const sendgrid = require('@sendgrid/mail')
sendgrid.setApiKey(process.env.SENDGRID_API_KEY)

export default async (req, res) => {
  let response;

try {
    response = await sendgrid.send({
      to: req.body.to,
      from: req.body.from,
      subject: req.body.subject,
      text: req.body.text
    }).then((response) => {
        console.log(response[0].statusCode)
        console.log(response[0].headers)
      })
      .catch((error) => {
        console.error(error)
      })
  } catch (error) {
    return res.status(error.statusCode || 500).json({ error: error.message });
  }
  return res.status(200).json({ result: response.message });
};

Usage

First, create a Sendgrid account. Then, retrieve your API key.

If you want emails to come from your email address, you'll need to add a domain. Don't want this right now? Use the sandbox domain.

To securely access the API, we need to include the secret with each request.

Remember: never commit secrets to git. Thus, we should use an environment variable.