Maybe you can use either of the following:

• For all tasks in a project:
  • GET /ws-api/v2/projectGroups/search?fields=projects(tasks(currentTaskStep(name,workflowTransitions)))
• For a specific task:
  • GET /ws-api/v2/tasks/{taskId}?fields=currentTaskStep

Hope this helps.

Maybe you can use either of the following:

• For all tasks in a project:
  • GET /ws-api/v2/projectGroups/search?fields=projects(tasks(currentTaskStep(name,workflowTransitions)))
• For a specific task:
  • GET /ws-api/v2/tasks/{taskId}?fields=currentTaskStep

Hope this helps.