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

# Gradium API Documentation

> Build voice apps with Gradium's low-latency Text-to-Speech and Speech-to-Text APIs, SDK guides, streaming examples, voices, and pronunciation tools.

## Get Started

Build voice-powered applications with the Gradium API. Our TTS and STT models deliver natural-sounding output with best-in-class accuracy, low latency, semantic VAD for turn-taking, and adaptive delay controls for realtime agents.

<CardGroup cols={2}>
  <Card title="Installation" icon="download" href="/guides/installation">
    Install the Python SDK and make your first API call.
  </Card>

  <Card title="Text-to-Speech" icon="volume-high" href="/guides/text-to-speech">
    Convert text to natural-sounding speech with streaming support.
  </Card>

  <Card title="Speech-to-Text" icon="microphone" href="/guides/speech-to-text">
    Transcribe audio in real time with semantic VAD and flush.
  </Card>

  <Card title="API Reference" icon="code" href="/api-reference/introduction">
    Explore the full REST and WebSocket API reference.
  </Card>
</CardGroup>

## Explore

<CardGroup cols={2}>
  <Card title="Voice Library" icon="user-music" href="/guides/voices/overview">
    Browse available voices or create custom voice clones.
  </Card>

  <Card title="Voice Settings" icon="sliders" href="/guides/voice-settings">
    Control speed, temperature, and voice similarity.
  </Card>

  <Card title="Turn-Taking" icon="comments" href="/guides/recipes/turn-taking">
    Use semantic VAD and adaptive delay for conversational agents.
  </Card>

  <Card title="GitHub Examples" icon="github" href="https://github.com/gradium-ai/gradbot/tree/main/demos">
    Browse complete voice-agent demos built with Gradium STT and TTS.
  </Card>
</CardGroup>