# Frontend extentions - [Login redirect](https://navixy.com/docs/navixy-api/user-api/frontend/login-redirect.md) - [extensions](https://navixy.com/docs/navixy-api/user-api/frontend/extensions.md) - [App: Courier on the map](https://navixy.com/docs/navixy-api/user-api/frontend/extensions/delivery-app.md): Delivery is a special plugin which can be embedded to any other application or website and allows track user's task by external ID and bounded tracker in the real time. - [mobile-tracker](https://navixy.com/docs/navixy-api/user-api/frontend/extensions/mobile-tracker.md) - [UI plugins](https://navixy.com/docs/navixy-api/user-api/frontend/extensions/ui-plugins.md): Information about adding 3rd-party apps to the marketplace and UI with the help of developers and support --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://navixy.com/docs/navixy-api/user-api/frontend.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.