REST APIs are a common functionality in modern web apps that are frequently used.

This is why we focus on making this process consistent.
This makes it much easier to develop new endpoints in your API.

For example, validation errors are displayed automatically as noted in Restangular.

Laravel Angular Material Starter provides helps you standardize the format of your API's return data.
Errors responses have a specific format and success responses have another one.
It also benefits from this consistency on the front-end, by configuring response interceptors that will automatically open a toast that will show validation error.

All of this is provided with optional Json Web Token Authentication support and useful API test helpers that will make integration testing easier.