# sipgate AI Flow

> SDK Documentation

Build AI-powered voice assistants with real-time speech processing

## Table of Contents

### Getting Started

- [API Reference](/sipgate-ai-flow-api/api.md)
- [Authentication](/sipgate-ai-flow-api/api/authentication.md)
- [Quick Start](/sipgate-ai-flow-api/api/quick-start.md)

### Protocol

- [HTTP Webhooks](/sipgate-ai-flow-api/api/http-webhooks.md)
- [WebSocket Integration](/sipgate-ai-flow-api/api/websocket.md)
- [Event Flow](/sipgate-ai-flow-api/api/event-flow.md)

### Guides

- [Outbound Calls](/sipgate-ai-flow-api/api/guides/outbound-calls.md)
- [Phone Number Routing: Multiple Assistants, One Webhook](/sipgate-ai-flow-api/api/guides/phone-number-routing.md)
- [Streaming LLM Responses: Sentence-by-Sentence Best Practices](/sipgate-ai-flow-api/api/guides/streaming-llm-responses.md)
- [Barge-In Best Practices: Handling User Interruptions Gracefully](/sipgate-ai-flow-api/api/guides/barge-in-best-practices.md)
- [Handling Long-Running Requests in Voice AI: The Async Hold Pattern](/sipgate-ai-flow-api/api/guides/async-hold-pattern.md)
- [Testing Voice Assistants Without Making Phone Calls](/sipgate-ai-flow-api/api/guides/testing-voice-assistants.md)

### Events

- [Event Types](/sipgate-ai-flow-api/api/events.md)
- [Session Start Event](/sipgate-ai-flow-api/api/events/session-start.md)
- [User Speech Started Event](/sipgate-ai-flow-api/api/events/user-speech-started.md)
- [User Speak Event](/sipgate-ai-flow-api/api/events/user-speak.md)
- [Assistant Speak Event](/sipgate-ai-flow-api/api/events/assistant-speak.md)
- [Assistant Speech Ended Event](/sipgate-ai-flow-api/api/events/assistant-speech-ended.md)
- [DTMF Received Event](/sipgate-ai-flow-api/api/events/dtmf-received.md)
- [Session End Event](/sipgate-ai-flow-api/api/events/session-end.md)

### Actions

- [Action Types](/sipgate-ai-flow-api/api/actions.md)
- [Speak Action](/sipgate-ai-flow-api/api/actions/speak.md)
- [Audio Action](/sipgate-ai-flow-api/api/actions/audio.md)
- [Mix Audio Action](/sipgate-ai-flow-api/api/actions/mix-audio.md)
- [Hangup Action](/sipgate-ai-flow-api/api/actions/hangup.md)
- [Transfer Action](/sipgate-ai-flow-api/api/actions/transfer.md)
- [Barge-In Action](/sipgate-ai-flow-api/api/actions/barge-in.md)
- [Configure Transcription Action](/sipgate-ai-flow-api/api/actions/configure-transcription.md)
- [Configure Voice-to-Voice Action](/sipgate-ai-flow-api/api/actions/configure-voice-to-voice.md)
- [Send SMS Action](/sipgate-ai-flow-api/api/actions/send-sms.md)

### Configuration

- [TTS Providers](/sipgate-ai-flow-api/api/tts-providers.md)
- [Barge-In Configuration](/sipgate-ai-flow-api/api/barge-in.md)
- [VAD (Voice Activity Detection) Configuration](/sipgate-ai-flow-api/api/vad.md)

### Getting Started

- [SDK Guide](/sipgate-ai-flow-api/sdk.md)
- [Installation](/sipgate-ai-flow-api/sdk/installation.md)
- [Quick Start](/sipgate-ai-flow-api/sdk/quick-start.md)

### Core Concepts

- [Core Concepts](/sipgate-ai-flow-api/sdk/core-concepts.md)
- [Response Types](/sipgate-ai-flow-api/sdk/response-types.md)

### API Reference

- [API Reference](/sipgate-ai-flow-api/sdk/api-reference.md)
- [Event Types](/sipgate-ai-flow-api/sdk/events.md)
- [Action Types](/sipgate-ai-flow-api/sdk/actions.md)
- [TTS Providers](/sipgate-ai-flow-api/sdk/tts-providers.md)
- [Barge-In Configuration](/sipgate-ai-flow-api/sdk/barge-in.md)
- [VAD (Voice Activity Detection) Configuration](/sipgate-ai-flow-api/sdk/vad.md)

### Integration Guides

- [Express.js Integration](/sipgate-ai-flow-api/sdk/integrations/express.md)
- [WebSocket Integration](/sipgate-ai-flow-api/sdk/integrations/websocket.md)
- [Outbound Calls](/sipgate-ai-flow-api/sdk/outbound-calls.md)
- [Examples](/sipgate-ai-flow-api/sdk/examples.md)

### Advanced

- [Working Without the Assistant Wrapper](/sipgate-ai-flow-api/sdk/advanced/direct-integration.md)
- [Complete Event Reference](/sipgate-ai-flow-api/sdk/advanced/events.md)
- [Complete Action Reference](/sipgate-ai-flow-api/sdk/advanced/actions.md)
- [Validation with Zod](/sipgate-ai-flow-api/sdk/advanced/validation.md)

### Troubleshooting

- [Troubleshooting](/sipgate-ai-flow-api/sdk/troubleshooting.md)

### Other

- [Changelog](/sipgate-ai-flow-api/changelog.md)
- [Documentation](/sipgate-ai-flow-api/README.md)
- [Documentation Setup Guide](/sipgate-ai-flow-api/SETUP.md)
- [User Input Timeout Event](/sipgate-ai-flow-api/api/events/user-input-timeout.md)