Launch Ready cyber security Checklist for AI-built SaaS app: Ready for customer onboarding in bootstrapped SaaS?.

Launch Ready means the app can take real customers without creating security debt

For an AI-built SaaS app, "ready" does not mean "it works on my machine" or "the landing page looks good." It means a new user can sign up, verify email, log in, pay, and reach the first value moment without exposing secrets, breaking redirects, or triggering avoidable support tickets.

For bootstrapped SaaS, I would define ready as this: no exposed secrets, no critical auth bypasses, SPF/DKIM/DMARC passing, SSL enforced everywhere, production deploys repeatable in one click or one command, uptime monitored, and onboarding flows tested on mobile and desktop. If your app cannot survive a bad password reset attempt, a stale DNS record, or a bot hitting signup 200 times in 5 minutes, it is not launch ready.

If you want a simple self-assessment, ask these questions:

• Can a stranger create an account without seeing another user's data?
• Can I rotate secrets without redeploying the whole app manually?
• Does every domain and subdomain force HTTPS with valid SSL?
• Do emails land in inboxes instead of spam?
• Do I know within 5 minutes if signup breaks at 2 am?
• Can I onboard 10 customers tomorrow without guessing where the failure is?

If any answer is "I am not sure," you are still in build mode, not launch mode.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | DNS is correct | Root domain and subdomains resolve to the right targets with no stale records | Users must reach the app and email must authenticate | Broken onboarding links, failed verification emails | | SSL is enforced | HTTPS works on all domains and redirects from HTTP to HTTPS | Prevents credential theft and browser warnings | Login trust drops, mixed content errors | | Cloudflare is active | WAF/CDN/DDoS protection enabled with sane rules | Reduces bot abuse and downtime risk | Signup abuse, outages during traffic spikes | | Secrets are protected | No API keys in repo, logs, or frontend bundles; zero exposed secrets | Prevents account takeover and vendor abuse | Data leaks, billing fraud, incident response | | Email auth passes | SPF, DKIM, DMARC all pass for sending domain | Onboarding emails need inbox placement | Verification emails land in spam or fail | | Auth flow is locked down | No auth bypasses; protected routes require valid session/token | Core SaaS trust boundary | Unauthorized access to customer data | | Environment variables are separated | Dev/staging/prod values isolated and documented | Stops accidental production damage | Test data leaks into prod or vice versa | | Monitoring exists | Uptime checks plus error alerts for signup/login/payments | You need fast detection before users complain | Silent failures and support backlog | | Redirects are clean | One canonical domain path with no loops or chains > 1 hop | Preserves SEO and user trust | Broken login links and poor conversion | | Production deploy is repeatable | Deployment succeeds from clean branch with rollback plan | Bootstrapped teams cannot afford fragile releases | Long downtime and release anxiety |

The Checks I Would Run First

1. Domain and redirect integrity

Signal: root domain loads the app once, www redirects to canonical host once, subdomains resolve intentionally, and there are no redirect loops. I also check that onboarding links from email land on the correct page on mobile.

Tool or method: `dig`, browser dev tools network tab, Cloudflare dashboard, and a quick crawl of key URLs.

Fix path: remove stale DNS records, choose one canonical domain strategy, add single-hop redirects only, and make sure marketing pages and app routes do not fight each other. If your DNS has been changed by three different tools already, I would stop guessing and rebuild it cleanly.

2. SSL and mixed content

Signal: every public endpoint returns valid HTTPS with no browser warnings. No images, scripts, fonts, or API calls should load over HTTP.

Tool or method: browser console audit plus SSL Labs test.

Fix path: force HTTPS at Cloudflare or the edge server, replace hardcoded HTTP asset URLs with relative or HTTPS URLs, then retest login and onboarding pages. A single mixed-content script can break trust before a user even signs up.

3. Secret exposure review

Signal: no API keys in Git history, frontend bundles, logs, screenshots, issue trackers, or pasted code blocks. The threshold I use is zero exposed secrets.

Tool or method: secret scanning in repo history plus manual search for common key patterns like `sk_`, `pk_`, `AIza`, JWT signing keys, webhook secrets.

Fix path: rotate anything exposed immediately, move secrets into server-side environment variables or managed secret storage, then revoke old credentials after validation. If a secret ever shipped to the browser bundle in an AI-built app scaffolded fast by a tool like Lovable or Cursor output review missed it once already.

4. Authentication boundary check

Signal: unauthenticated users cannot access protected API routes or another customer's workspace by changing IDs in the URL. This includes org switching, billing pages, profile endpoints, invites, and file downloads.

Tool or method: manual testing with two accounts plus proxy inspection using Burp Suite Community Edition or browser dev tools.

Fix path: enforce authorization on every server route using session-aware checks tied to tenant ID. Do not rely on hidden UI buttons as security controls; that only protects against honest users.

5. Email deliverability setup

Signal: SPF passes for your sender domain; DKIM signs outgoing mail; DMARC passes with at least `p=none` during initial monitoring or stricter if you are already stable.

Tool or method: MXToolbox plus provider dashboards such as Resend, Postmark, SendGrid, Google Workspace admin settings.

Fix path: publish correct DNS records for SPF/DKIM/DMARC using one sender only where possible. For onboarding flows like verification links and password resets under bootstrapped SaaS pressure delivery failures become support load very quickly.

v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s

This example is useful because it gives you visibility first. Once reports are clean and aligned mail flow is stable you can tighten policy later.

6. Monitoring for signup failure paths

Signal: uptime checks exist for homepage login signup callback payment webhook health endpoints and error alerts fire within minutes. I want p95 API latency under 500ms for core onboarding endpoints unless your product has heavy processing by design.

Tool or method: UptimeRobot Better Stack Sentry PostHog logs plus basic synthetic checks from multiple regions.

Fix path: add health endpoints instrument error tracking tag critical events like signup_started signup_completed payment_succeeded email_verified. If you cannot see where onboarding fails you will learn from angry users instead of dashboards.

Red Flags That Need a Senior Engineer

1. You have production data but no clear environment separation between dev staging and prod. 2. Your auth uses client-side checks only or direct object IDs without server authorization. 3. Secrets have been shared across chat tools copied into frontend code or committed to Git. 4. Email verification sometimes works sometimes does not and nobody knows why. 5. You have Cloudflare DNS deployment hosting authentication emails analytics and webhooks spread across multiple owners with no rollback plan.

These are not "quick tweaks." They are failure modes that cause account takeover risk broken onboarding failed app review-style trust issues support burden and lost signups.

DIY Fixes You Can Do Today

1. Run a secret scan on your repo history now.

• Search for live keys webhooks private tokens JWT signing secrets.
• Rotate anything suspicious before you do another deploy.

2. Force HTTPS everywhere.

• Turn on automatic SSL in Cloudflare.
• Add canonical redirects so both `http` variants go to one secure URL only once.

3. Verify email authentication records.

• Check SPF DKIM DMARC with MXToolbox.
• Make sure your sender domain matches your website domain if possible.

4. Test onboarding with two fresh accounts.

• One should be owner admin.
• The other should be a normal user who must not see owner-only data even if they guess URLs.

5. Set up basic alerting today.

• Create uptime checks for homepage login signup payment callback.
• Add error alerts for auth failures webhook failures and elevated 500s.

Where Cyprian Takes Over

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

| Failure found | What I do in Launch Ready | |---|---| | DNS chaos across root www app api mail subdomains | Clean DNS setup redirects subdomains Cloudflare routing | | Mixed content SSL warnings expired certs insecure cookies | SSL enforcement secure headers production hardening | | Secrets visible in code history env files client bundle logs | Secret cleanup env variable audit rotation handover checklist | | Deliverability problems on verification/reset emails | SPF DKIM DMARC setup sender alignment testing | | Weak protection against bots abuse downtime spikes | Cloudflare caching DDoS protection WAF baseline rules | | Fragile deployment process no rollback plan | Production deployment verification rollback notes monitoring setup |

Delivery window is 48 hours because this work needs focus not meetings spread over two weeks.

My approach is:

• Hour 0 to 8: audit DNS email auth secrets deployment path
• Hour 8 to 24: fix edge security SSL redirects environment separation
• Hour 24 to 36: verify production deploy monitoring uptime alerts
• Hour 36 to 48: retest onboarding flows document handover validate customer-facing paths

If the product already has serious auth flaws broken tenancy isolation or payment logic bugs I will call that out fast because those sit outside a pure launch-and-deploy sprint unless they block safe onboarding directly.

References

• roadmap.sh code review best practices: https://roadmap.sh/code-review-best-practices
• roadmap.sh API security best practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh cyber security roadmap: https://roadmap.sh/cyber-security
• Cloudflare docs on DNS SSL WAF and DDoS protection: https://developers.cloudflare.com/
• OWASP ASVS application security verification standard: https://owasp.org/www-project-application-security-verification-standard/

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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.*