# Introduction

Workflow REST APIs can only be invoked from within a running workflow instance. It is secured by a token and the workflow node instance status. These APIs can only be invoked when the node instance is in the `Running` status.

![Sample Workflow Instance View](https://754235390-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MZ64BhrvkgPMyL9F3tk%2F-MavZP911TnudP7_RJa8%2F-Mavfw18xP4G-wcty328%2Fimage.png?alt=media\&token=ddb80ea0-9c1f-4f5c-86e7-2b79eb2ecd37)