Is there any link to open composer (for hyperlink)?

[techAPJ (Arpit Jalan)]

Yes, is this what you are looking for @Pad_Pors?

Creating a link to start a new topic with pre-filled information

This documentation explains how to create a link that starts a new topic in Discourse with pre-filled information. Required user level: All users Sometimes you may want to provide users with a link that opens a new topic composer with certain information pre-filled. This can be useful for various use cases including bug report templates, feature requests, or standardized posts. Constructing the URL Base URL To compose a new pre-filled topic with no extra i…