Is there any way to get the spec as json without calling doc/api.json?

[SMILEY4]

Hi, you can get the json-string from ApiSpec.get(PluginConfigDsl.DEFAULT_SPEC_ID) after its built by its id. By default, i.e. if you are not using multiple specs and the default configuration, the id is always PluginConfigDsl.DEFAULT_SPEC_ID, otherwise the one you assigned. Another option is the "post-build"-hook in the plugin config that is called with the finished OpenAPI-object.

install(SwaggerUi) {
   postBuild = { openApiSpec ->
      // ...
   }
}