecycle automatically if you provide the client credentials during initialization. You must ensure your client has the outbound:contactlist:create scope assigned in the Genesys Cloud Admin Console under Security > OAuth clients.

Install the SDK:

pip install genesys-cloud-sdk-python python-dotenv

Create a .env file in your project root:

GENESYS_CLIENT_ID=your_client_id
GENESYS_CLIENT_SECRET=your_client_secret
GENESYS_REGION=us-east-1 # e.g., us-east-1, eu-west-1, ap-southeast-2

Initialize the platform client in your code:

import os
from dotenv import load_dotenv
from platformclientv2 import PlatformClient

load_dotenv()

def get_platform_client():
    """Initializes and returns the Genesys Cloud Platform Client."""
    client = PlatformClient()
    client.set_environment(os.getenv("GENESYS_REGION"))
    client.set_credentials(
        os.getenv("GENESYS_CLIENT_ID"),
        os.getenv("GENESYS_CLIENT_SECRET")
    )
    return client

platform_client = get_platform_client()

Implementation

Step 1: Understanding the Contact List Structure

The INVALID_VALUE error during a POST to /api/v2/outbound/contactlist almost always stems from one of three issues:

1. Missing Required Fields: The name field is mandatory. The description is optional but recommended.
2. Incorrect Data Types: The API expects specific types for fields like consentStatus or optInStatus.
3. Invalid Enum Values: Fields like type or consentStatus accept only specific string values.

The core object you are creating is a ContactList. In the Python SDK, this corresponds to the ContactList model.

Let us examine the minimal valid payload.

Required Fields:

• name (string): The name of the contact list. Must be unique within the organization.
• description (string, optional): A brief description.
• consentStatus (string, optional): Defaults to UNKNOWN. Valid values are KNOWN_CONSENTED, KNOWN_OPTED_OUT, UNKNOWN.
• optInStatus (string, optional): Defaults to UNKNOWN. Valid values are KNOWN_OPTED_IN, KNOWN_OPTED_OUT, UNKNOWN.

Common Mistake: Developers often attempt to include contacts or importSpec in the creation payload. This is incorrect. Contact lists are created empty. Contacts are added via separate import jobs or direct contact APIs. Including unsupported fields in the POST body can trigger INVALID_VALUE or 400 Bad Request.

Step 2: Constructing the Payload with the SDK

Using the SDK abstracts away the JSON serialization, reducing the risk of syntax errors. However, you must instantiate the model correctly.

from platformclientv2.models import ContactList

def create_contact_list_payload(name: str, description: str = "") -> ContactList:
    """
    Constructs a ContactList object for creation.
    
    Args:
        name: The unique name for the contact list.
        description: Optional description for the contact list.
        
    Returns:
        ContactList: The instantiated model ready for API submission.
    """
    contact_list = ContactList()
    
    # Set required fields
    contact_list.name = name
    
    # Set optional fields if provided
    if description:
        contact_list.description = description
        
    # Explicitly set consent status if needed, otherwise defaults to UNKNOWN
    # contact_list.consent_status = "UNKNOWN"
    
    return contact_list

Step 3: Executing the API Call with Error Handling

The OutboundApi class handles the HTTP request. We must wrap the call in a try-except block to catch specific API errors. The ApiException provides the status code and response body, which is critical for debugging INVALID_VALUE errors.

from platformclientv2.api import OutboundApi
from platformclientv2.exceptions import ApiException

def create_outbound_contact_list(client: PlatformClient, name: str, description: str = ""):
    """
    Creates a new outbound contact list in Genesys Cloud.
    
    Args:
        client: The initialized PlatformClient.
        name: The name of the contact list.
        description: The description of the contact list.
        
    Returns:
        ContactList: The created contact list object from the API response.
        
    Raises:
        ApiException: If the API call fails.
    """
    outbound_api = OutboundApi(client)
    
    try:
        # Create the payload
        body = create_contact_list_payload(name, description)
        
        # Execute the POST request
        # Path: POST /api/v2/outbound/contactlists
        response = outbound_api.post_outbound_contactlists(body=body)
        
        print(f"Successfully created contact list: {response.id}")
        return response
        
    except ApiException as e:
        print(f"Exception when calling OutboundApi->post_outbound_contactlists: {e}")
        print(f"Status Code: {e.status}")
        print(f"Response Body: {e.body}")
        raise

Complete Working Example

This script combines authentication, payload construction, and execution into a single runnable module. It includes retry logic for transient 429 Too Many Requests errors, which are common in high-throughput environments.

import os
import time
import sys
from dotenv import load_dotenv
from platformclientv2 import PlatformClient
from platformclientv2.api import OutboundApi
from platformclientv2.models import ContactList
from platformclientv2.exceptions import ApiException

load_dotenv()

MAX_RETRIES = 3
RETRY_DELAY = 2  # seconds

def get_platform_client():
    """Initializes and returns the Genesys Cloud Platform Client."""
    client = PlatformClient()
    
    # Set region based on environment variable, default to us-east-1
    region = os.getenv("GENESYS_REGION", "us-east-1")
    client.set_environment(region)
    
    # Set credentials
    client_id = os.getenv("GENESYS_CLIENT_ID")
    client_secret = os.getenv("GENESYS_CLIENT_SECRET")
    
    if not client_id or not client_secret:
        raise ValueError("GENESYS_CLIENT_ID and GENESYS_CLIENT_SECRET must be set in .env")
        
    client.set_credentials(client_id, client_secret)
    return client

def create_contact_list_payload(name: str, description: str = "") -> ContactList:
    """
    Constructs a ContactList object for creation.
    """
    contact_list = ContactList()
    contact_list.name = name
    if description:
        contact_list.description = description
    return contact_list

def create_outbound_contact_list(client: PlatformClient, name: str, description: str = ""):
    """
    Creates a new outbound contact list with retry logic for 429 errors.
    """
    outbound_api = OutboundApi(client)
    
    for attempt in range(1, MAX_RETRIES + 1):
        try:
            body = create_contact_list_payload(name, description)
            
            # POST /api/v2/outbound/contactlists
            response = outbound_api.post_outbound_contactlists(body=body)
            
            print(f"Success: Contact list '{name}' created with ID: {response.id}")
            return response
            
        except ApiException as e:
            if e.status == 429:
                print(f"Rate limited (429). Retrying in {RETRY_DELAY} seconds... (Attempt {attempt}/{MAX_RETRIES})")
                time.sleep(RETRY_DELAY)
                continue
            elif e.status == 400:
                print(f"Bad Request (400). Check payload structure. Error: {e.body}")
                raise
            elif e.status == 409:
                print(f"Conflict (409). Contact list with name '{name}' already exists.")
                raise
            else:
                print(f"Unexpected error (Status: {e.status}): {e.body}")
                raise

if __name__ == "__main__":
    # Configuration
    LIST_NAME = "Marketing_Campaign_Q3_2023"
    LIST_DESC = "Prospects for Q3 marketing push"
    
    try:
        platform_client = get_platform_client()
        result = create_outbound_contact_list(platform_client, LIST_NAME, LIST_DESC)
        
        # Verify the creation by fetching the list
        print("\nVerifying creation...")
        verify_response = platform_client.outbound_api.get_outbound_contactlist(result.id)
        print(f"Verified: Name={verify_response.name}, ID={verify_response.id}")
        
    except Exception as e:
        print(f"Failed to create contact list: {e}")
        sys.exit(1)

Common Errors & Debugging

Error: INVALID_VALUE (HTTP 400)

Cause: The API rejected the request body due to invalid data.

How to Fix:

1. Check name Uniqueness: Ensure the name field is unique across your organization. If a list with that name already exists, the API may return a 409 Conflict, but sometimes validation rules vary.
2. Validate Enum Values: If you are setting consentStatus or optInStatus, ensure the value is exactly one of the allowed strings: KNOWN_CONSENTED, KNOWN_OPTED_OUT, UNKNOWN, KNOWN_OPTED_IN. Case sensitivity matters.
3. Remove Unsupported Fields: Do not include contacts, importSpec, segment, or id in the creation payload. The API generates the id. Contacts are added later.

Debugging Code:

# If you are manually constructing JSON instead of using the SDK model:
import json

payload = {
    "name": "Test List",
    "description": "A test list",
    "consentStatus": "UNKNOWN" # Ensure this is a string, not an integer or null if required
}

# Validate JSON structure before sending
try:
    json.dumps(payload)
    print("Payload is valid JSON")
except TypeError as e:
    print(f"Invalid JSON structure: {e}")

Error: 401 Unauthorized

Cause: The OAuth token is expired, invalid, or lacks the required scope.

How to Fix:

1. Check Scopes: Ensure your OAuth client has outbound:contactlist:create.
2. Token Refresh: The SDK handles refresh automatically. If you are managing tokens manually, ensure you are using a fresh access token.

Error: 403 Forbidden

Cause: The OAuth client does not have permission to create contact lists.

How to Fix:

1. Admin Console: Go to Security > OAuth clients, select your client, and verify the scope outbound:contactlist:create is checked.
2. User Permissions: If using a user-based grant, ensure the user has the “Outbound Contact Lists: Create” permission in their role.

Error: 409 Conflict

Cause: A contact list with the same name already exists.

How to Fix:

1. Check Existing Lists: Query existing lists to verify the name.
2. Update Instead: If you intend to update an existing list, use PUT /api/v2/outbound/contactlists/{contactListId} instead of POST.

Official References

• Genesys Cloud Outbound Contact Lists API Documentation
• Genesys Cloud Python SDK Reference
• OAuth 2.0 Scopes Reference