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

# Introduction

> Build production-ready AI chat and voice agents with the Agntix API.

Agntix is the API for building **AI chat and voice agents**. One platform, three deployable surfaces:

<CardGroup cols={3}>
  <Card title="Chat" icon="comments" href="/guides/build-your-first-agent">
    Conversational text agents you can embed in a web widget, mobile app, or back-office tool.
  </Card>

  <Card title="Voice" icon="phone" href="/guides/voice-calls">
    Sub-second TTS / STT pipelines over LiveKit, Twilio, or Telnyx — inbound or outbound.
  </Card>

  <Card title="WhatsApp" icon="whatsapp" href="/guides/build-your-first-agent">
    Wire any agent to a WhatsApp business number via Twilio.
  </Card>
</CardGroup>

## Why Agntix

* **Multi-modal out of the box.** Same agent definition runs in chat, voice, and WhatsApp.
* **Production-grade reliability.** A unified gateway, durable webhooks, persistent sessions, retry-aware call campaigns.
* **Bring your own model.** GPT, Claude, Gemini, plus any OpenAI-compatible endpoint.
* **First-class RAG.** Upload documents, get cited answers — no vector DB to manage.
* **Predictable pricing.** Per-second voice and per-1k-token chat. See [pricing](https://agntix.ai/pricing).

## How this works

All Agntix APIs are served from a single base URL behind the API gateway:

```text theme={null}
https://api.agntix.ai
```

The gateway routes traffic to the appropriate upstream service based on the path prefix. As a customer
you only ever talk to `api.agntix.ai` — internal service URLs are not exposed.

You'll mostly interact with three resources:

1. **[Agents](/api-reference/agents)** — the configuration: prompt, model, tools, voice profile, knowledge store.
2. **[Sessions](/api-reference/chat)** — a single conversation between a user and an agent.
3. **[Messages](/api-reference/chat)** — the turns inside a session.

Real-time updates flow over [Server-Sent Events](/guides/streaming-events) for live UIs and [Webhooks](/webhooks/overview) for back-office workflows.

## Where to next

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Make your first authenticated call in under five minutes.
  </Card>

  <Card title="Build your first agent" icon="wand-magic-sparkles" href="/guides/build-your-first-agent">
    Walkthrough: from API key to a working agent that answers user questions.
  </Card>

  <Card title="API Reference" icon="code" href="/api-reference/introduction">
    The full, auto-generated reference for every public endpoint.
  </Card>

  <Card title="SDKs & examples" icon="square-code" href="/sdks/overview">
    Copy-paste examples in cURL, Node.js, and Python.
  </Card>
</CardGroup>

## Need help?

* **Status & incidents:** [status.agntix.ai](https://status.agntix.ai)
* **Email support:** [support@agntix.ai](mailto:support@agntix.ai)
* **Changelog:** [/changelog](/changelog)