AI Builder Guides

Bolt.new

Add email sending with MailBlastr to a Bolt.new project using a .env-stored API key.

Bolt.new is a platform for building full-stack web and mobile apps via chat. You can add MailBlastr to a Bolt.new project by asking the chat to add email sending with MailBlastr.

1. Add your MailBlastr API key

Create a MailBlastr API key in the dashboard. To store it safely, use a .env file — you may need to include that instruction in your prompt to Bolt.new. In Node.js projects, tell Bolt to install the official mailblastr SDK (npm install mailblastr) and call mb.emails.send(...) server-side. In other runtimes, Bolt can send via a plain POST to https://api.mailblastr.com/emails with Authorization: Bearer $MAILBLASTR_API_KEY.

Do not share your API key or expose it in the browser or other client-side code. Read it from process.env on the server.

Example prompt

Add email sending with MailBlastr. Store the API key in a .env file as
MAILBLASTR_API_KEY. When the form is submitted, send an email server-side by
POSTing to https://api.mailblastr.com/emails with an Authorization: Bearer header.

2. Add a custom domain

By default you can only send email to your own address. To send to other recipients, add and verify a custom domain, then update the from field in the send code to use an address on that domain (or ask the chat to update it).