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

# Introduction

> Build, deploy, and manage AI voice agents with the Colloqui API.

Colloqui is a voice agent platform that lets you build AI-powered phone agents entirely through the API. An agent bundles everything in a single resource — the LLM, the prompt, speech-to-text, text-to-speech, and tools — so there's no wiring between separate models.

## Key concepts

* **Agents** — A single resource containing your LLM, prompt, STT, TTS, and tool configuration.
* **Versioning** — Agents follow a draft → publish lifecycle. Edits are mutable; publishing creates an immutable version.
* **Numbers** — Phone numbers that route inbound calls to your published agent.
* **Tools** — Actions your agent can take mid-call: transfer, hang up, send SMS, press IVR keys, call your APIs, or extract variables.
* **Knowledge bases** — Upload documents, URLs, or text so your agent can answer questions grounded in your data.

## Next steps

<CardGroup cols={2}>
  <Card title="Quick start" href="/get-started/quickstart">
    Create and call your first agent in five minutes.
  </Card>

  <Card title="API reference" href="/api-reference/introduction">
    Explore every endpoint.
  </Card>
</CardGroup>