Getting a 400 Bad Request when pushing schedule blocks to the Digital Messaging channel via the WFM API. The payload validates fine in Postman but fails with ‘InvalidShiftType’ in our automated publish job. Is there a specific constraint for digital-only agents in the US2 region?
While the InvalidShiftType error often points to schema mismatches, the US2 region has specific constraints for digital-only agents that differ from voice trunks. The WFM API expects a shift_type of DIGITAL rather than the standard VOICE or HYBRID. If you are reusing a template from voice agents, the payload will fail validation at the gateway level.
Check your JSON body for the shift_template object. Ensure the type field is explicitly set to "DIGITAL" and that the skills array matches the exact identifiers from the Digital Messaging channel configuration. Also, verify that the start_time and end_time are in ISO 8601 format with UTC offsets, as US2 is strict about timezone parsing for non-voice shifts.
Try this structure:
{
"shift_type": "DIGITAL",
"skill_ids": ["dm_general_us2"],
"start_time": "2023-10-01T09:00:00Z"
}
If the error persists, review the WFM audit logs for the specific attribute causing the rejection.
The InvalidShiftType error is frequently a red herring for deeper payload structure mismatches in the US2 region, particularly when handling digital-only queues. While setting shift_type to DIGITAL is necessary, it is often insufficient if the capacity object within the shift block is not explicitly defined or if the channel_id references a voice skill instead of a digital skill.
In my integration with ServiceNow for automated schedule publishing, I found that the WFM API in US2 is stricter about the capacity field for digital channels. It requires a non-zero integer for capacity and explicitly rejects null or missing values, whereas voice channels might default to 1.0. Additionally, ensure the skill_id in the payload matches a skill mapped to a Digital Messaging channel (e.g., web_chat or social), not a voice skill.
Here is the corrected JSON structure that bypasses the gateway validation:
{
"schedule_block_id": "sb_12345",
"shift_template_id": "st_67890",
"shift_type": "DIGITAL",
"capacity": {
"value": 1,
"type": "ABSOLUTE"
},
"channel_id": "dm_web_chat_01",
"skill_id": "skill_digital_support_uk"
}
If you are using a Data Action to push this to ServiceNow or another external system, verify that the variable mapping preserves the integer type for capacity. ServiceNow REST APIs can sometimes coerce integers to strings, which triggers the 400 error on the Genesys side. Also, check the start_time and end_time ISO 8601 format; US2 has seen issues with timezone offsets not being explicitly included (e.g., +00:00).
Another potential culprit is the agent_id. Ensure the agent is provisioned for the specific digital channel in the Admin console. If the agent lacks the digital skill assignment, the WFM API will reject the schedule block even if the JSON is valid. This is a common oversight when migrating agents from voice to digital-only roles.