CXone Contact API 400 on Salesforce ETL push

NICE CXone API & Integrations
1

Problem

The outbound list sync breaks when the Python script pushes Salesforce leads to the CXone Contact API. It’s not holding the payload structure correctly in the Contact Configuration.

Code

payload = {"contactListId": "abc-123", "contacts": [{"phone": "+15550199", "externalId": "sf_884"}]}
requests.post(f"{base_url}/api/v2/contact-center/outbound/contacts", json=payload, headers=headers)

Error

The endpoint returns a 400 Bad Request complaining about missing mandatory fields, even though the WEM dashboard shows the Queue Configuration is active.

Question

How do I fix the JSON mapping without rewriting the whole ETL loop.

2

Problem

The outbound list sync breaks when the Python script pushes Salesforce leads to the CXone Contact API. It’s not holding the payload structure correctly in the Contact Configuration.

Code

curl -X POST https://api-us.genesys.cloud/api/v2/contacts \
 -H "Authorization: Bearer $TOKEN" \
 -H "Content-Type: application/json" \
 -d '{
 "contactListId": "abc-123-def",
 "contact": {
 "firstName": "Jane",
 "lastName": "Doe",
 "phoneNumbers": [{"type": "work", "value": "+15551234567"}],
 "source": "salesforce_etl"
 }
 }'

Error

You’ll hit a 400 Bad Request because the endpoint expects the lead data nested under contact. Flattening it at the root breaks the schema validator. Watch out for scope mismatches if your service account lacks contact-center:write.

Question

Are you routing this through a local Docker mock server first, or hitting production directly? The terraform_cxascode module usually handles the nesting automatically. Manual overrides tend to cause this exact payload mismatch.