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Resend Email API

Resend Email API provides a scalable and reliable platform for developers to send transactional and marketing emails through a RESTful interface, featuring modern SDKs and extensive documentation.

Developed by Resend

View Source
99.90%Uptime
150msLatency
5.1kStars
API KeyAuth
NoCredit Card
RESTStyle
v1Version
API Endpoints

Reference for available routes, request structures, and live examples.

Sends transactional emails with templating support

Full Endpoint URL
https://api.resend.com/emails
Implementation Example
curl -X POST 'https://api.resend.com/emails' \
  -H 'Authorization: Bearer YOUR_API_KEY'
Request Payload
{
  "to": "[email protected]",
  "from": "[email protected]",
  "html": "<strong>Hello!</strong>",
  "subject": "Welcome to Our Service"
}
Expected Response
{
  "id": "abc123def456",
  "to": "[email protected]",
  "from": "[email protected]",
  "created_at": "2023-07-18T15:30:00Z"
}
Version:v1
Limit:100 emails/hour
Real-World Applications
  • Password reset emailsOptimized Capability
  • Welcome and onboarding sequencesOptimized Capability
  • Receipt and invoice deliveryOptimized Capability
  • Scheduled marketing campaignsOptimized Capability
  • User invitation workflowsOptimized Capability
Advantages
  • ✓ Developer-first REST API
  • ✓ Multi-language SDK support
  • ✓ Strong observability with logs & webhooks
  • ✓ High deliverability and domain authentication
Limitations
  • ✗ Free tier limited to basic usage
  • ✗ Template features in private beta
  • ✗ No visual email designer included
  • ✗ Rate limits apply to free tier

FAQs

API Specifications

v1
Pricing Model
Freemium with tiered monthly subscription (Free, Pro, Scale, Enterprise)
Credit Card
Not Required
Response Formats
JSON
Supported Languages
12 Languages
SDK Support
Node.js, Python, Ruby, Go, Java, .NET, PHP, Elixir, Rust
Time to Hello World

Less than 10 minutes to start sending

Rate Limit

600 requests/minute per API key

Free Tier Usage

Free plan includes 3,000 emails per month, single domain, 1-day log retention, ticket support

Use Case: Best For

Developers building transactional email features and scaling with ease

Not Recommended For

Teams needing advanced marketing campaign builders or high-contact marketing automation

Resources

Documentation Official Website Source Code Pricing Details Postman Collection
#transactional#email

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