Callio
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📧

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
Full Docs
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).

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 -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.

Ready to integrate Email & SMS?

Test endpoints live or generate your API key and start building in minutes

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