Hi Rajput,
I was not able to find any url related to opensource whiteboard API. Webex got Content Viewer : Displays presentations, documents, video files, whiteboards, and Web content.
You can annotate files and whiteboards that you share during a session. If you grant permissions, attendees can use both text and graphics tools to highlight, add notes, and create basic images. Then, all documents can be saved and distributed.
On the Share menu, choose Whiteboard.
Note: You can share multiple whiteboards. For each whiteboard that you share, a new Whiteboard tab will be created in the content viewer.
Thanks and Regards,
Geevarghese
