# Retellai Install Auth

> "Retell AI install auth \u2014 AI voice agent and phone call automation.\n\ Use when working with Retell AI for voice agents, phone calls, or telephony.\nTrigger\ \ with phrases like \"retell install auth\", \"retellai-install-auth\", \"voice\ \ agent\".\n"

- Skill: `thedixitjain/retellai-install-auth` (Agent Skill)
- Install (CLI): `npx skillmds add thedixitjain/retellai-install-auth`
- Raw SKILL.md: https://api.skillmd.com/api/skills/thedixitjain/retellai-install-auth/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: thedixitjain (https://skillmd.com/u/thedixitjain)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/thedixitjain/retellai-install-auth

---


# Retell AI Install Auth

## Overview

Install the Retell AI SDK and configure API key authentication for building voice agents.

## Prerequisites

- Retell AI account at retellai.com
- API key from the Retell AI dashboard
- Node.js 18+ or Python 3.9+

## Instructions

### Step 1: Install SDK

```bash
set -euo pipefail
# Node.js
npm install retell-sdk

# Python
pip install retell-sdk
```

### Step 2: Configure Environment

```bash
# .env
RETELL_API_KEY=key_xxxxxxxxxxxxxxxxxxxxxxxx
```

### Step 3: Initialize Client (Node.js)

```typescript
import Retell from 'retell-sdk';

const retell = new Retell({ apiKey: process.env.RETELL_API_KEY! });

// Verify connection — list agents
const agents = await retell.agent.list();
console.log(`Connected! ${agents.length} agent(s) configured.`);
```

### Step 4: Initialize Client (Python)

```python
from retell import Retell
import os

retell = Retell(api_key=os.environ["RETELL_API_KEY"])
agents = retell.agent.list()
print(f"Connected! {len(agents)} agent(s) configured.")
```

## Output

- `retell-sdk` installed
- API key configured
- Connection verified with agent listing

## Error Handling

| Error | Cause | Solution |
|-------|-------|----------|
| `401 Unauthorized` | Invalid API key | Verify key in Retell Dashboard |
| `ModuleNotFoundError` | SDK not installed | `npm install retell-sdk` |
| Connection timeout | Network issue | Check firewall allows HTTPS |

## Resources

- [Retell AI SDKs](https://docs.retellai.com/get-started/sdk)
- [retell-sdk npm](https://www.npmjs.com/package/retell-sdk)

## Next Steps

Create your first agent: `retellai-hello-world`

---

**Source:** [`jeremylongshore/claude-code-plugins-plus-skills`](https://github.com/jeremylongshore/claude-code-plugins-plus-skills) → `skills/.curated/retellai-install-auth/SKILL.md`

**Also appears in:** `jeremylongshore/claude-code-plugins-plus-skills/plugins/saas-packs/retellai-pack/skills/retellai-install-auth/SKILL.md`