Question 1

What is AgentCall?

Accepted Answer

AgentCall is a phone number API built for AI agents. It lets autonomous software provision real SIM phone numbers, send and receive SMS, make voice calls, and automatically extract OTP verification codes — all through a simple REST API with webhook delivery.

Question 2

How much does AgentCall cost?

Accepted Answer

AgentCall has a free tier ($0/month) with 1 phone number, 50 SMS, and 10 voice minutes. The Pro plan is $19.99/month plus usage: numbers at $2/month each, SMS at $0.015/message, voice at $0.035/minute, and SIM numbers at $8/month each.

Question 3

How does AgentCall work?

Accepted Answer

Sign up and get an API key in 30 seconds. Use one API call to provision a real phone number. Set a webhook URL to receive SMS and call events. Your agent receives OTPs, messages, and calls in real time — no polling, no manual intervention.

Question 4

Who is AgentCall for?

Accepted Answer

AgentCall is built for AI agent developers, browser automation teams, AI voice agent builders, and SaaS platforms that need to give their autonomous software real phone capabilities — account verification, SMS conversations, voice calls, and OTP extraction.

Question 5

What is the difference between AgentCall and Twilio?

Accepted Answer

Twilio is built for human developers building traditional apps. AgentCall is purpose-built for AI agents — it offers real SIM numbers (not VoIP) that pass strict verification, automatic OTP extraction, per-agent isolation, and an agent-native API. Twilio's VoIP numbers often get blocked by platforms.

Question 6

Does AgentCall provide real SIM numbers?

Accepted Answer

Yes. AgentCall offers real SIM and non-VoIP numbers at $8/month each. These pass strict platform verification checks from services like Stripe, Google, and banks that block standard VoIP numbers. Local and toll-free numbers are also available at $2/month.

Question 7

Can AgentCall extract OTP codes automatically?

Accepted Answer

Yes. When an SMS containing a verification code arrives at an AgentCall number, the OTP is automatically detected and extracted. It's delivered to your webhook endpoint instantly so your agent can use it without parsing the message body manually.

Question 8

What countries does AgentCall support?

Accepted Answer

AgentCall currently supports phone numbers in the United States, Canada, and United Kingdom. You can provision local, toll-free, mobile, and SIM numbers in these countries. More countries are being added based on demand.

	AgentCall	Twilio	Telnyx
Real SIM / Non-VoIP Numbers
Voice Calls
SMS Send & Receive
OTP Auto-Detection
Agent Isolation
Agent-Native SDK
Usage-Based Pricing

Phone Numbers for
AI Agents

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Everything an agent needs to communicate

Real SIM Numbers

Voice Calls

SMS Inbox

OTP Webhooks

Agent Isolation

Usage-Based Pricing

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Verify your phone

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Phone Numbers forAI Agents