Environment: Genesys Cloud US-East, JMeter 5.6, 200 concurrent users pushing schedule updates via PUT /api/v2/wfm/schedules.
Why does this setting trigger immediate 429 Too Many Requests errors when the load test hits 50% concurrency, even though API rate limit headers indicate we are under the global limit?
This is actually a known issue… The WFM API has stricter per-endpoint throttling than the global header suggests. During high-concurrency schedule publishes, the system prioritizes data integrity over speed. Try implementing exponential backoff in JMeter when catching 429s to respect the sliding window limits.
Warning: Ignoring these limits can lock out legitimate schedule updates for your agents.
The rate limit headers often mask per-resource throttling in WFM. The global limit applies to the org, but /schedules has a stricter bucket. Check the Retry-After header specifically for the 429 response. See KB-9921 for details on endpoint-specific caps.