Launch Ready cyber security Checklist for AI-built SaaS app: Ready for launch in marketplace products?.

Launch Ready cyber security Checklist for AI-built SaaS app: Ready for launch in marketplace products?

"Ready" for an AI-built SaaS app is not "the UI works on my laptop." For a marketplace launch, ready means a stranger can sign up, pay, receive emails, use the product, and not expose your data or your customers data in the process.

If I were auditing this for launch, I would want four things true before release: no exposed secrets, no critical auth bypasses, email deliverability passing SPF/DKIM/DMARC, and production monitoring in place. If any one of those is missing, you do not have a launch-ready product yet. You have a demo that can break, leak data, or get blocked by the marketplace review team.

For founders shipping AI-built SaaS apps into marketplace products, cyber security is not a separate workstream. It is part of launch readiness because one bad config can mean failed app review, broken onboarding, support tickets on day one, or customer data exposure.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | | --- | --- | --- | --- | | Domain and DNS | Root domain and key subdomains resolve correctly | Users and marketplace reviewers must reach the right app | Broken login links, wrong environment exposure | | HTTPS and SSL | All traffic redirects to HTTPS with valid certs | Protects sessions and login flows | Browser warnings, blocked checkout | | Cloudflare protection | WAF/CDN enabled with sane rules | Reduces attack surface and absorbs abuse | Bot traffic spikes, DDoS risk | | Secrets handling | Zero secrets in repo or client bundle | Prevents credential theft | Database compromise, API abuse | | Auth checks | No critical auth bypasses or IDOR paths found | Stops unauthorized access between tenants/users | Data leaks across accounts | | Email authentication | SPF, DKIM, DMARC all pass | Improves deliverability and trust | Emails land in spam or get rejected | | Environment separation | Dev/staging/prod isolated cleanly | Prevents accidental production damage | Test data leaks into live app | | Monitoring alerts | Uptime and error alerts active within 5 minutes | Lets you detect failures before customers do | Silent outages and lost revenue | | Caching setup | Static assets cached safely; no private data cached publicly | Improves speed without leaking content | Slow pages or cached sensitive data | | Deployment rollback | Revert path tested once before launch | Limits blast radius of bad deploys | Long outage after a broken release |

A practical pass threshold I use: zero exposed secrets, SPF/DKIM/DMARC passing at 100%, no critical auth issues found in smoke testing, and p95 API latency under 500ms for core flows. If you cannot hit those numbers yet, do not call it launch ready.

The Checks I Would Run First

1) DNS points to the right place

Signal: your root domain loads the correct app, www redirects properly, and subdomains like api., app., and admin. resolve only where intended. I also check for stale A records and old preview URLs still live in public DNS.

Tool or method: `dig`, browser checks, Cloudflare DNS panel review, and a quick certificate inspection after propagation. I also verify redirect behavior from root to canonical domain so you do not split SEO or confuse users.

Fix path: remove unused records, set canonical redirects once at the edge or load balancer level, and document which subdomain maps to which environment. If you are launching in a marketplace product context, I will make sure every public URL matches the reviewer flow exactly.

2) SSL is valid everywhere

Signal: every public endpoint returns HTTPS with no mixed content warnings. I look for expired certs, HTTP endpoints still open on port 80 without redirect rules, and assets loaded from insecure third-party URLs.

Tool or method: browser devtools console, SSL Labs test, and direct curl checks against root plus key subdomains. I also inspect whether your deployment platform auto-renews certificates or if you are depending on manual steps.

Fix path: force HTTP to HTTPS at Cloudflare or the edge proxy, replace insecure asset URLs with HTTPS versions, and confirm renewals are automatic. A broken cert during launch can kill conversion instantly because users will not trust an app that looks unsafe.

3) Secrets are not exposed

Signal: no API keys in Git history, frontend bundles, logs, `.env` files committed by mistake, or AI-generated code that prints credentials. This is one of the most common failure modes in AI-built apps because code generators often create "temporary" shortcuts that never get removed.

Tool or method: secret scanning with GitHub secret scanning or `gitleaks`, plus a manual search through build artifacts and server logs. I also inspect client-side code for any variable that should only exist server-side.

Fix path: rotate anything exposed immediately, move secrets into environment variables or a secret manager, and remove them from history if needed. If a payment key or database password has been exposed even once in public logs or commits, treat it as compromised.

4) Authentication cannot be bypassed

Signal: one user cannot read another user's records by changing an ID in the URL or request body. In AI-built SaaS apps this often shows up as broken row-level authorization because the prototype only checked "is logged in" instead of "is this their record."

Tool or method: manual testing with two accounts plus simple request replay using browser devtools or Postman. I also check admin routes separately because many launches fail when admin-only pages are left accessible by mistake.

Fix path: enforce authorization on every sensitive endpoint server-side using tenant IDs and ownership checks. Do not rely on frontend hiding buttons; that is UI convenience only. For marketplace products handling customer data across workspaces or teams, this is non-negotiable.

5) Email deliverability passes SPF/DKIM/DMARC

Signal: transactional emails arrive consistently in inboxes instead of spam folders. The exact threshold I want before launch is SPF pass + DKIM pass + DMARC aligned pass on your sending domain.

Tool or method: send test emails through Gmail and Outlook accounts plus mailbox validator tools like MXToolbox. I verify DNS records directly because many founders paste them incorrectly into Cloudflare during setup.

Fix path: publish correct SPF include records for your sender provider only once per domain; add DKIM keys; set DMARC policy first to `p=none` while monitoring reports before tightening later. Here is a minimal example of what "correct enough" usually looks like:

v=spf1 include:_spf.google.com include:sendgrid.net ~all

Do not copy that blindly if you are using different providers. The point is to keep SPF narrow enough to avoid spoofing while matching your actual mail stack.

6) Monitoring catches failures fast

Signal: uptime checks are live for homepage login flow plus one core API route; error alerts trigger within five minutes; logs show request IDs so failures can be traced quickly. If an outage happens after launch and nobody knows until customers complain hours later, your support load goes up immediately.

Tool or method: UptimeRobot-style checks for public routes plus application monitoring like Sentry or Logtail/Datadog depending on stack size. I verify alert routing to email or Slack before handover so you know it works when something breaks.

Fix path: add health endpoints that reflect real service health rather than just "server is running," then wire alerts to actionable channels only. Do not send every warning to five people; that creates alert fatigue and delays response when something serious happens.

Red Flags That Need a Senior Engineer

1) You have multiple environments but no clear separation between dev staging and prod. That usually means test data can leak into production workflows or vice versa. It also makes rollback dangerous because nobody knows which database belongs to which deployment.

2) Your AI-generated code includes broad admin privileges "for now." That shortcut often becomes permanent tech debt and creates direct privilege escalation risk. If an assistant generated it once without guardrails, it may be exposing more than intended right now.

3) Your app uses third-party APIs but stores their keys in frontend code. That is an immediate credential leak waiting to happen. Any user can inspect browser source and reuse those keys outside your app.

4) Marketplace review already failed once due to login issues. That usually signals deeper problems than just copy changes. I would inspect auth flow stability, session persistence, callback URLs, CSRF protection, and email verification before resubmitting.

5) You cannot explain where logs go when something fails. If there is no observability story， debugging becomes guesswork during launch week. That means slower fixes， more downtime， more support tickets， and higher chance of shipping another broken release.

DIY Fixes You Can Do Today

1) Rotate any secret you pasted into chat tools， notes， Git commits， or screenshots. Assume anything shared outside your secret manager is compromised until proven otherwise.

2) Turn on Cloudflare proxying for public web traffic. This gives you basic CDN caching， TLS termination， bot filtering， and some DDoS protection without changing your product logic.

3) Add forced HTTPS redirects. Make sure both `http://` root domain requests redirect cleanly to `https://` without loops or mixed content warnings.

4) Test signup， password reset， invite flows， and billing emails from two separate inboxes. You want to catch deliverability problems before users do it for you through support tickets.

5) Create one simple uptime check for homepage plus one authenticated route. If either fails twice in a row， you should know within minutes instead of discovering it from angry users later。

Where Cyprian Takes Over

Here is how I map common failures to Launch Ready deliverables:

| Failure found | What I do in Launch Ready | Timeline | | --- | --- | --- | | DNS misroutes or stale records | Fix DNS entries， set canonical redirects， validate subdomains | Day 1 | | Broken SSL / mixed content / HTTP access open | Enforce HTTPS， install/renew certs， remove insecure assets | Day 1 | | Secret leakage risk | Audit env vars， rotate leaked keys， move secrets out of repo/build output/logs | Day 1-2 | | Weak auth boundaries / IDOR risk at launch scope | Review critical routes， patch ownership checks， retest core flows manually | Day 2 | | Email spam/rejection issues | Configure SPF/DKIM/DMARC properly， test inbox placement , validate sender reputation basics | Day 1-2 | | No monitoring / silent failures possible | Add uptime monitoring , error alerts , logging handover checklist | Day 2 |

My recommendation is straightforward: if your app already has users waiting or paid traffic about to land on it, buy the sprint instead of trying to piece this together over weekends.

The business case is simple。 One missed auth bug、one leaked secret、or one failed email setup can cost more than the entire sprint in lost signups、support time、and damaged trust。 My job here is not just to make it "work" but to make sure it survives first contact with real users。

References

• roadmap.sh - API Security Best Practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh - Cyber Security Roadmap: https://roadmap.sh/cyber-security
• OWASP Top Ten: https://owasp.org/www-project-top-ten/
• Cloudflare SSL/TLS documentation: https://developers.cloudflare.com/ssl/
• Google Workspace SPF DKIM DMARC guide: https://support.google.com/a/answer/174124?hl=en

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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.*