Send route in Express.js

Add a POST route in Express.js that sends emails with the Publiq SDK, with error handling.

Instantiate the client once and reuse it across requests:

import express from 'express';
import { Publiq, PubliqError } from 'publiq';

const app = express();
app.use(express.json());
const publiq = new Publiq(process.env.PUBLIQ_API_KEY);

app.post('/send', async (req, res) => {
  try {
    const email = await publiq.emails.send({
      from: 'you@yourdomain.com',
      to: req.body.to,
      templateKey: 'welcome-email',
    });
    res.json({ id: email.id });
  } catch (err) {
    if (err instanceof PubliqError) return res.status(err.status).json({ error: err.code });
    res.status(500).json({ error: 'internal' });
  }
});

app.listen(3000);

Best practices

Always call Publiq from the server — never expose the API key on the client.
Create the client instance once and reuse it across requests.
Prefer templateKey over inline HTML to keep content versioned.
Handle PubliqError (status/code); the SDK already retries transient errors with backoff.
Send from a verified domain — see Domains.