The best API to send transactional emails. Optimized for speed, reliability, and builder experience. Stop worrying about spam folders.
// Using fetch API
const sendEmail = async () => {
const response = await fetch('https://tapi.simplysend.email/post', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'X-Api-Key': 'your_api_key',
'X-Id': 'your_account_id'
},
body: JSON.stringify({
to: 'recipient@example.com',
from: 'sender@yourdomain.com',
subject: 'Hello from Simply Send',
html: '<html><body><h1>Hello!</h1><p>Sent via API.</p><footer>{{report_abuse_email_html}}</footer></body></html>',
text: 'Hello! This is a test email sent via the API.',
replyTo: 'support@mydomain.com',
})
});
const data = await response.json();
console.log('Email sent:', data);
};Our infrastructure handles millions of emails per month. We've optimized every millisecond of the delivery pipeline.
Emails are routed through the nearest edge location for minimum latency.
Battle-tested infrastructure that scales with your business needs.
Track every event from 'sent' to 'opened' with <100ms latency.
Not ready to migrate to a REST API? Our high-performance SMTP relay allows you to swap your existing provider in minutes. Just update your server address and you're live.
const nodemailer = require('nodemailer');
const transporter = nodemailer.createTransport({
host: "smtp.simplysend.domain.com",
port: 587,
secure: true,
auth: {
user: "your_account_id",
pass: "your_api_key",
},
});
const sendSmtpEmail = async () => {
const info = await transporter.sendMail({
from: '"Sender" <hello@simplysend.dev>',
to: "bob@simplysend.email",
subject: "Hello via SMTP",
text: "Sent via Simply Send SMTP Relay.",
html: "<b>Sent via Simply Send SMTP Relay.</b>",
});
console.log("Message sent: %s", info.messageId);
};Simply Send works seamlessly with all your favorite tools and platforms.


Stop guessing what happened to your emails. Track every delivery, open, and click with surgical precision through our real-time event stream.
Start sending emails for free. No credit card required. Up to 1,000 emails/month on the free tier.