Phone Service for AI Agents
Give AI Agent a Phone Number
Provision phone numbers for AI agents with APIs for SMS, Voice Calls, and Real Time Streaming.
Built for
Trusted by Industry Leaders
Why Spenza
Built Different, Built for AI
- Real phone numbers with Guaranteed deliverability
- Global phone number provisioning
- Programmable SMS and voice APIs
- Can be used as a data eSIM
- Seamless number porting support
- Numbers assigned by physical address
countries
coverage
Uptime
Guaranteed SLA
latency
Average response
numbers
Provisioned
agents need phone numbers
AI agents are taking on customer support, scheduling, and sales, but they still can't connect effectively with the world's largest communication network - the traditional phone system, which remains crucial.
Spenza solves virtual phone numbers for AI agents, complete with voice and SMS APIs.
Everything your AI needs
Three APIs, infinite possibilities for AI communication.
AI phone Numbers
Effortlessly set up local or international phone numbers for your AI agents with our platform, covering 40+ countries.
SMS API
Send and receive SMS messages programmatically with two-way messaging, delivery receipts, and webhook support.
real-time voice streams
Receive live audio streams from calls using SIP or WebRTC. Feed directly to your LLM for real-time AI processing.
Integration
Three Steps to AI-Powered Calling
Go from zero to AI-powered phone calls in minutes, not months.
01
Provision a Number
POST /api/v1/purchase-esim
Get a virtual phone number via a single API call. Choose from US, UK, EU and 40+ countries.
02
connect your AI
POST /api/v1/webhook/register
Configure your webhook or SIP endpoint to receive call and sms events in real time.
03
Your AI Talks to Humans
Inbound----Stream----Respond
Inbound calls trigger live audio streams via SIP or WebRTC, enabling your AI agent to respond.
Use Cases
Build for Agentic AI
Purpose-built for the next generation of AI-powered communication.
Customer support
Sales outreach
voice assistants
identity verification
global operations
Give Your AI Agent a Phone Number
Start building voice and messaging into your AI agents today.