WFM Adherence API returning 400 Bad Request with complex shift patterns across APAC regions

Genesys Cloud WFM
1

Looking for advice on a persistent issue with the WFM adherence reporting API. We are seeing 400 Bad Request responses when querying adherence data for agents with split shifts that span midnight in the Asia/Singapore timezone. The error payload indicates a validation failure on the startTime and endTime parameters, specifically citing “Invalid date range or timezone conflict”. This is happening despite the timestamps being in valid ISO 8601 format with explicit +08:00 offsets.

Here is the sequence of events leading to the error:

  1. The scheduling engine generates a split shift for an agent: 02:00 - 06:00 and 22:00 - 02:00 (next day).
  2. Our integration service constructs the API request to /api/v2/wfm/schedules/v2/agent-adherence using the UTC-normalized timestamps.
  3. The request includes the dateRange filter set to a 24-hour window starting at 2023-10-27T00:00:00+08:00.
  4. The API returns a 400 error immediately, without processing the adherence calculation.
  5. If we adjust the shift to end at 01:59:59 instead of 02:00:00 next day, the request succeeds, but the data is incomplete.

This behavior suggests a boundary condition bug in how the WFM service parses multi-day ranges when the local timezone offset is applied. Given our heavy reliance on accurate adherence metrics for carrier failover logic triggers, this data gap is critical. We have verified that the same request works perfectly for agents with standard 09:00 - 17:00 shifts. The issue is isolated to shifts crossing the day boundary in the ap-southeast-1 region.

Has anyone encountered similar parsing issues with the WFM API when dealing with non-standard shift patterns? We are considering switching to the raw event log API as a workaround, but that introduces significant latency in our reporting pipeline. Any insights into whether this is a known limitation or a configuration error on our end would be appreciated.

2

The WFM adherence endpoint requires that startTime and endTime parameters be passed in UTC ISO 8601 format without explicit timezone offsets when querying across multiple regions. For split shifts spanning midnight in Asia/Singapore, the API interprets local timezone strings as conflicting with the internal UTC conversion logic. Convert the timestamps to UTC before sending the request. Use a snippet like this in your integration code: const utcStart = new Date(localStart.getTime() - localStart.getTimezoneOffset() * 60000).toISOString(); const utcEnd = new Date(localEnd.getTime() - localEnd.getTimezoneOffset() * 60000).toISOString(); Then pass utcStart and utcEnd to the API. This avoids the validation failure caused by timezone conflict errors. The AppFoundry integration should handle this conversion automatically if configured correctly, but manual conversion ensures compatibility with older API versions.

3

You might want to check at how the ServiceNow Data Action handles the payload transformation before hitting the WFM endpoint, as the issue often stems from implicit timezone conversions rather than the raw API call itself. When dealing with split shifts across APAC regions, the standard UTC conversion can still trigger validation errors if the underlying Data Action does not explicitly strip the offset during the REST API handshake. Try implementing a pre-processing step in your webhook payload to ensure the timestamps are strictly epoch-based before passing them to the adherence query.

{
 "startTime": "{{formatDate(trigger.event.start, 'YYYY-MM-DDTHH:mm:ssZ')}}",
 "endTime": "{{formatDate(trigger.event.end, 'YYYY-MM-DDTHH:mm:ssZ')}}",
 "agentId": "{{trigger.event.agent.id}}",
 "forceUtc": true
}

This explicit formatting forces the service to bypass the internal timezone conflict logic.