Launched ExpiryPing — SSL expiry alerts built in 3 weeks at 30 min/day

I'm a software developer based in Canada, working full-time with school-age kids. I had 20-30 minutes per day to build something.

Three weeks ago, I started ExpiryPing — SSL certificate expiry monitoring that sends email alerts at 30, 14, 7, and 1 day before certificates expire.

The constraints I set:

• 20-30 minutes per day, weekdays only

• No cold outreach (I'm introverted)

• No social media presence

• Passive acquisition only

What I built:

• 6 free developer tools (SSL checker, JWT decoder, PEM decoder, TLS checker, Cron validator, JSON formatter) as SEO acquisition

• Each tool links to the paid monitoring product

• Daily cron job checks all monitored domains

• Email alerts via Resend

• Stripe billing ($19 Starter, $39 Pro)

The funnel: Google → free tool → result → "monitor this automatically" → dashboard → subscription

Current status:

• Live at expiryping.dev

• Accepting real payments

• Open for business, looking for first customers

What's next:

• Watch Search Console for organic traffic

• Weekly summary emails (just shipped)

• Domain expiry monitoring

Happy to answer questions about the tech stack or the build process.