Skip to content
SIP trunk for AI agents

Give your
ChatGPT a phone

Your AI agents make real phone calls. Collections, reminders, sales, support. One click to install. Just talk.

Start free How it works
# Just say it. Claude makes the call.
 
"Call John and collect the $247.50 overdue payment"
 
✓ Collector agent activated
✓ Calling +1 (415) 555-1234...
✓ Connected. Duration: 2m 14s
{"status":"completed","call_id":"7f3a8b2c","credits":10}
 
# Or use the CLI:
$ pip install aitrunk && aitrunk call --agent collector
Ready-made agents

4 agents. Zero setup.

Pre-configured on SipPulse AI. Just provide the number and context.

Receptionist

Verifies identity and transfers to the real destination.

--agent receptionist

Collector

Informs about overdue payments and negotiates agreements.

--agent collector

Sales

Pitches the product, qualifies interest, schedules follow-up.

--agent sales

Reminder

Reminds about appointments, due dates, or scheduled events.

--agent reminder
How it works

3 steps. 30 seconds.

Add the plugin. Get an API key. Talk.

01

Add the plugin

One click from the Claude MCP marketplace, ChatGPT GPT Store, or pip install aitrunk

02

Get your API key

Create a free account. Your key connects your AI to a real phone line.

03

Talk

"Call John and collect the payment." Your AI handles the rest.

Pricing

Credit system. Simple.

Each call type uses credits per minute. More intelligence, more credits.

Scenario
Legs
Credits/min
Phone → SIP address (SipPulse AI, OpenAI, Retell, VAPI, others)
1 PSTN
1
Phone → Phone (bridge two phones)
2 PSTN
2
Phone → TTS (AI-generated voice message)
1 PSTN + TTS
3
Phone → AI Agent (receptionist, collector, sales, reminder)
1 PSTN + Agent
5
Starter
$49 /mo
For developers and small operations.
  • 1 phone number included (caller-ID)
  • 200 credits/month
  • 4 built-in agents
  • CLI + MCP
  • Detailed CDR
Get started
Growth
$99 /mo
For teams that need more volume.
  • 1 phone number included (caller-ID)
  • 800 credits/month
  • Built-in + custom agents
  • Custom SIP address (OpenAI, Retell, VAPI...)
  • Premium TTS voices
Start free
Pro
$249 /mo
For professional operations and agencies.
  • 1 phone number included (caller-ID)
  • 3,000 credits/month
  • Everything in Growth
  • Priority support
  • Event webhooks
Get started

Unused credits do not roll over. Extra credits available through the portal.

Integration

Set up in 1 minute.

CLI, MCP on Claude, or ChatGPT. Choose how your agents make calls.

Claude Code

Install the CLI and use it directly in your terminal.
# Install
$ pip install aitrunk
$ aitrunk configure
 
# Use in Claude Code
"Call John and collect the payment"
# Claude runs:
$ aitrunk call ...

Claude Desktop (MCP)

Add to claude_desktop_config.json:
{ "mcpServers": { "aitrunk": { "command": "aitrunk", "args": ["mcp"] } } }
Then just say: "Call John and remind him about the meeting."

ChatGPT (Actions)

Import the API as an Action in your GPT:
1. Create a custom GPT 2. Go to Configure → Actions 3. Import the schema: https://api.aitrunk.io/openapi.json 4. Add your API key 5. Done! Ask by text or voice: "Call +14155551234 and remind about the appointment at 2pm"
Works with voice on the ChatGPT mobile app.

Claude Mobile (Voice)

New
Talk to Claude on your phone. It makes the call for you.
IN
"Call John and tell him his $247 invoice is due tomorrow"
OUT
Call initiated to John.
Collector agent activated with context: $247.00
Claude app for iOS and Android. Configure MCP once, use voice always.

ChatGPT Mobile (Voice)

Talk to ChatGPT on your phone. Same result.
IN
"Remind Sarah about her appointment tomorrow at two"
OUT
Call initiated to Sarah.
Reminder agent activated: appointment 04/05 2pm
Set up the GPT with Actions once. Use voice on mobile app.
Compatible with everything

Connect any voice platform.

Configure a custom SIP address and use AITRUNK as a universal SIP trunk for any voice AI provider.

SipPulse AI
Built-in agents included
[email protected]
Retell AI
Your Retell SIP address
[email protected]
VAPI
Your VAPI SIP address
[email protected]
OpenAI Realtime
GPT Realtime with native SIP
[email protected]
Bland AI
Outbound AI calls
[email protected]
Any SIP address
Your own agent
aitrunk configure --sip
///

AI-powered anti-fraud protection

All calls are monitored and verified by artificial intelligence against fraud, spam, and misuse. Accounts that violate our terms of service will be suspended immediately. AITRUNK operates in compliance with local telecommunications regulations and consumer protection laws.

Your AI deserves
a phone.

Start with $10 in free credits. No card required.

Create free account