# Email & SMS

Communications

Send transactional emails, SMS notifications, marketing campaigns

Enable your AI agents to communicate directly with users via email and SMS. Send transactional alerts, notifications, and marketing messages with templates, scheduling, and delivery tracking.

### Details

**Auth Type**  
API Key (Bearer token)

**Rate Limit**  
10000 emails/hour, 1000 SMS/minute

**Pricing**  
Email: $0.001 per message, SMS: $0.0075 per message

### Try It

**Step 1:** Save your provider key  
This is **NOT** your Callio key. Enter the API key from the provider's dashboard (e.g. OpenAI/SendGrid).

Save Provider Key

## Getting Started

1. **Try It Instantly**  
Click "Try It" above to test the API in the playground

2. **Add to Your Agent**  
Click "Add to Agent" to get your API key and integrate

## Common Use Cases

- Send verification codes
- Transaction notifications
- Alert users to important events
- Schedule bulk campaigns
- Track delivery and engagement

## 💻 Code Examples

Get started quickly with these code examples in your favorite language

### cURL

```bash
curl -X GET \
  'https://www.callio.dev/api/proxy/email-sms/forward?target=https%3A%2F%2Fjsonplaceholder.typicode.com%2Fendpoint' \
  -H 'Authorization: Bearer YOUR_CALLIO_KEY' \
  -H 'Content-Type: application/json'
```

💡 **Tip:** Replace `YOUR_CALLIO_KEY` with your actual Callio API key from the dashboard.