I can’t seem to figure out why the Workforce Management API is rejecting my scheduling requests despite the timestamps appearing valid in the documentation.
- Region: AP-Southeast-1 (Singapore)
- API Endpoint: POST /api/v2/wfm/schedulings/shifts
- SDK Version: Genesys Cloud Java SDK v2.0.145
- Role: Trunk Administrator (Managing 15 BYOC Trunks)
- Error Code: 400 Bad Request
The objective is to align agent availability with our predicted inbound call volume derived from historical SIP registration success rates and carrier failover latency metrics. I am attempting to create shift templates that correlate directly with the operational health windows of our primary carriers in the Singapore timezone (Asia/Singapore, UTC+8).
When I submit a shift request with a start time of 2023-10-25T08:00:00+08:00 and an end time of 2023-10-25T16:00:00+08:00, the API returns a 400 error with the message: Interval start time must be strictly before end time. This is perplexing because the start time is clearly eight hours prior to the end time. I have verified the ISO 8601 format multiple times, ensuring the timezone offset is explicitly declared as +08:00 rather than relying on the system default.
I suspect there might be an implicit conversion to UTC occurring server-side that is causing a logic error in the validation layer, or perhaps the WFM service in AP-Southeast-1 has a specific quirk regarding daylight saving time adjustments that are not documented. Given that our BYOC trunks experience peak load during the Asian business hours, accurate scheduling is critical for our capacity planning analytics. If the WFM system is incorrectly parsing the timezone offset, it could lead to significant understaffing during critical failover events.
Has anyone encountered similar timestamp validation issues when integrating WFM scheduling with regional trunk performance data? I need to know if this is a known limitation of the AP-Southeast-1 WFM instance or if I am missing a specific parameter in the request body to override the default timezone handling.