# Introduction

SpreadAPI is a free Google Apps Script that allows you to add REST API to any spreadsheet in Google Sheets in a few minutes. The API can be accessed over HTTPS from back-end as well as front-end apps.

![SpreadAPI architecture](https://729184105-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LuOePOEMwOprb7WJaWG%2F-LvZlxX8lcnbKtR9vmQ_%2F-Lv_Nnu-JhstuNP4FhKI%2Fimage.png?alt=media\&token=03994b5f-7c33-4880-9096-323c35daabb4)

SpreadAPI is a free alternative to tools like [sheetsu.com](https://sheetsu.com/), [sheetdb.io](https://sheetdb.io/) or [sheety.co](https://sheety.co/). With SpreadAPI you get just the same but for free. Moreover, you don't share the data with any third party because the code runs on your account as a Google Apps Script.

{% hint style="info" %}
SpreadAPI is maintained by the author of [Roombelt](https://roombelt.com) - a simple and reliable meeting room display system.\
\
If you want to support SpreadAPI consider trying [Roombelt](https://roombelt.com) in your company!
{% endhint %}

{% content-ref url="setup" %}
[setup](https://spreadapi.roombelt.com/setup)
{% endcontent-ref %}

{% content-ref url="usage" %}
[usage](https://spreadapi.roombelt.com/usage)
{% endcontent-ref %}

{% content-ref url="usage/usage" %}
[usage](https://spreadapi.roombelt.com/usage/usage)
{% endcontent-ref %}

{% content-ref url="examples" %}
[examples](https://spreadapi.roombelt.com/examples)
{% endcontent-ref %}