jsonapi-8.x-2.x-dev/jsonapi.routing.yml

route_callbacks:
  - '\Drupal\jsonapi\Routing\Routes::routes'

jsonapi.settings:
  path: '/admin/config/services/jsonapi'
  defaults:
    _form: 'Drupal\jsonapi\Form\JsonApiSettingsForm'
    _title: 'JSON:API'
  requirements:
    _permission: 'administer site configuration'