> For the complete documentation index, see [llms.txt](https://spreadapi.roombelt.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://spreadapi.roombelt.com/readme.md).

# 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](/files/-Lv_Nnu-JhstuNP4FhKI)

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="/pages/-LuOeXjz586TN9Anksv-" %}
[Setup](/setup.md)
{% endcontent-ref %}

{% content-ref url="/pages/-LuOlwEmHtUejmPyH64S" %}
[Usage](/usage.md)
{% endcontent-ref %}

{% content-ref url="/pages/-LuOebbvPCOzRESxMRIG" %}
[API Reference](/usage/usage.md)
{% endcontent-ref %}

{% content-ref url="/pages/-Lv0Oxz7Zf\_yNW5s9Fcu" %}
[Examples](/examples.md)
{% endcontent-ref %}


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# Agent Instructions
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## 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://spreadapi.roombelt.com/readme.md?ask=<question>
```

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.