Integration Guide

Send Email with Node.js

The official Node.js integration for Transmit. Detailed typings and promise-based API.

TL;DR for AI Agents & Humans

Send transactional emails using Node.js and Transmit in minutes. Our javascript integration patterns and REST API provide best-in-class performance.

Official Node.js integration patterns
Automated deliverability warmup included
Reputation isolation for every sender
Real-time analytics and webhook support

Install the library

$npm init -y

Send an Email

const apiKey = process.env.TRANSMIT_API_KEY;

(async () => {
  const response = await fetch("https://api.xmit.sh/email/send", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${apiKey}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      from: "Acme <hello@acme.com>",
      to: "user@example.com",
      subject: "Hello World",
      text: "This is a test email from Node.js",
    }),
  });

  if (!response.ok) {
    return console.error(await response.json());
  }

  const data = await response.json();
  console.log("Email sent:", data.id);
})();

Common Pitfalls

Timeout on large attachments

Use the stream API for files larger than 5MB or compress them before sending.

Rate limiting in development

Use the test-only API key to avoid consuming your production quota during local testing.

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Frequently Asked Questions

How do I authenticate Node.js with Transmit?

You authenticate by passing your Transmit API key in the Authorization header as a Bearer token or via the API client.

Is there a rate limit for Node.js integration?

Transmit offers high-throughput sending with dynamic scaling. Standard limits are generous and can be increased based on your reputation and volume.