We're updating some of our product names. K2 Five is now Nintex Automation. You may see both product names in our help pages while we make this change.

Workflow Runtime APIs and Services

This section describes the available APIs and Services that can be used to interact with workflows at runtime.

Technology	Available interfaces	Typical use and additional notes
Workflow REST API	https://[DOMAIN:PORT]/api/workflow/v1/Workflows	Use the Workflow REST API to remotely manage workflows and tasks using REST.
Workflow REST API	https://[DOMAIN:PORT]/api/workflow/v1/Tasks
.NET Assemblies	K2 provides a rich set of .NET Class Libraries to allow developers to interact with workflows at runtime. K2 client API .DLLs that you reference (such as HostClientApi.dll, SmartObject.Client.dll and the Workflow client API), are thread safe. If you open a connection with the API, you should close and dispose of the connection object.
	Workflow Client API (SourceCode.Workflow.Client.dll)	The workflow Client API enables developers to interact with workflow instances, worklists and workflow items at runtime. Typical uses include starting workflows, retrieving worklist items, completing workflow tasks
	Workflow Management API	The workflow management API allows developers to manage and administer workflows on a K2 environment. Typical uses include administration of running workflows, setting workflow permissions, managing workflow versions and redirecting worklist items.
	SmartObject Runtime APIs and Services	If a workflow has been exposed as a K2 SmartObject, the workflow methods will be exposed as SmartObject methods and can be accessed with the SmartObject Runtime APIs.