Custom Domains & Lead Magnets

First, open your terminal:

Navigate to your project folder, then run:

claude --dangerously-skip-permissions

Edit the prompt below directly — replace the text in brackets with your own details. When you are done, hit Copy and paste it into Claude Code.

1. Go to supabase.com/dashboard and click New Project
2. Give it a name like your business name or “my-leads”
3. Set a password and save it somewhere
4. Pick the region closest to you
5. Click “Create new project” and wait about one minute

When Claude sets up your database tables and security rules, it often uses the Supabase CLI behind the scenes to run SQL. The CLI needs a Personal Access Token — a separate account-level key that lets Claude authenticate and execute commands against your project.

1. Go to supabase.com/dashboard/account/tokens (or click your avatar at the top right → Account → Access Tokens)
2. Click Generate new token
3. Name it something like “claude-workshop”
4. Copy the token immediately — you cannot view it again after closing the modal
5. Go to Claude Code and paste this:

1. In your Supabase project, click the gear icon and go to Settings > API Keys
2. Click Create new API Keys
3. Copy your Project URL (looks like https://abcdef.supabase.co)
4. Copy the Publishable key (starts with sb_publishable_)
5. Copy the Secret key (labeled Service Role or Secret — you will need this in the next step)
6. Go to Claude Code in your terminal and paste this with your values filled in:

By default, anyone who finds your Supabase URL can read or delete your entire subscriber list. Row Level Security fixes that — the website can only add new subscribers, and nothing else is exposed. Your server needs one extra key to keep duplicate checking working.

Enable Row Level Security on my Supabase subscribers table.

Allow anyone to submit a new row through the form, but block all reading, editing, and deleting from the public. Use my service role key server-side so duplicate checking still works. Add the service role key to my .env.local and to my Vercel environment variables.

Show me confirmation that RLS is on and the policy is active.

1. Go to resend.com and sign in (create a free account if you have not yet)
2. Click API Keys in the left sidebar
3. Click Create API Key, give it a name like “lead-magnet”, and click Create
4. Copy the key immediately, then go back to Claude Code and paste this:

Now that Claude has your Supabase credentials, tell it to set up everything your lead magnet form needs to work on the server side:

Set up the backend for my lead magnet form using my Supabase credentials.

1. Create a database table to store my email subscribers. It should save their first name, email, which lead magnet they signed up for, and the date.
2. The same person should be able to sign up for different lead magnets and get each email.
3. The same person should not be able to sign up for the same lead magnet twice.
4. Make sure my website is allowed to save data to the table.
5. Set up the server side so that when someone submits their name and email through the lead magnet form, it saves them to the database.
6. Make sure both fields are filled in before saving anything.
7. Return a success message when it works and an error message when it does not.

Claude can add your environment variables to Vercel directly:

Add my Supabase and Resend environment variables to my Vercel project.

Deploy my website to production.

1. Once deployed, visit your live site on your custom domain
2. Submit the form with a real email address
3. Confirm: a new row appears in the Supabase Table Editor and an email lands in your inbox