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

# Introduction

> Learn what CrunchzApp API is, what it can do, and how to get started quickly.

<img
  className="block dark:hidden"
  src="https://mintlify.s3.us-west-1.amazonaws.com/crunchzapp/images/poster.png"
  alt="CrunchzApp Hero Light"
  style={{
borderRadius: '0.5rem',
marginBottom: '1.5rem',
}}
/>

<img
  className="hidden dark:block"
  src="https://mintlify.s3.us-west-1.amazonaws.com/crunchzapp/images/poster.png"
  alt="CrunchzApp Hero Dark"
  style={{
borderRadius: '0.5rem',
marginBottom: '1.5rem',
}}
/>

# 👋 Welcome to the CrunchzApp API

CrunchzApp helps businesses automate and scale their WhatsApp communication using their own WhatsApp numbers — with no need for third-party providers.

This API is designed for developers who want full control, smart automation, and personalized messaging at scale.

<CardGroup cols={2}>
  <Card title="Quick Start" icon="rocket" href="../setup" color="#3565F7">
    Get up and running with CrunchzApp API in minutes
  </Card>

  <Card title="API Reference" icon="code" href="../reference/overview" color="#3565F7">
    Explore the complete API documentation
  </Card>
</CardGroup>

## ⚙️ How It Works

<Steps>
  <Step title="Connect Your WhatsApp Number">
    CrunchzApp connects directly to your WhatsApp number via a **Channel**. This gives you full control over your messaging without relying on third-party numbers.
  </Step>

  <Step title="Get Your API Token">
    Once connected, you'll receive a secure token to authenticate your API requests:

    * A **Channel Token** (for one specific number)
    * A **Global Token** (for managing multiple numbers)

    No need to specify which token type — our API auto-detects it.
  </Step>

  <Step title="Start Messaging">
    Use our RESTful API to send messages, manage contacts, and automate responses. Our API supports JSON for request and response formats.
  </Step>

  <Step title="Monitor and Optimize">
    Track delivery rates, engagement metrics, and automation performance through our dashboard or API endpoints.
  </Step>
</Steps>

<Callout type="info" title="Try it now">
  Jump into the [Setup Guide](../setup) or the [API Reference](../reference/overview) to send your first message in minutes.
</Callout>

## 💬 Need Help?

<CardGroup cols={3}>
  <Card title="Email Support" icon="envelope" href="mailto:support@crunchz.app">
    Contact our team at [support@crunchz.app](mailto:support@crunchz.app)
  </Card>

  <Card title="FAQs" icon="question-circle" href="../faq">
    Browse our frequently asked questions
  </Card>

  <Card title="Changelog" icon="code-branch" href="../changelog">
    Stay updated with our latest features
  </Card>
</CardGroup>

***

<Note>
  Ready to transform your WhatsApp communication? [Sign up](https://panel.crunchz.app) for a free account today and get started with 7 days free trial!.
</Note>

Let's build something powerful with CrunchzApp.