Built for scale
Every feature is designed with enterprise reliability and developer experience in mind.
<50ms
API Latency
10K/s
Throughput
99.99%
Uptime
99.7%
Retry Success
Email API
Send transactional emails with guaranteed inbox delivery. Our infrastructure handles reputation management, IP warming, and provider optimization automatically.
- SMTP and REST API endpoints
- DKIM, SPF, DMARC auto-configuration
- Bounce, complaint, and unsubscribe handling
- Attachment support up to 25MB
- Batch sending (up to 1,000 recipients)
- Delivery webhooks with retry logic
const transmitly = require('transmitly')('your-api-key');
await transmitly.emails.send({
to: 'user@example.com',
template: 'welcome-v2',
data: { name: 'Alice' }
});SMS Gateway
Reach customers globally via 150+ carrier networks with automatic failover. Optimized for OTP, alerts, and transactional messages.
- Global coverage in 150+ countries
- Alphanumeric sender ID support
- Two-way SMS capabilities
- Concatenated message handling
- Delivery receipts and status callbacks
- Number validation and formatting
const transmitly = require('transmitly')('your-api-key');
await transmitly.sms.send({
to: '+14155552671',
template: 'otp',
data: { code: '384729' }
});Webhook Management
Configure, monitor, and retry webhooks with intelligent backoff strategies. Real-time event streaming with guaranteed at-least-once delivery.
- At-least-once delivery guarantee
- Exponential backoff with jitter
- HMAC signature verification
- Event filtering and routing
- Dead letter queue for failed events
- Webhook testing sandbox
// Verify webhook signature
const isValid = transmitly.webhooks.verify(
payload,
signature,
secret
);
// Register endpoint
await transmitly.webhooks.create({
url: 'https://api.example.com/webhooks',
events: ['email.delivered', 'email.bounced']
});