Domain Monitor SaaS Product

A peek into the Domain Monitor SaaS product that we'll be building in this series with Rails, Stripe, Solid Queue, and Kamal.

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4m

Checking Domain Expirations With RDAP

Nov 24, 2025 Pro

RDAP is a protocol we can use to check the expiration of domains. This will be the foundation of the SaaS product we're building.

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5m

Rails new with TailwindCSS

Nov 26, 2025 Pro

To start, let's create our Rails app for our domain monitoring SaaS. We'll also setup TailwindCSS so that we can design the UI as we build it.

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18m

Authentication Generator and Registration

Nov 28, 2025 Pro

Next, we need users, sign up, and authentication so we'll use the Rails authentication generator.

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8m

Adding the Domains model

Dec 01, 2025 Pro

Next, we need to track domains and associate them with users in the database.

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15m

Syncing Domain Expiration

Dec 03, 2025 Pro

Now that users can manage domains, let's integrate our key feature: syncing domain expiration with RDAP.

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27m

Subscriptions with Pay and Stripe

Dec 05, 2025 Pro

Let's lock down domain expiration syncing behind a paywall. Users will need to subscribe with Stripe and we'll use the Pay gem to implement this.

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8m

Improving Onboarding By Registering With A Domain

Dec 08, 2025 Pro

Thinking through our onboarding process, it would be great to ask a user to enter a domain and store it automatically on registration.

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6m

Syncing Domains In The Background With Solid Queue

Dec 10, 2025 Pro

Syncing domains can take time, so we can improve our UI experience by offloading this work into the background.

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9m

Realtime Domain Updates with Turbo Refreshes & Morph

Dec 12, 2025 Pro

Let's improve background jobs by updating the UI using Turbo Stream refreshes using morphing.

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10m

Adding UI Labels For Domain Statuses

Dec 15, 2025 Pro

We can improve the visual look of domain statuses by using some color and badges to make available and expiring soon domains stand out more.

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9m

Sorting Domains

Dec 17, 2025 Pro

For users with many domains, sorting is going to be a really useful feature. Let's add links to the table column headers for sorting by name, expiration or last checked at.

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8m

Email Notifications For Domain Expirations

Dec 19, 2025 Pro

Emails will be a critical feature to notify users when domains expire and become available for purchase. Let's add these using ActiveRecord callbacks.

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12m

Testing The Domain Model

Dec 22, 2025 Pro

Let's write some tests to ensure that our logic is correct for the Domain model.

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9m

Emails for domains that are expiring soon require a bit of a different approach since we can't rely on ActiveRecord callbacks. Instead, we'll use a recurring task (like a cron job) to check on them and notify users.

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21m

Deploying The Domain Monitor App To Production With Kamal

Dec 26, 2025 Pro

We've built the core functionality, so it's time to get this app into production. We'll spin up a server and use Kamal to build a Docker image and deploy to production.

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8m

Monitoring Domain Syncing with Mission Control Jobs

Dec 29, 2025 Pro

We'll want to monitor production for any issues, so let's add Mission Control Jobs to keep an eye on Solid Queue.

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25m

Adding Madmin For Customer Support And Monitoring

Dec 31, 2025 Pro

As a product, we'll need to help customers and fix issues in production. To do this, we'll add the Madmin gem to give us an admin area.

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9m

Adding WHOIS Fallback For Domain Lookup

Jan 02, 2026 Pro

RDAP isn't used by every TLD yet, so we can add a WHOIS fallback to handle those cases.

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12m

Sending Emails In Production With Mailpace

Jan 05, 2026 Pro

Let's walk through setting up emails in production along with fixing a couple other small bugs.

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13m

Recurring Domain Expiration Syncing

Jan 07, 2026 Pro

Something we haven't added yet is a recurring task for syncing all the domains in the database. Changes won't happen often but we want to know when a domain is registered or extended shortly after it happens.

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