Phone Number API for AI Agents

Provision real SIM numbers, send SMS, make voice calls, and extract OTPs automatically — all via a single REST API. Non-VoIP numbers that pass strict verification.

Start Free View Pricing
< 5s
Number provisioning
99.9%
SMS delivery rate
< 200ms
Webhook latency
3
Countries supported

How It Works

Your agent gets a real phone number in under 60 seconds.

130 sec

Sign Up

Create an account and get your API key instantly.

25 sec

Provision Number

One API call — choose country, type, and capabilities.

31 min

Set Webhook

Point your webhook URL to receive SMS, call, and verification code events.

4Real-time

Go Live

Calls, SMS, and verification codes delivered to your endpoint instantly.

Key Features

Everything an AI agent needs to communicate via phone.

Verification Code Extraction

The #1 blocker for autonomous agents: phone verification. AgentCall's numbers pass Stripe, Google, and bank checks. Codes are auto-extracted and returned by waitForOTP() in one call.

Real SIM Numbers

Non-VoIP numbers that pass Stripe, Google, and bank verification. 1 SIM included with Pro, from $2/mo for local.

AI Voice Calls

Your agent makes phone calls with AI-powered conversation. 8 voices, system prompt, first message, transcript. $0.20/min.

Voice Calls

Make and receive voice calls programmatically. Full duplex, low latency, AI voice provider compatible.

SMS Inbox

Dedicated SMS inbox per number. Send, receive, and search messages via REST API.

Separate Number Per Agent

Each agent gets its own number. Compromise or ban of one never cascades to others.

Usage-Based Pricing

No per-seat fees or minimums. Pay only for the numbers, minutes, and messages you use.

Multi-Country

Provision numbers in the US, Canada, and UK. Choose local, toll-free, mobile, or SIM type.

Webhook Delivery

Real-time event delivery for SMS received, calls incoming, verification code detected. Fully async, no polling.

AgentCall vs Traditional Phone APIs

Purpose-built for AI agents — not retrofitted general-purpose telecom.

FeatureAgentCallTraditional VoIPEnterprise Telecom
Built for AI Agents
Real Phone Numbers (pass verification)
Auto-Reads Verification Codes
AI Voice Calls
End-to-End SMS Verification Testing
MCP Server — Works Inside Claude, Cursor & Windsurf (19 Skills)
Voice Calls
SMS Send & Receive
Separate Number Per Agent
Webhook Event Delivery
Free Tier
Base Price$0 / $19.99/moPay-as-you-goPay-as-you-go
Number Cost$2–$8/mo$1.15–$6/mo$1–$5/mo
SMS Price$0.015/msg$0.0079/msg$0.004/msg
Voice Price$0.035/min$0.014/min$0.01/min
Setup Time< 1 minute10–30 minutes10–30 minutes
Contract Required
Best ForAI agents & automationGeneral telecom appsEnterprise SIP trunking

Who It's For

Any team building AI that needs to interact with the phone network.

AI Agent Developers

Autonomous agents with real phone numbers for SMS, voice, and automated verification testing.

Browser Automation Teams

Agents that navigate websites and need real phone numbers for automated testing and notifications.

AI Voice Agent Builders

Voice AI for inbound support or outbound calls with programmable numbers.

SaaS Platforms

Integrate phone capabilities into AI-powered products for your end users.

Pricing

Free tier for prototyping. Pro for production. No contracts.

FeatureFreePro
Monthly Price$0$19.99
Phone Numbers1 includedUnlimited (from $2/mo each)
SIM NumbersNot available1 included, +$8/mo each
SMS10/month$0.015/message
Voice Minutes5/month$0.035/minute
AI Voice CallsNot available$0.20/minute
Call RecordingNot available$0.01/minute
Code Extractions5/monthUnlimited
SupportEmailPriority email
ContractNoneNone

FAQ

What makes AgentCall different from traditional phone APIs?+
AgentCall is purpose-built for AI agents while traditional telecom APIs target human developers. AgentCall offers real SIM numbers that pass platform verification, automatic verification code extraction, AI voice calls, and per-agent isolation. Standard VoIP numbers are frequently blocked by major platforms.
Can I use AgentCall for free?+
Yes. The free tier includes 1 phone number, 10 SMS per month, 5 voice minutes, and 5 verification code extractions at no cost. No credit card required. Upgrade to Pro at $19.99/month for unlimited usage.
How fast can I provision a phone number?+
Phone numbers are provisioned in under 5 seconds via a single API call. Choose country, type (local, toll-free, mobile, SIM), and capabilities. The number is active immediately.
Do the numbers pass platform verification?+
Yes. SIM numbers pass strict verification from Stripe, Google, banks, and other platforms that block VoIP. Pro plan includes 1 SIM number; additional SIMs are $8/month each. Local numbers (from $2/month) and toll-free numbers ($2.50/month) work for less strict verification.
How does automatic code extraction work?+
When an SMS with a verification code arrives, AgentCall detects and extracts it automatically. The code is delivered to your webhook endpoint instantly alongside the full message.
What programming languages are supported?+
AgentCall provides a REST API with JSON responses — it works with any language that can make HTTP requests. Python, JavaScript, Go, Rust, Java, and more. Official SDKs for Python and Node.js.

Give your agent a phone number

Start free. No credit card required. Your agent gets a real phone number in under 60 seconds.

Get Started Free