WFM API 429 errors during JMeter load test for bulk schedule uploads

How should I properly to handle rate limiting for bulk schedule uploads in Genesys Cloud WFM? The test fails with 429 Too Many Requests when concurrent thread count exceeds 50.

Environment details:

  • Genesys Cloud US1
  • JMeter 5.6
  • Endpoint: /api/v2/wfm/schedules
  • Config: 100 concurrent threads, 500ms ramp-up

The goal is to simulate 500 agents having their schedules updated simultaneously. The error response includes:

{
 "code": 429,
 "message": "Rate limit exceeded. Please retry after 5 seconds."
}

JMeter config:

thread_group:
 number_of_threads: 100
 ramp_up: 500
 loop_count: 1

http_request_defaults:
 endpoint: /api/v2/wfm/schedules
 method: POST
 content_type: application/json

json_extractor:
 variable_name: schedule_id
 json_path: $.id

The documented rate limit for WFM APIs is 100 requests per minute per tenant. The test exceeds this limit quickly. Adding delays between requests slows the test significantly. Is there a recommended pattern for bulk schedule updates under high concurrency? The current approach causes test failures and incomplete data uploads.