To successfully integrate Clerk authentication in your Next.js application hosted on Netlify, ensure that your environment variables are correctly configured. The following steps outline the necessary setup:

  1. Set Environment Variables: In your Netlify dashboard, navigate to Site settings > Build & deploy > Environment > Environment variables. Add the following variable:

    • NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY: Your Clerk publishable key from the Clerk dashboard.

    Optionally, you can also add:

    • CLERK_PUBLISHABLE_KEY: This is not required for Next.js but can be included for other potential integrations.

  2. Verify Key Usage: Ensure that your application code is correctly referencing the NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY. This variable should be automatically scoped by Clerk's SDK, so you may not need to explicitly use it in your code. However, if you encounter issues, double-check that the variable is being accessed correctly.

  3. Deploy and Test: After setting the environment variables, redeploy your application on Netlify. Visit your site to confirm that the authentication flow works without errors. If you still see the error regarding the missing publishable key, revisit the environment variable settings to ensure they are correctly configured.