We just flipped the switch to enforce SAML SSO for our CXone org. Human users are fine, logging in via IdP as expected. Our backend services are broken though.
We have a dedicated service account that uses the client_credentials grant to fetch tokens for our DFO custom channel integrations. Since the SAML mandate went live, the token endpoint is returning a 401 Unauthorized.
Here’s the request body we’re sending:
{
"grant_type": "client_credentials",
"client_id": "my-service-client-id",
"client_secret": "my-secret"
}
The response is generic:
{
"error": "unauthorized",
"error_description": "Invalid grant type"
}
I’ve checked the SAML config in Admin. The service account isn’t assigned to any SAML entity, but it seems the org-level setting is overriding it. Do I need to whitelist the client_id in the SAML settings? Or is there a specific flag in the API call to bypass SAML for machine-to-machine auth? Docs are silent on this edge case.
The docs explicitly state that client_credentials is exempt from SSO enforcement, so a 401 here usually means the service account itself got tangled up in the user provisioning sync or the permissions were stripped during the migration. Check if the user still has the platform:oauth:write scope and that it hasn’t been marked as disabled in the admin portal.
Here’s a quick Node.js snippet using the PureCloudPlatformClientV2 SDK to verify the token request and catch the specific error payload. It helps to log the raw response body because the SDK sometimes swallows the detailed error message from the auth server.
const platformClient = require('genesyscloud').platformClient;
async function checkServiceAccountToken() {
const auth = platformClient.AuthApi();
// Ensure you are using the correct environment (e.g., us-east-1)
auth.setEnvironment('us-east-1');
try {
const tokenResponse = await auth.postOAuthToken(
'client_credentials',
{
client_id: process.env.GENESYS_CLIENT_ID,
client_secret: process.env.GENESYS_CLIENT_SECRET,
scope: 'platform:oauth:write' // Minimal scope for testing
}
);
console.log('Token acquired successfully:', tokenResponse.result.access_token.substring(0, 20) + '...');
} catch (error) {
// Log the full error response to see if it's a 401 (auth fail) or 403 (scope/permission fail)
console.error('Token request failed:', error.response?.status, error.response?.data);
}
}
checkServiceAccountToken();
If the error response says invalid_client, the secret might have been rotated or the client registration is corrupted. If it says unauthorized_client, the service account is likely blocked or lacks the necessary OAuth client permissions in the org settings. You can also try revoking and regenerating the client secret just to rule out a stale credential issue.
const { PlatformClient } = require(‘genesys-cloud-purecloud-platform-client’);
// Ensure the auth type is explicitly set to client_credentials
// and that you are using the Service Account’s specific Client ID/Secret
const platformClient = PlatformClient.create()
.setAuthMode(‘client_credentials’)
.setAuthData({
clientId: ‘YOUR_SERVICE_ACCOUNT_CLIENT_ID’,
clientSecret: ‘YOUR_SERVICE_ACCOUNT_CLIENT_SECRET’
});
// Test the token fetch directly to isolate the 401
platformClient.authApi.createOAuthToken({
body: {
grant_type: ‘client_credentials’,
scope: ‘platform:oauth:write’
}
}).then(res => {
console.log(‘Token acquired:’, res.body.access_token.substring(0, 20) + ‘…’);
}).catch(err => {
// This will expose if it’s a permission issue or a disabled account
console.error(‘Auth failed:’, err.body.message);
});
The 401 is definitely pointing to a permission or account status issue rather than the SAML enforcement itself, as As noted above. The `client_credentials` flow bypasses SSO by design.
In our setup with New Relic webhooks, we hit this exact wall when the provisioning sync inadvertently disabled the service account during the SAML rollout. The account existed but had `enabled: false` in the backend.
Check the user object via `GET /api/v2/users/{id}`. Look for the `enabled` field. If it's false, flip it back to true. Also verify the `roles` array still contains the necessary permissions for your DFO channel. The SDK snippet above helps isolate whether the credentials are valid or if the account is simply locked out.