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Overview

This guide will walk you through creating your first voice campaign with AI-powered phone conversations.

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Prerequisites

  • API key (contact your account manager)
  • Basic knowledge of REST APIs
  • cURL, JavaScript, or Python
  • Organization and User already created (see SMS Quick Start)

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Step 1: Create Voice Agent

curl -X POST https://api.teli.ai/v1/agents \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "agent_type": "voice",
    "agent_name": "Voice Sales Agent",
    "starting_message": "Hi {{first_name}},how can I help you today?",
    "prompt": "You are a professional voice assistant. Ask about their needs and offer solutions.",
    "voice_id": "11labs-Adrian",
    "language": "en-US",
    "organization_id": "{org_id}",
    "user_id": "{user_id}"
  }'
Choose from voices like “11labs-Adrian”, “11labs-Josh”, “11labs-Emily” for different tones!
Response: 
{
  "success": true,
  "agent_id": "1763487456442x530311914019296484",
  "agent_type": "voice",
  "voice_agent_id": "agent_76e782f267fad7f112b2339e2f",
  "voice_llm_id": "llm_76ba232bb992d5bc1ca3b83b6a00",
  "agent_name": "Voice Sales Agent",
  "powered_by": "Teli"
}
Save the voice_agent_id - you’ll need it to create campaigns!

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Step 2: Provision Phone Number

Voice campaigns require an outbound phone number. 
curl -X POST https://api.teli.ai/v1/voice/phone-numbers/create \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "area_code": "415",
    "user_id": "{user_id}",
    "organization_id": "{org_id}",
    "tenant_id": "{tenant_id}"
  }'
Response: 
{
  "success": true,
  "phone_number": "+14155551234",
  "phone_number_pretty": "+1 415-555-1234",
  "area_code": "415",
  "phone_number_type": "teli-voice",
  "powered_by": "Teli"
}
Phone numbers are instant - no approval needed! Choose any US/Canada area code.

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Step 3: Upload Contacts

curl -X POST https://api.teli.ai/v1/contacts/lists \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "list_name": "Voice Leads",
    "organization_id": "{org_id}",
    "user_id": "{user_id}",
    "contacts": [
      {
        "phone_number": "+15551234567",
        "first_name": "John",
        "last_name": "Doe",
        "email": "pranta@example.com"
      }
    ]
  }'

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Step 4: Create Voice Campaign

curl -X POST https://api.teli.ai/v1/voice/campaigns \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "leads": [
      {
        "phone_number": "+15551234567",
        "first_name": "John",
        "last_name": "Doe"
      }
    ],
    "voice_agent_id": "{voice_agent_id}",
    "agent_outbound_number": "{provisioned_phone}",
    "organization_id": "{org_id}",
    "tenant_id": "{tenant_id}"
  }'
Response: 
{
  "success": true,
  "campaign_id": "voice_campaign_4491036864fc",
  "contacts_count": 1,
  "invalid_leads_count": 0,
  "campaign_begin_time": "2025-11-21T21:40:13.089462",
  "campaign_end_time": "2025-11-28T21:40:13.089462",
  "message": "Campaign started successfully",
  "powered_by": "Teli"
}
Voice Campaign created! Calls will be placed automatically.

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What Happens Next?

  1. Calls Placed - Your contacts receive phone calls
  2. AI Conversations - AI agent conducts natural phone conversations
  3. Call Recording - All calls recorded and stored in S3
  4. Transcripts - Full transcripts with word-level timing
  5. Analytics - Sentiment analysis, call success metrics, cost tracking

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View Call History

Track your calls and listen to recordings: 
curl -X GET "https://api.teli.ai/v1/voice/calls?organization_id={org_id}&user_id={user_id}&is_admin=true&limit=10" \
  -H "X-API-Key: YOUR_API_KEY"
Response includes:
  • Call transcripts
  • Recording URLs
  • Sentiment analysis
  • Call success metrics
  • Duration and cost

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Advanced Voice Features

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Voicemail Detection

curl -X POST https://api.teli.ai/v1/agents \
  -d '{
    "agent_type": "voice",
    "detect_voicemail": true,
    "voicemail_message": "Hi, please call us back at 555-1234"
  }'

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Custom Voice Settings

curl -X POST https://api.teli.ai/v1/agents \
  -d '{
    "agent_type": "voice",
    "voice_speed": 0.9,
    "voice_temperature": 1.2,
    "ambient_sound": "coffee-shop",
    "interruption_sensitivity": 0.8
  }'

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Phone Number Linking

Link agents to phone numbers for inbound calls: 
curl -X POST https://api.teli.ai/v1/voice/phone-numbers/+14155551234/update-agent \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "agent_id": "{voice_agent_id}"
  }'

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Next Steps

View Call History

Track and analyze calls

Manage Phone Numbers

View your phone numbers

Try SMS Campaigns

Get started with SMS

API Reference

Explore all endpoints

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Next Steps

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Need Help?

  • Support: support@teli.ai
  • Documentation: Full API reference in Partner API tab
  • Community: Join our Telegram group