Default paragraph value from URI by using paragraphs_tools contrib module

  1. by using contrib module https://www.drupal.org/project/paragraphs_tools

  2. just visit a page:

  3. node/add/CONTENT_TYPE/?paragraphs-tools-autoadd=node:field_paragraph_reference:image_paragraph

  4. And you'll see paragraph reference "image_paragraph" is set by default