> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fastgen.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

## Overview

The API builder is the heart of the Fastgen platform and enables you to quickly create any kind of REST API. For each endpoint you can configure unqiue Authentication and Validation rules.

### Action Panel

You build your APIs through a drag and drop action panel which provides you with:

<Tabs>
  <Tab title="Flow Controls">
    [Flow Controls](/actions/flow-control) give the API structure and specify what it should execute depending on the data that is received.
  </Tab>

  <Tab title="Native Actions">
    [Native Actions](/actions/native-action) are execution blocks which let you query a DB, inject custom code or call any other API via an HTTP request.
  </Tab>

  <Tab title="Integrations">
    [Integrations](/actions/integrations) let you interact with popular third party services like Slack, Stripe, Sendgrid or ChatGPT.
  </Tab>

  <Tab title="Responses">
    [Responses](/actions/responses) let you return success or error status codes and display a JSON message.
  </Tab>
</Tabs>