Vapi 为语音智能体新增 SMS 短信能力

Vapicon 2026 is coming

We’re excited to announce that Vapi now supports SMS.

AI agents are no longer locked into a single modality.

Your voice agents can now send and receive text messages - out of the box.

Voice is powerful, but real-world conversations often need more: A confirmation code. A link to a reservation. Directions to a location. A quick follow-up without needing to stay on the line.

Vapi SMS makes that seamless.

What’s New

Your agents can now:

Send outbound SMS messages during a call; Receive and respond to incoming SMS messages live, even while on a call; Switch from voice to text mid-conversation when the user stops speaking and starts typing; Support fully text-based flows for cases where voice doesn’t make sense

It’s a big step toward making Vapi agents feel truly multimodal and more aligned with how people actually communicate.

How to Use It

Create a Twilio number; If you're based in the US, register for A2P 10DLC or verify a toll-free number on Twilio to enable SMS messaging; Inside the Vapi dashboard, use "Import Phone Number", and enter your Twilio SID, token, and number; Go to the Vapi Dashboard → Tools → Create Tools → Send Text; Update your assistant’s tools to include the send text tool; Include the tool’s name in your system prompt; You're done. Your Vapi agents can now read and write SMS in the same session as voice

Check Docs for full setup instructions and examples.

Why We Built This

We wanted to make your voice AI agents more versatile, responsive, and usable across more real-world environments like healthcare clinics, delivery fleets, and retail floors.

This SMS layer adds fault tolerance and flexibility to your existing flows, and unlocks new ones, like:

Confirm appointments silently: “Reply YES to confirm”; Collect structured input during a call: “Text the serial number”; Recover from dropped calls or poor audio via fallback SMS; Operate entirely over text in low-connectivity or high-noise environments

This feature is all about coverage, continuity, and control to let users stay in flow, no matter where or how they’re communicating.

What’s coming next

This is just the beginning.

We’re actively working on supporting more providers and deeper SMS tooling - including rich media (MMS), automatic message templates, and multi-channel conversation history across voice and text.

For now, Twilio gets you everything you need to build and test.

Great conversations aren’t limited to one format.

Let’s build something real together

Registering a phone number with Twilio

Filing A2P 10DLC with Twilio

Obtaining and verifying a US & Canada toll-free phone number

Leverage the SMS tool via the Vapi api

Table of Contents

GPT-Live is now in beta for every Vapi customer

Have your personal assistant make the call you keep putting off

Vapi for CX: own every layer, improve every week

Fast decisions alongside voice AI: early experiments with Jev

Campaigns, rebuilt: scale outbound calling with Vapi

Vapi simulations: test for every type of caller

Introducing Vapi Model Intelligence: model recommendations backed by production data

Introducing Vapi Monitoring

Vibe code voice agents

Your Voice Agents Need Tests. Now They Have Them.

Structured Outputs: Extract validated data from voice AI calls

Introducing Squads: Teams of Assistants

Real-time STT vs. Offline STT: Key Differences Explained

Introducing Vapi Workflows

Make your voice agents also chat with Vapi’s new Chat API

What Is ACD? An Introduction to Automatic Call Distribution

Tacotron 2 for Developers

Vapi x LiveKit Turn Detection

5 Days, 5 Features: Sneak Peek into the Future of Vapi

Introducing Vapi Voices

Vapi x Cartesia: Ultra-Realistic Voice AI with Sonic 2.0