Python PATCH to CXone suppression list throws 409 version conflict on atomic update

NICE CXone API & Integrations
1

Problem

cxone_sdk doesn’t expose a retry wrapper for suppression PATCH calls, so version conflicts break the atomic update. Python script pushes contact identifiers with reason codes and expiration dates.

  • Python 3.11 requests library
  • CXone /cxonecc/suppression/v1/suppressionLists endpoint
  • Local deduplication and date normalization pipeline
  • Optimistic locking via If-Match header

Code

import requests
headers = {"Authorization": f"Bearer {tok}", "If-Match": ver, "Content-Type": "application/json"}
body = {"contacts": [{"identifier": "a@b.com", "reason": "compliance", "expires": "2024-12-31T00:00:00Z"}]}
requests.patch(f"https://api.nice.incontact.com/cxonecc/suppression/v1/suppressionLists/{lid}", headers=headers, json=body)

Error

HTTP 409 returns {"errorCode": "VERSION_CONFLICT", "message": "Optimistic locking failed."} since parallel CRM webhooks modify the list before the deduplication pipeline finishes.

Question

How do I refresh the If-Match token without fetching the full suppression array?