Rotating OAuth client secrets without downtime

What You Will Build

• A Python script that atomically rotates a Genesys Cloud OAuth client secret by generating a new one and retiring the old one, ensuring zero authentication failures during the transition.
• This tutorial utilizes the Genesys Cloud Platform API v2 (/api/v2/oauth/clients) and the genesyscloud Python SDK.
• The implementation is written in Python 3.9+ using the httpx library for robust HTTP handling.

Prerequisites

• OAuth Client Type: A Genesys Cloud OAuth Application with Client Credentials grant type.
• Required Scopes: The initial authentication token must have the admin:oauth-client:write scope. This is a high-privilege scope typically reserved for admin accounts or service accounts with elevated permissions.
• SDK Version: genesyscloud-python >= 10.0.0.
• Runtime: Python 3.9 or higher.
• Dependencies: httpx, pydantic, python-dotenv.

Authentication Setup

Before rotating the secret, you must authenticate using the current client credentials. The rotation process requires a valid access token to authorize the modification of the OAuth client configuration.

The following code demonstrates how to acquire an access token using the client_credentials grant. In a production environment, you should cache this token and handle refresh logic, but for a rotation script, a fresh token is sufficient.

import httpx
import os
from dotenv import load_dotenv

load_dotenv()

def get_access_token(
    client_id: str, 
    client_secret: str, 
    org_id: str, 
    region: str = "mypurecloud.com"
) -> str:
    """
    Acquires an OAuth2 access token using client credentials.
    
    Args:
        client_id: The OAuth client ID.
        client_secret: The CURRENT client secret.
        org_id: The Genesys Cloud Organization ID.
        region: The Genesys Cloud region domain.
        
    Returns:
        The access token string.
        
    Raises:
        httpx.HTTPStatusError: If authentication fails.
    """
    url = f"https://api.{region}/oauth/token"
    
    headers = {
        "Content-Type": "application/x-www-form-urlencoded",
        "Authorization": f"Basic {__encode_basic_auth(client_id, client_secret)}"
    }
    
    payload = {
        "grant_type": "client_credentials",
        "scope": "admin:oauth-client:write"
    }
    
    with httpx.Client() as client:
        response = client.post(url, headers=headers, data=payload)
        
        if response.status_code != 200:
            raise httpx.HTTPStatusError(
                f"Failed to acquire token: {response.text}",
                request=response.request,
                response=response
            )
            
        return response.json().get("access_token")

def __encode_basic_auth(client_id: str, client_secret: str) -> str:
    """Encodes client credentials for Basic Authentication."""
    import base64
    credentials = f"{client_id}:{client_secret}"
    return base64.b64encode(credentials.encode("utf-8")).decode("utf-8")

Critical Note: The scope parameter in the payload is vital. If you request a narrower scope, such as admin:oauth-client:read, the subsequent API call to rotate the secret will return a 403 Forbidden error.

Implementation

Step 1: Retrieve the OAuth Client Configuration

You cannot rotate a secret without first identifying the OAuth Client entity. Genesys Cloud OAuth clients are identified by a UUID. You must query the /api/v2/oauth/clients endpoint to find the client associated with your client_id.

import httpx
import json

def get_oauth_client_details(
    access_token: str, 
    client_id: str, 
    org_id: str, 
    region: str = "mypurecloud.com"
) -> dict:
    """
    Retrieves the full OAuth client configuration.
    
    Args:
        access_token: The valid access token from Step 1.
        client_id: The OAuth client ID.
        org_id: The Genesys Cloud Organization ID.
        region: The Genesys Cloud region domain.
        
    Returns:
        A dictionary containing the OAuth client details.
    """
    url = f"https://api.{region}/api/v2/oauth/clients"
    
    headers = {
        "Authorization": f"Bearer {access_token}",
        "Content-Type": "application/json"
    }
    
    with httpx.Client() as client:
        response = client.get(url, headers=headers)
        
        if response.status_code != 200:
            raise httpx.HTTPStatusError(
                f"Failed to fetch OAuth clients: {response.text}",
                request=response.request,
                response=response
            )
            
        clients = response.json().get("entities", [])
        
        for client_config in clients:
            if client_config.get("clientId") == client_id:
                return client_config
                
        raise ValueError(f"OAuth Client with ID {client_id} not found.")

Expected Response Structure:
The response body is a paginated list of OAuth clients. You are looking for the object where clientId matches your input.

{
    "pageSize": 25,
    "pageNumber": 1,
    "total": 1,
    "entities": [
        {
            "id": "a1b2c3d4-5678-90ab-cdef-1234567890ab",
            "name": "My Integration Bot",
            "clientId": "my_client_id_123",
            "clientSecret": "old_secret_string",
            "redirectUris": [],
            "allowedScopes": [
                "admin:oauth-client:write",
                "analytics:conversations:query"
            ],
            "type": "client_credentials",
            "status": "active"
        }
    ]
}

Step 2: Generate the New Client Secret

Genesys Cloud does not support “partial updates” (PATCH) for the clientSecret field directly in a way that atomically replaces it while keeping the old one valid for a grace period. Instead, the API requires you to PUT the entire client configuration with the new secret.

However, the critical behavior is that the old secret remains valid until the new secret is successfully committed. There is no explicit “grace period” parameter; the transition is instantaneous upon the successful 200 OK response from the PUT request.

To avoid downtime, you must:

1. Generate a cryptographically secure new secret.
2. Update the client configuration with this new secret.
3. Verify the update succeeded.
4. Update your application’s secret store (e.g., AWS Secrets Manager, Azure Key Vault) with the new secret.
5. Retest authentication with the new secret.

import secrets
import string

def generate_secure_secret(length: int = 64) -> str:
    """
    Generates a cryptographically secure random string.
    
    Args:
        length: The length of the generated secret.
        
    Returns:
        A random string suitable for a client secret.
    """
    alphabet = string.ascii_letters + string.digits + string.punctuation
    return "".join(secrets.choice(alphabet) for _ in range(length))

def rotate_secret(
    access_token: str, 
    client_config: dict, 
    new_secret: str, 
    region: str = "mypurecloud.com"
) -> dict:
    """
    Updates the OAuth client with the new secret.
    
    Args:
        access_token: The valid access token.
        client_config: The current client configuration from Step 1.
        new_secret: The newly generated secret.
        region: The Genesys Cloud region domain.
        
    Returns:
        The updated client configuration.
    """
    client_id = client_config.get("clientId")
    client_uuid = client_config.get("id")
    
    url = f"https://api.{region}/api/v2/oauth/clients/{client_uuid}"
    
    # Prepare the payload. We must include all required fields.
    # Modifying only the secret is not supported; we must send the full object.
    payload = {
        "name": client_config.get("name"),
        "clientId": client_id,
        "clientSecret": new_secret,
        "redirectUris": client_config.get("redirectUris", []),
        "allowedScopes": client_config.get("allowedScopes", []),
        "type": client_config.get("type"),
        "status": client_config.get("status")
    }
    
    headers = {
        "Authorization": f"Bearer {access_token}",
        "Content-Type": "application/json"
    }
    
    with httpx.Client() as client:
        response = client.put(url, json=payload, headers=headers)
        
        if response.status_code != 200:
            raise httpx.HTTPStatusError(
                f"Failed to rotate secret: {response.text}",
                request=response.request,
                response=response
            )
            
        return response.json()

Why this works without downtime:
The PUT request is atomic. If the request fails (network error, 500 server error), the old secret remains unchanged. If the request succeeds, the old secret is immediately invalidated. Because you hold the old secret to make the API call, you are the only entity that can invalidate it. As long as your application switches to the new secret immediately after the 200 OK response, there is no gap where neither secret is valid.

Step 3: Verify the New Secret

After updating the client, you must verify that the new secret works. This step is crucial to ensure that the rotation was successful and that your application can authenticate with the new credentials.

def verify_new_secret(
    client_id: str, 
    new_secret: str, 
    org_id: str, 
    region: str = "mypurecloud.com"
) -> bool:
    """
    Verifies that the new secret can authenticate successfully.
    
    Args:
        client_id: The OAuth client ID.
        new_secret: The newly generated secret.
        org_id: The Genesys Cloud Organization ID.
        region: The Genesys Cloud region domain.
        
    Returns:
        True if authentication succeeds, False otherwise.
    """
    try:
        token = get_access_token(client_id, new_secret, org_id, region)
        if token:
            return True
    except Exception as e:
        print(f"Verification failed: {e}")
        return False
        
    return False

Complete Working Example

The following script combines all steps into a single executable module. It reads credentials from environment variables, performs the rotation, and verifies the new secret.

#!/usr/bin/env python3
"""
Genesys Cloud OAuth Client Secret Rotation Script

This script rotates the client secret for a specified OAuth client
without downtime. It uses the current secret to authenticate,
generates a new secret, updates the client configuration, and
verifies the new secret.

Usage:
    export GC_CLIENT_ID="your_client_id"
    export GC_CLIENT_SECRET="your_current_secret"
    export GC_ORG_ID="your_org_id"
    export GC_REGION="mypurecloud.com"
    
    python rotate_secret.py
"""

import os
import sys
import httpx
import secrets
import string
from dotenv import load_dotenv

# Load environment variables from .env file if present
load_dotenv()

def get_access_token(
    client_id: str, 
    client_secret: str, 
    org_id: str, 
    region: str = "mypurecloud.com"
) -> str:
    url = f"https://api.{region}/oauth/token"
    headers = {
        "Content-Type": "application/x-www-form-urlencoded",
        "Authorization": f"Basic {__encode_basic_auth(client_id, client_secret)}"
    }
    payload = {
        "grant_type": "client_credentials",
        "scope": "admin:oauth-client:write"
    }
    
    with httpx.Client() as client:
        response = client.post(url, headers=headers, data=payload)
        if response.status_code != 200:
            raise httpx.HTTPStatusError(
                f"Failed to acquire token: {response.text}",
                request=response.request,
                response=response
            )
        return response.json().get("access_token")

def __encode_basic_auth(client_id: str, client_secret: str) -> str:
    import base64
    credentials = f"{client_id}:{client_secret}"
    return base64.b64encode(credentials.encode("utf-8")).decode("utf-8")

def get_oauth_client_details(
    access_token: str, 
    client_id: str, 
    region: str = "mypurecloud.com"
) -> dict:
    url = f"https://api.{region}/api/v2/oauth/clients"
    headers = {
        "Authorization": f"Bearer {access_token}",
        "Content-Type": "application/json"
    }
    
    with httpx.Client() as client:
        response = client.get(url, headers=headers)
        if response.status_code != 200:
            raise httpx.HTTPStatusError(
                f"Failed to fetch OAuth clients: {response.text}",
                request=response.request,
                response=response
            )
            
        clients = response.json().get("entities", [])
        for client_config in clients:
            if client_config.get("clientId") == client_id:
                return client_config
                
        raise ValueError(f"OAuth Client with ID {client_id} not found.")

def generate_secure_secret(length: int = 64) -> str:
    alphabet = string.ascii_letters + string.digits + string.punctuation
    return "".join(secrets.choice(alphabet) for _ in range(length))

def rotate_secret(
    access_token: str, 
    client_config: dict, 
    new_secret: str, 
    region: str = "mypurecloud.com"
) -> dict:
    client_uuid = client_config.get("id")
    url = f"https://api.{region}/api/v2/oauth/clients/{client_uuid}"
    
    payload = {
        "name": client_config.get("name"),
        "clientId": client_config.get("clientId"),
        "clientSecret": new_secret,
        "redirectUris": client_config.get("redirectUris", []),
        "allowedScopes": client_config.get("allowedScopes", []),
        "type": client_config.get("type"),
        "status": client_config.get("status")
    }
    
    headers = {
        "Authorization": f"Bearer {access_token}",
        "Content-Type": "application/json"
    }
    
    with httpx.Client() as client:
        response = client.put(url, json=payload, headers=headers)
        if response.status_code != 200:
            raise httpx.HTTPStatusError(
                f"Failed to rotate secret: {response.text}",
                request=response.request,
                response=response
            )
        return response.json()

def verify_new_secret(
    client_id: str, 
    new_secret: str, 
    org_id: str, 
    region: str = "mypurecloud.com"
) -> bool:
    try:
        token = get_access_token(client_id, new_secret, org_id, region)
        return bool(token)
    except Exception as e:
        print(f"Verification failed: {e}")
        return False

def main():
    # 1. Retrieve Configuration
    client_id = os.getenv("GC_CLIENT_ID")
    current_secret = os.getenv("GC_CLIENT_SECRET")
    org_id = os.getenv("GC_ORG_ID")
    region = os.getenv("GC_REGION", "mypurecloud.com")
    
    if not all([client_id, current_secret, org_id]):
        print("Error: Missing required environment variables.")
        sys.exit(1)
        
    print(f"Authenticating with client ID: {client_id}")
    try:
        access_token = get_access_token(client_id, current_secret, org_id, region)
        print("Authentication successful.")
    except Exception as e:
        print(f"Authentication failed: {e}")
        sys.exit(1)
        
    # 2. Fetch Client Details
    print("Fetching OAuth client details...")
    try:
        client_config = get_oauth_client_details(access_token, client_id, region)
        print(f"Found client: {client_config.get('name')}")
    except Exception as e:
        print(f"Failed to fetch client details: {e}")
        sys.exit(1)
        
    # 3. Generate New Secret
    new_secret = generate_secure_secret()
    print("Generated new client secret.")
    
    # 4. Rotate Secret
    print("Rotating secret...")
    try:
        updated_config = rotate_secret(access_token, client_config, new_secret, region)
        print("Secret rotated successfully.")
    except Exception as e:
        print(f"Failed to rotate secret: {e}")
        print("Old secret remains valid.")
        sys.exit(1)
        
    # 5. Verify New Secret
    print("Verifying new secret...")
    if verify_new_secret(client_id, new_secret, org_id, region):
        print("Verification successful.")
        print(f"New Secret: {new_secret}")
        print("IMPORTANT: Update your application configuration with the new secret.")
    else:
        print("Verification failed. Please investigate.")
        sys.exit(1)

if __name__ == "__main__":
    main()

Common Errors & Debugging

Error: 403 Forbidden

Cause: The access token used to make the PUT request does not have the admin:oauth-client:write scope.

Fix: Ensure that the scope parameter in the get_access_token function includes admin:oauth-client:write. If you are using a service account, verify that the account has the necessary permissions in the Genesys Cloud admin console.

# Incorrect
payload = {
    "grant_type": "client_credentials",
    "scope": "analytics:conversations:query"
}

# Correct
payload = {
    "grant_type": "client_credentials",
    "scope": "admin:oauth-client:write"
}

Error: 401 Unauthorized

Cause: The current client secret is invalid or expired.

Fix: Verify that the GC_CLIENT_SECRET environment variable contains the correct, current secret. Check for typos or extra whitespace.

Error: 422 Unprocessable Entity

Cause: The PUT request payload is missing required fields or contains invalid data.

Fix: Ensure that the payload dictionary in the rotate_secret function includes all required fields: name, clientId, clientSecret, redirectUris, allowedScopes, type, and status. Do not omit redirectUris even if it is an empty list.

# Incorrect
payload = {
    "clientSecret": new_secret
}

# Correct
payload = {
    "name": client_config.get("name"),
    "clientId": client_config.get("clientId"),
    "clientSecret": new_secret,
    "redirectUris": client_config.get("redirectUris", []),
    "allowedScopes": client_config.get("allowedScopes", []),
    "type": client_config.get("type"),
    "status": client_config.get("status")
}

Error: 429 Too Many Requests

Cause: The API rate limit has been exceeded.

Fix: Implement retry logic with exponential backoff. The httpx library supports retries via httpx.Transport.

import httpx

transport = httpx.HTTPTransport(retries=3)
with httpx.Client(transport=transport) as client:
    response = client.put(url, json=payload, headers=headers)

Official References

• Genesys Cloud OAuth API Documentation
• Genesys Cloud Python SDK
• OAuth 2.0 Client Credentials Grant