drupal/core/modules/editor/editor.routing.yml

editor.filter_xss:
  path: '/editor/filter_xss/{filter_format}'
  defaults:
    _controller: '\Drupal\editor\EditorController::filterXss'
  requirements:
    _entity_access: 'filter_format.use'

editor.field_untransformed_text:
  path: '/editor/{entity_type}/{entity}/{field_name}/{langcode}/{view_mode_id}'
  defaults:
    _controller: '\Drupal\editor\EditorController::getUntransformedText'
  options:
    parameters:
      entity:
        type: entity:{entity_type}
  requirements:
    _permission: 'access in-place editing'
    _access_quickedit_entity_field: 'TRUE'

editor.image_dialog:
  path: '/editor/dialog/image/{editor}'
  defaults:
    _form: '\Drupal\editor\Form\EditorImageDialog'
    _title: 'Upload image'
  requirements:
    _entity_access: 'editor.use'

editor.link_dialog:
  path: '/editor/dialog/link/{editor}'
  defaults:
    _form: '\Drupal\editor\Form\EditorLinkDialog'
    _title: 'Add link'
  requirements:
    _entity_access: 'editor.use'