SIM-as-a-service for AI agents
Give your agents real-world voice, SMS, and data. The connectivity infrastructure for agentic systems that need to call, text, and connect.
In production at







AI agents need phone numbers, not just LLMs
Agentic systems are starting to do real work in the real world. They book appointments, verify identities, run support calls, and interact with services that only accept phone calls and SMS. None of that works without telecom infrastructure.
Spinning up a SIM, a phone number, or an SMS-capable endpoint for an agent is currently a telecom procurement project. By the time you finish, the agent's use case has evolved twice.
You need cellular and telephony that can be provisioned at agent speed.
How Firsty solves it
Sub-second provisioning
Spin up a number or eSIM in the time it takes the agent to need it.
One API for voice, SMS, and data
No glue code across three providers.
Programmatic lifecycle
Provision, use, deprovision. Pay only for active time.
Per-agent identity
Each agent gets its own number, its own SIM, its own audit trail.
Technical capabilities
- Programmatic number provisioning
- Programmatic SIM provisioning
- Voice AI integration
- SMS send and receive
- Webhook events for agent loops
- Ephemeral allocation
- Audit logs per agent
- API-first everything
Firsty vs traditional telecom for AI
| Firsty | Traditional voice API | Hand-rolled | |
|---|---|---|---|
| Sub-second provisioning | ✓ | minutes to hours | hours to days |
| Voice + SMS + data in one API | ✓ | -(separate products) | - |
| Multi-MNO routing | ✓ | - | - |
| Self-serve sandbox | ✓ | varies | n/a |
| Per-agent audit trail | ✓ | partial | build yourself |
From sandbox to production
- 01
Request early access
Tell us about your agent use case.
- 02
Build against sandbox
Provision a number per agent.
- 03
Test voice and SMS flows
Run end-to-end agent loops.
- 04
Launch with early access
Move to production when general availability opens.
Frequently asked questions
Keep exploring
Telecom that moves at agent speed.
Request early access to the AI agent platform.