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name: elevenlabs-phone-reminder-lite description: Build AI phone call reminders with ElevenLabs Conversational AI + Twilio. Free starter guide. version: 1.0.0 author: LittleLobster license: MIT

📞 AI Phone Reminder (Lite)

Build an AI assistant that can call you on the phone with natural voice conversations!

🎯 What You'll Build

• AI agent that makes outbound phone calls
• Natural conversation with voice cloning
• Multi-language support (including Chinese, Japanese, etc.)
• Real-time voice interaction (not pre-recorded!)

📋 Prerequisites

1. ElevenLabs Account (Creator plan or above)

   • Sign up: https://elevenlabs.io
   • Includes 250 minutes/month of Conversational AI

2. Twilio Account

   • Sign up: https://twilio.com
   • Need: Account SID, Auth Token, Phone Number (~$1.15/month for US)

🏗️ Architecture

┌─────────────┐     ┌─────────────┐     ┌─────────────┐
│   Your App  │────▶│ ElevenLabs  │────▶│   Twilio    │
│  (trigger)  │     │ Conv. AI    │     │   (call)    │
└─────────────┘     └─────────────┘     └─────────────┘
                           │                    │
                           ▼                    ▼
                    ┌─────────────┐     ┌─────────────┐
                    │  AI Agent   │     │  Phone      │
                    │  (voice)    │◀───▶│  Network    │
                    └─────────────┘     └─────────────┘

🚀 Quick Start

Step 1: Get Your Credentials

# ElevenLabs
ELEVENLABS_API_KEY="your_api_key_here"

# Twilio (from console.twilio.com)
TWILIO_ACCOUNT_SID="ACxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
TWILIO_AUTH_TOKEN="your_auth_token_here"

Step 2: Buy a Twilio Phone Number

1. Go to Twilio Console → Phone Numbers → Buy a Number
2. Select a US number with Voice capability (~$1.15/month)
3. Enable international calling if needed (Geo Permissions)

Step 3: Create ElevenLabs Agent

curl -X POST "https://api.elevenlabs.io/v1/convai/agents/create" \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "My Reminder Agent",
    "conversation_config": {
      "agent": {
        "prompt": {
          "prompt": "You are a helpful assistant making reminder calls. Be friendly and concise.",
          "llm": "gemini-2.0-flash-001"
        },
        "first_message": "Hi! This is your AI assistant calling with a reminder.",
        "language": "en"
      },
      "tts": {
        "model_id": "eleven_multilingual_v2",
        "voice_id": "YOUR_VOICE_ID"
      }
    }
  }'

Step 4: Connect Twilio to ElevenLabs

curl -X POST "https://api.elevenlabs.io/v1/convai/phone-numbers/create" \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "phone_number": "+1XXXXXXXXXX",
    "provider": "twilio",
    "label": "My Reminder Line",
    "sid": "'$TWILIO_ACCOUNT_SID'",
    "token": "'$TWILIO_AUTH_TOKEN'"
  }'

Step 5: Make a Call!

curl -X POST "https://api.elevenlabs.io/v1/convai/twilio/outbound-call" \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "agent_id": "YOUR_AGENT_ID",
    "agent_phone_number_id": "YOUR_PHONE_NUMBER_ID",
    "to_number": "+1RECIPIENT_NUMBER"
  }'

💰 Cost Estimate

Item	Cost
ElevenLabs Creator	$22/month (250 min included)
Twilio US Number	~$1.15/month
Outbound call (US)	~$0.013/min
Outbound call (international)	~$0.15-0.30/min
Per 1-min reminder call	~$0.11-0.40

⚠️ Limitations of Lite Version

• Basic setup guide only
• No optimized voice parameters
• No error handling examples
• No scheduling/automation
• Community support only

🚀 Want More?

Premium Version includes:

• ✅ Optimized voice parameters (tested for natural sound)
• ✅ Complete automation scripts
• ✅ Multi-language configurations
• ✅ Error handling & retry logic
• ✅ Cron job integration
• ✅ Priority support

Get it on Virtuals ACP: [Coming Soon]

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Made with 🦞 by LittleLobster