---
name: ai-phone-tree-builder-from-description
title: "AI Phone Tree Builder"
description: "AI Phone Tree Builder — describe your business in English, AI creates a working phone system."
language: python
framework: flask
telnyx_products: [AI Inference]
---

# AI Phone Tree Builder

AI Phone Tree Builder — describe your business in English, AI creates a working phone system.

## Telnyx API Endpoints Used

- **AI Inference**: `POST /v2/ai/chat/completions` — [API reference](https://developers.telnyx.com/api/inference/chat-completions)

## Architecture

```
  API Request
        │
        ▼
  ┌──────────────────┐
  │ Answer + Greet    │ ── TTS welcome message
  └────────┬─────────┘
           │
           ▼
  ┌──────────────────┐
  │ Listen for Input  │
  └────────┬─────────┘
           │
           ▼
  ┌──────────────────┐
  │ AI Inference      │
  │ • Business logic   │
  └────────┬─────────┘
           │ ◄──── conversation loop
           │
           ▼
     JSON response
```

## How It Works

1. Sends conversation to Telnyx AI Inference for processing
2. Transfers call to human agent when needed

## Why Telnyx

Telnyx is an **AI Communications Infrastructure** platform — voice, messaging, SIP, AI, and IoT on one private, global network.

- **Co-located inference** — LLM runs on the same network as voice traffic. Sub-200ms round trips.

## Environment Variables

Copy `.env.example` to `.env` and fill in:

| Variable | Type | Example | Required | Description | Where to get it |
|----------|------|---------|----------|-------------|-----------------|
| `TELNYX_API_KEY` | `string` | `KEY0123456789ABCDEF` | **yes** | Telnyx API v2 key | [Portal](https://portal.telnyx.com/api-keys) |
| `AI_MODEL` | `string` | `moonshotai/Kimi-K2.6` | no | Telnyx AI Inference model name | [Portal](https://developers.telnyx.com/docs/inference/models) |
| `PORT` | `integer` | `5000` | no | HTTP server port | — |

## Setup

```bash
git clone https://github.com/team-telnyx/telnyx-code-examples.git
cd telnyx-code-examples/ai-phone-tree-builder-from-description-python
cp .env.example .env    # ← fill in your credentials
pip install -r requirements.txt
python app.py           # starts on http://localhost:5000
```

## API Reference

### `POST /generate`

Describe your business, get a complete AI Assistant + TeXML phone tree.

```bash
curl -X POST http://localhost:5000/generate \
  -H "Content-Type: application/json" \
  -d '{}'
```

**Response:**

```json
{
  "id": "item-1750280400",
  "status": "created",
  "created_at": "2026-07-15T14:30:00Z"
}
```

### `GET /health`

Returns health

```bash
curl http://localhost:5000/health
```

**Response:**

```json
{
  "status": "ok",
  "uptime_seconds": 3842,
  "active_sessions": 2,
  "version": "1.0.0"
}
```

## Troubleshooting

- **Connection refused on port 5000**: App isn't running. Run `python app.py` and check no other process uses port 5000.
- **401 Unauthorized**: Your `TELNYX_API_KEY` is invalid. Generate a new one at [portal.telnyx.com/api-keys](https://portal.telnyx.com/api-keys).
- **AI response slow/empty**: Verify model name. See available models at [developers.telnyx.com](https://developers.telnyx.com/docs/inference/list-models).

## Related Examples

- [run-llm-inference-python](https://raw.githubusercontent.com/team-telnyx/telnyx-code-examples/main/run-llm-inference-python/README.md) - Standalone inference
- [build-voice-ai-agent-python](https://raw.githubusercontent.com/team-telnyx/telnyx-code-examples/main/build-voice-ai-agent-python/README.md) - Voice AI agent

## Resources

- [AI Inference Guide](https://developers.telnyx.com/docs/inference)
- [Telnyx Developer Docs](https://developers.telnyx.com)
- [Telnyx Portal](https://portal.telnyx.com)