Phone Numbers for
AI Agents
Get a real number, receive the SMS, extract the code, make a phone call — all in one API.
How It Works
Three steps. Zero friction.
Get a number
Provision a real SIM number in seconds via API. Choose country, type, and capabilities.
Connect your agent
Point your agent to the number with one API key. No human dashboard required.
Receive everything
Calls, SMS, and verification codes delivered instantly to your webhook endpoint. Fully async.
AI Voice Calls
Pick a voice. Make a call.
Your agent calls a real phone number, speaks with the AI voice you choose, and returns a full transcript. Click to preview each voice.
Alloy
Neutral & Balanced
Default voice. Clean, clear, works for any scenario.
Best for: General purpose
Ash
Warm & Conversational
Friendly tone that puts people at ease.
Best for: Customer service
Ballad
Expressive & Melodic
Dynamic range with natural inflection.
Best for: Engaging conversations
Coral
Clear & Professional
Crisp, business-appropriate delivery.
Best for: B2B calls
Echo
Resonant & Deep
Authoritative presence with depth.
Best for: Formal inquiries
Sage
Calm & Authoritative
Steady, reassuring, and knowledgeable.
Best for: Healthcare, finance
Shimmer
Bright & Energetic
Upbeat and enthusiastic tone.
Best for: Sales, outreach
Verse
Smooth & Articulate
Polished and refined delivery.
Best for: Executive communication
Features
Everything an agent needs to communicate
Real SIM Numbers
Non-VoIP numbers that pass strict platform verification. No more blocked registrations.
Voice Calls
Agents can make and receive voice calls. Full duplex, low latency, programmable.
AI Voice Calls
Your agent makes phone calls with AI-powered conversation. Provide a system prompt — the AI handles the call and returns a transcript.
SMS Inbox
Dedicated SMS inbox per agent. Send, receive, and search messages via API.
Code Webhooks
Verification codes delivered instantly to your endpoint. Never miss a code again.
Agent Isolation
Each agent gets its own number. Compromise of one never cascades to others.
Use Cases
Powering every type of agent
From browser automation to customer service, AgentCall enables any agent to communicate via phone.
Verify your phone
Enter the code sent to your number
The Killer Feature
Verification codes solved
Your agent fills out a form, enters a real phone number, and clicks “Send Code.” AgentCall receives the SMS, extracts the 6-digit code, and returns it — all in one async call.
- Real numbers that pass Stripe, Google, and bank verification
- Verification codes auto-extracted from any SMS format
- waitForOTP() returns the code in one call
- Works via SDK, REST API, or MCP tool
// 1. Provision a number
const num = await ac.numbers.provision({
country: 'US', type: 'local'
})
// 2. Your agent enters the number on a form...
// 3. Wait for the OTP
const otp = await ac.sms.waitForOTP(num.id, {
timeout: 30000
})
console.log(otp) // "583016"
// 4. Agent enters the code — verified.Built for agents
| AgentCall | Traditional VoIP | Enterprise Telecom | |
|---|---|---|---|
| Real Phone Numbers (pass verification) | |||
| Voice Calls | |||
| AI Voice Calls | |||
| SMS Send & Receive | |||
| Auto-Reads Verification Codes | |||
| End-to-End SMS Verification Testing | |||
| MCP Server — Works Inside Claude, Cursor & Windsurf (19 Skills) | |||
| Separate Number Per Agent | |||
| Built for AI Agents | |||
| Usage-Based Pricing |
Pricing
Simple pricing that scales with your agents
Free
For experimentation and prototyping
- 1 phone number
- 10 SMS / month
- 5 voice minutes
- 5 code extractions / month
- Email support
Pro
Plus usage. No per-seat fees.
- Unlimited numbers (from $2/mo each)
- SMS at $0.015 / message
- Voice at $0.035 / minute
- AI voice calls at $0.20 / minute
- Call recording at $0.01 / minute
- 1 SIM number included, +$8/mo each additional
- Unlimited code extractions
- Priority email support
Resources
From the blog
Why Twilio and VoIP Don't Work for AI Agents
Standard VoIP numbers get blocked by Stripe, Google, and banks. Here's why SIM numbers are the answer.
Read more →OTP Verification for AI Agents: The Complete Guide
How to automate SMS verification testing end-to-end with real phone numbers and automatic code extraction.
Read more →5 Best Phone APIs for Developers Compared
AgentCall vs Twilio vs Telnyx vs Vonage vs Plivo — which phone API is right for your project?
Read more →Get started in seconds
Add AgentCall to your agent — no matter how it's built.
Get Started{
"mcpServers": {
"agentcall": {
"transport": "streamable-http",
"url": "https://api.agentcall.co/mcp",
"headers": { "Authorization": "Bearer YOUR_KEY" }
}
}
}Prefer plain REST? REST API Quickstart with curl examples →