WFM API 429s during schedule import load test

I can’t seem to figure out why POST /api/v2/wfm/schedules/{scheduleId}/segments returns 429 Too Many Requests.

Background

Testing WFM throughput with JMeter 5.6.2 from Singapore. Targeting 50 concurrent threads.

Issue

Rate limit hit immediately after 10 requests. Need to validate bulk update capacity.

Troubleshooting

Checked headers. Retry-After is 5s. Reduced concurrency to 10 threads, issue persists. Is there a specific burst limit for WFM endpoints?