Base44 is a platform for building apps with AI. You can add Resend in a Base44 project by asking the chat to add email sending with Resend.
This integration requires backend functions, a feature available only on Builder tier and above. Learn more about Base44 pricing.

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1. Add the Resend integration in Base44

If starting a new app:
  1. Click Integration in the top nav.
  2. Search for Resend, select it, and choose Use This Integration.
Resend Integration page If adding Resend to an existing app:
  1. Enable backend functions.
  2. Ask the chat: “Add the Resend email integration to my app. Prompt me to provide the API key and send a welcome email to new users.”
See the Base44 documenation for more information.

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2. Add your Resend API key

However you add Resend to your project, you’ll need to add a Resend API key, which you can create in the Resend Dashboard. Do not share your API key with others or expose it in the browser or other client-side code. Copy the API key and paste it into the RESEND_API_KEY field in Base44. Adding your Resend API key to Base44

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3. Add a custom domain to your Resend account

By default, you can only send emails to your own email address. To send emails to other email addresses:
  1. Add a custom domain to your Resend account.
  2. Add the custom domain to the from field in the resend function in the Base44 backend function (or ask the chat to update these fields).
Get more help adding a custom domain in Resend’s documentation.