# Smartsheet API introduction

The Smartsheet API enables you to programatically access and manage your organization's Smartsheet resources. The [API Reference](/api/smartsheet/openapi) includes object schemas, operation specifications, and code snippets for [Sheets](/api/smartsheet/openapi/sheets), [Folders](/api/smartsheet/openapi/folders), [Users](/api/smartsheet/openapi/users), and more.

> **Important:**
* The Smartsheet API is restricted to users on Business and Enterprise plans
* The Developer Agreement governs the use of the Smartsheet API and Smartsheet software development kits (SDKs)



## Try the API

You can call operations from within the site via our **Try it** request editor.

![](/assets/call-an-operation.378ffc7b354bfff6927e2825ec137c16fcfca90bbd9da36677a15b8a8ef5c67e.6d36fe45.gif)

It's just that easy to start using the API!

## Base URL

Smartsheet: `https://api.smartsheet.com/2.0`

> **Important:** Smartsheet Gov and Smartsheet Regions Europe use the respective base URLs:
- Smartsheet Gov: `https://api.smartsheetgov.com/2.0`
- Smartsheet Regions Europe: `https://api.smartsheet.eu/2.0`
- Smartsheet Regions Australia: `https://api.smartsheet.au/2.0`



## What's next?

- [Get started](/api/smartsheet/guides/getting-started) calling operations via our **Try it** request editor.
- [Basics](/api/smartsheet/guides/basics) explains the fundamentals of using the Smartsheet API
- [OpenAPI Reference](/api/smartsheet/openapi): skip ahead to learn about resource endpoints and objects, including [Sheets](/api/smartsheet/openapi/sheets), [Cells](/api/smartsheet/openapi/cells), [Folders](/api/smartsheet/openapi/folders), and more
- [Smartsheet SDKs and samples](/api/smartsheet/guides/additional-resources), for streamlined interfaces in C#, Java, Node.js, and Python