K2 Five Workflow REST API: Does GET /tasks support filtering by workflowName?

Hi everyone,

I'm testing the K2 Five version 5.6 and 5.9.1 Workflow REST API and have a question about filtering tasks.

GET /Api/Workflow/V1/tasks

I receive data like:

{
  "serialNumber": "132_7",
  "workflowName": "Ya\\assignTaskWF",
  "workflowDisplayName": "assignTaskWF",
  "workflowCategory": "Ya"
}

I tried filtering by workflow name:

GET /Api/Workflow/V1/tasks?$filter=workflowName eq 'Ya\\assignTaskWF'

However, the response still returns tasks from other workflows as well.

From the Swagger documentation for GET /tasks, I only see the following query parameter:

state

and I do not see $filter documented.

My questions are:

1. Does GET /Api/Workflow/V1/tasks support OData-style $filter parameters?
2. Is workflowName a valid filter field?
3. Is there a supported way to retrieve tasks for a specific workflow only?
4. If filtering is not supported, is the recommended approach to retrieve all tasks and filter on the client side?
5. Is there another endpoint available that supports filtering by workflow name or workflow instance?

GET /Api/Workflow/V1/tasks?$filter=workflowName eq 'Ya\\assignTaskWF'

Expected:

[
  {
    "workflowName": "Ya\\assignTaskWF"
  }
]

Actual:

[

  {

    "workflowName": "Ya\\assignTaskWF"

  },

  {

    "workflowName": "example\\assignTaskexampleWF"

  }

]

Any guidance would be appreciated.

Thanks!