---
title: SMS
description: Send SMS messages using the internal SMS service
---

import { BlockInfoCard } from "@/components/ui/block-info-card"

<BlockInfoCard 
  type="sms"
  color="#E0E0E0"
  icon={true}
  iconSvg={`<svg className="block-icon"
    
    fill='#000000'
    
    
    viewBox='0 0 32 32'
    xmlns='http://www.w3.org/2000/svg'
  >
    <path d='M 2 5 L 2 25 L 7 25 L 7 30.09375 L 8.625 28.78125 L 13.34375 25 L 30 25 L 30 5 Z M 4 7 L 28 7 L 28 23 L 12.65625 23 L 12.375 23.21875 L 9 25.90625 L 9 23 L 4 23 Z M 8 12 L 8 14 L 24 14 L 24 12 Z M 8 16 L 8 18 L 20 18 L 20 16 Z' />
  </svg>`}
/>

{/* MANUAL-CONTENT-START:intro */}
The SMS block allows you to send text messages directly from your workflows using Sim's own SMS sending infrastructure powered by Twilio. This integration enables you to programmatically deliver notifications, alerts, and other important information to users' mobile devices without requiring any external configuration or OAuth.

Our internal SMS service is designed for reliability and ease of use, making it ideal for automating communications and ensuring your messages reach recipients efficiently.
{/* MANUAL-CONTENT-END */}


## Usage Instructions

Send SMS messages directly using the internal SMS service powered by Twilio. No external configuration or OAuth required. Perfect for sending notifications, alerts, or general purpose text messages from your workflows. Requires valid phone numbers with country codes.



## Tools

### `sms_send`

Send an SMS message using the internal SMS service powered by Twilio

#### Input

| Parameter | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `to` | string | Yes | Recipient phone number \(include country code, e.g., +1234567890\) |
| `body` | string | Yes | SMS message content |

#### Output

| Parameter | Type | Description |
| --------- | ---- | ----------- |
| `success` | boolean | Whether the SMS was sent successfully |
| `to` | string | Recipient phone number |
| `body` | string | SMS message content |



## Notes

- Category: `tools`
- Type: `sms`
