Launch Ready cyber security Checklist for AI-built SaaS app: Ready for paid acquisition in B2B service businesses?.

What "ready" means for Launch Ready

For an AI-built SaaS app selling into B2B service businesses, "ready for paid acquisition" means I can send paid traffic to the product without creating avoidable security, delivery, or trust failures.

That means four things are true at the same time:

• The domain resolves correctly, redirects are clean, and SSL is valid on every public entry point.
• Email is authenticated with SPF, DKIM, and DMARC so invoices, onboarding, and support mail do not land in spam.
• Secrets are not exposed in the repo, frontend bundle, logs, or deployment dashboard.
• Monitoring exists for uptime, certificate expiry, DNS drift, and basic error spikes before ad spend starts burning.

If any of those fail, paid acquisition does not just underperform. It creates support load, broken onboarding, lost leads, failed app reviews if there is a mobile wrapper, and wasted ad spend.

For this kind of product, I would call it ready when:

• Public pages load with no mixed content errors.
• LCP is under 2.5s on mobile for the landing page.
• No critical auth bypass or privilege escalation paths exist.
• Zero exposed secrets are detectable in code, build output, or browser source.
• SPF, DKIM, and DMARC all pass for the sending domain.
• Production deploys are repeatable and reversible.
• Uptime monitoring is active with alerts to a real inbox or Slack channel.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | Domain and DNS | Root domain and www resolve correctly with intended redirects | Trust and brand consistency | Broken links, duplicate indexing, lost traffic | | SSL everywhere | All public endpoints return valid HTTPS with no mixed content | User trust and browser safety | Browser warnings, blocked assets, conversion drop | | Email authentication | SPF, DKIM, and DMARC all pass | Deliverability for onboarding and billing | Spam folder delivery, missed replies | | Secrets hygiene | No secrets in repo, frontend bundle, logs, or CI output | Prevents account takeover and data leaks | Exposed API keys, billing abuse | | Auth controls | No auth bypasses; roles enforced server-side | Protects customer data and admin access | Unauthorized access and support incidents | | Input validation | Server validates all user input and file uploads | Stops injection and malformed requests | Data corruption or exploit paths | | Rate limits | Sensitive endpoints have rate limits and abuse controls | Reduces bot abuse and credential stuffing | Outages, cost spikes, lockouts | | Monitoring | Uptime checks plus error alerts are live | Detects failures before customers do | Silent downtime during ad spend | | Deployment safety | Production deploy is repeatable with rollback path | Lowers release risk during growth pushes | Broken releases with no recovery plan | | Caching/CDN setup | Static assets cached via Cloudflare correctly | Better speed during paid traffic bursts | Slow pages and higher bounce rate |

The Checks I Would Run First

1. Domain routing is clean

Signal: root domain, www subdomain, app subdomain, and any marketing pages resolve exactly once to the intended destination.

Tool or method: I test DNS records directly plus browser redirects from root to canonical URL. I also check for redirect chains longer than one hop.

Fix path: set one canonical host name per surface area. Use 301 redirects only where needed. If Cloudflare is in front of the app, make sure origin rules do not create loops.

2. SSL is valid on every public entry point

Signal: no certificate errors on the landing page, app login page, API docs if public, or custom subdomains.

Tool or method: browser inspection plus SSL Labs style validation. I also look for mixed content in DevTools because one insecure image or script can still damage trust.

Fix path: issue certs for all needed hosts through Cloudflare or your hosting provider. Force HTTPS at the edge. Replace any hardcoded http asset URLs.

3. Email authentication passes end to end

Signal: SPF passes on outbound mail; DKIM signs messages; DMARC policy exists with reporting enabled.

Tool or method: send test emails to Gmail and Outlook accounts plus inspect headers. Use MXToolbox or similar checks to confirm alignment.

Fix path: publish correct DNS records before launch. If you send through a provider like Resend or SendGrid, make sure the sending domain matches your From address.

A simple DMARC record often looks like this:

v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s

Do not copy that blindly into production without testing. If your email flow is already fragile, start with `p=none`, verify reports for a few days, then move up.

4. Secrets are not exposed anywhere public

Signal: no API keys in frontend code, no `.env` values committed to GitHub, no tokens in logs or build artifacts.

Tool or method: scan the repo history plus current codebase with secret detection tools. Then open the deployed site source map only if it exists and inspect bundles for accidental string leakage.

Fix path: move all secrets to environment variables on the server side only. Rotate anything that may have been exposed even once. Treat leaked keys as compromised until proven otherwise.

5. Authz is enforced server-side

Signal: a normal user cannot access another tenant's data by changing IDs in URLs or requests.

Tool or method: I test direct object access by editing request parameters in devtools or Postman. I also verify admin-only routes reject non-admin sessions even if hidden from UI.

Fix path: enforce ownership checks on every sensitive query. Never rely on frontend hiding buttons as security control. Add tests around tenant isolation before spending on ads.

6. Monitoring catches failures before customers do

Signal: uptime checks exist for homepage/login/API health endpoints plus alerts go somewhere real within minutes.

Tool or method: use UptimeRobot-like checks plus log-based alerts from your hosting platform or APM tool. I verify alert delivery by forcing a test failure window.

Fix path: monitor at least three things on day one:

• homepage availability
• login flow availability
• error spikes on production routes

If you cannot see failures within 5 minutes of occurrence, you are flying blind while paying for clicks.

Red Flags That Need a Senior Engineer

1. You found any exposed secret in Git history or production source. That means rotation work is required immediately because the blast radius may already include third-party services and customer data.

2. Your app has tenant data but no clear authorization layer. This is how B2B SaaS apps leak client records across accounts after one rushed AI-generated feature merge.

3. Email deliverability is inconsistent across Gmail and Outlook. Paid acquisition depends on follow-up sequences working reliably. If onboarding emails fail now, sales ops will suffer later too.

4. Deployments are manual and scary. If every release feels like a gamble with no rollback plan, you will delay fixes when ad spend exposes bugs faster than you can patch them.

5. You cannot explain where logs go. No logs means no incident response trail when something breaks after launch traffic starts hitting edge cases at scale.

DIY Fixes You Can Do Today

1. Check your public domains in an incognito browser. Verify that root domain redirects once to your canonical URL and that there are no certificate warnings.

2. Search your repo for secrets right now. Look for `.env`, API keys prefixed with common patterns like `sk_`, `pk_`, `AIza`, `xoxb`, or private tokens committed by mistake.

3. Test your email headers. Send a signup email to Gmail and inspect whether SPF/DKIM/DMARC pass in message details.

4. Turn on basic uptime monitoring. Set checks for homepage and login every 1 minute with alerts to email plus Slack if possible.

5. Remove public access to anything experimental. Delete staging links indexed by Google if they should not be public. Lock down admin panels behind auth instead of obscurity.

Where Cyprian Takes Over

When these checks fail together - especially DNS drift plus missing email auth plus secret exposure risk - this stops being a quick founder fix and becomes production hardening work.

Here is how I would map it:

| Failure area | Launch Ready deliverable | Timeline | |---|---|---| | Domain routing issues | DNS cleanup, redirects, subdomains setup | Hours 1 to 6 | | SSL problems / mixed content | Cloudflare config + HTTPS enforcement + caching rules | Hours 1 to 8 | | Email delivery failures | SPF/DKIM/DMARC setup + sender alignment verification | Hours 4 to 12 | | Secret exposure risk | Environment variable migration + secret audit + rotation checklist | Hours 6 to 18 | | Weak deployment process | Production deployment + handover checklist + rollback notes | Hours 12 to 24 | | Missing monitoring | Uptime monitoring + alert routing + health endpoint review | Hours 18 to 30 | | Launch handoff gaps | Final verification list + owner notes + next-step actions | Hours 30 to 48 |

My recommendation: do not spend paid traffic until these items pass together:

• zero exposed secrets
• SPF/DKIM/DMARC passing
• HTTPS everywhere
• monitoring active
• deployment reproducible

domain, email, Cloudflare, SSL, deployment, secrets, monitoring, and handover documentation so you can launch without guessing what broke later.

References

• roadmap.sh - Cyber Security Best Practices: https://roadmap.sh/cyber-security
• roadmap.sh - API Security Best Practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh - Code Review Best Practices: https://roadmap.sh/code-review-best-practices
• OWASP Top 10: https://owasp.org/www-project-top-ten/
• Google Search Central - HTTPS requirements: https://developers.google.com/search/docs/fundamentals/https-requirements

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Take the next step

If this is a problem in your product right now, here is what to do next:

• [Use the free Cyprian tools](/tools) - estimate cost, score app risk, check launch readiness, or pick the right service sprint.

• [Book a discovery call](/contact) - I will tell you honestly whether you need a sprint or if you can DIY the next step.

*Written by Cyprian Tinashe Aarons - senior full-stack and AI engineer helping founders rescue, launch, automate, and scale AI-built products.*