Hello Sanath,

Currently, this would not be possible via the Rest API as you would not have a way to communicate back to the document where the errors are. Instead, you would want to approach this scenario via the Extension API, likely through its `document contents` functionality: https://developer.lucid.co/docs/editor-extension-document-content. With that, users could validate real time while in the Lucid editor like you describe.

One important note is that some extension functionality do not run when viewing a document as an embed. But, as long as someone opens the document in lucid.app the extension would run and the validations would be ran.

Hi Michael,

Thanks for the response. So if we are proceeding with extension API then we no longer require web application and user can directly see those validations in their lucid.app document if they download the package in there lucid.app ?

Is my understanding right. If so can you also please guide on how can I take the inital steps.

Correct, with some clarification.

Any collaborator on the application which contains the extension will see the validation when in Lucid. Additionally, the application could be privately published and pushed to all users if you wanted everyone on the account to have access.

Here are some resources that elaborate:

• Building on the Extension API
  • https://developer.lucid.co/docs/extension-api-getting-started
• Sharing an application so other users can use your extension
  • https://developer.lucid.co/docs/application-collaborator-roles
• Publishing privately so everyone on the account has the extension
  • https://developer.lucid.co/docs/publishing#private-publishing
• Reading from and writing to the editor in a Lucid document
  • https://developer.lucid.co/docs/editor-extension-document-content

I am happy to further clarify any details.