Jira Workflow API Diagram

[Fida Zubair]

Is there an API where you can get the Diagram/Image of the Jira workflow, in order to give the users a preview of how the workflow would look like.

[Deepanshu Natani]

No, there is no such API available @Fida Zubair 

[Aron Gombas _Midori_]

It is not the diagram image, but this app can export you a readable textual description of the workflow:

https://marketplace.atlassian.com/apps/1219628/glass-project-documentation-for-jira?tab=overview&hosting=cloud

It may or may not work for you.