# Overview

The **Shipium Javascript Local API** provides a client interface for retrieving product Delivery Estimates and subsequently registering the estimates and Order details with the Shipium service.

The API takes care of the following concerns:

- Generating an OAuth token for a user and storing the token for future use in a cookie on your Customer's browser.
- Providing a simple functional interface to call the Shipium service for a Delivery Estimate.
- Formatting the resulting Delivery Estimate for easy use by the implementor.
- Maintaining a list of Delivery Estimate IDs on the customer's browser in local storage.
- Providing a simple functional interface to call the Shipium service to register Delivery Estimates after a customer has completed checking out.

### Note

The **Shipium JavaScript Local API** provides support for all of the major production functions of the Shipium APIs, but may lag slightly behind more recent versions of the pure REST API.

### Roll your own

The Javascript Local API is provided to make integration easier, but you are also welcome to integrate with the APIs directly using the [Shipium API](https://docs.shipium.com/docs/api-listing).