Launch Ready cyber security Checklist for AI-built SaaS app: Ready for first 100 users in creator platforms?.

Launch Ready cyber security Checklist for AI-built SaaS app: Ready for first 100 users in creator platforms?

"Ready" for a creator-platform SaaS app is not "the app runs on my laptop." It means a stranger can sign up, verify email, log in, use the core workflow, and trust the product with their data without you creating a support fire.

For the first 100 users, I would define ready as this: no exposed secrets, no broken auth flows, no open admin routes, SPF/DKIM/DMARC passing, HTTPS everywhere, Cloudflare in front of the app, uptime monitoring active, and the main user journey working on mobile. If any of those fail, you are not launch ready. You are one bug report away from losing trust, wasting ad spend, or getting locked out of your own stack.

For AI-built SaaS apps in creator platforms, the risk is usually not "advanced hacking." It is weak defaults from rapid builds: public env vars, permissive CORS, broken redirects, missing rate limits, bad email setup, and tools that expose internal data through prompts or logs. That is exactly what I check before I let a founder put paid traffic or creators' audiences into the product.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | HTTPS and SSL | All domains and subdomains force HTTPS with valid certs | Prevents credential theft and browser warnings | Users see "not secure", login failures | | DNS hygiene | Correct A/CNAME records, no stale records, no dangling subdomains | Stops traffic leaks and takeover risk | Email bounce, broken app routes | | Email authentication | SPF, DKIM, DMARC all pass | Improves deliverability and stops spoofing | Password reset emails land in spam | | Secrets handling | Zero secrets in codebase or client bundle | Prevents credential exposure and abuse | Database/API compromise | | Auth checks | No auth bypasses on private routes or APIs | Protects user accounts and paid data | Data leaks and account takeover | | Rate limiting | Login, signup, reset password limited by IP/user/email | Reduces brute force and abuse | Spam signups and credential stuffing | | CORS policy | Only allowed origins can call private APIs | Stops cross-site data exposure | Third-party sites read your data | | Logging hygiene | No passwords, tokens, or PII in logs | Limits blast radius after incidents | Support sees sensitive user data | | Monitoring | Uptime alerts + error alerts + basic tracing active | Cuts time to detect outages from hours to minutes | You find out from users first | | Backup/recovery plan | Restore path tested at least once | Protects against deployment or data loss mistakes | Long outage or irreversible loss |

The Checks I Would Run First

1. Public surface scan

• Signal: I look for exposed admin paths, test endpoints, staging domains, open Swagger docs, and accidental public buckets.
• Tool or method: Browser crawl plus `robots.txt`, sitemap review, Cloudflare DNS review, and a quick route inventory from the deployed app.
• Fix path: Remove unused routes from production, lock down admin paths behind auth plus role checks, delete stale DNS records, and move any internal docs behind access control.

2. Secrets exposure check

• Signal: Any API key visible in frontend code, build output, repo history, logs, or environment files.
• Tool or method: Secret scanning in GitHub/GitLab plus manual grep for `.env`, `NEXT_PUBLIC_`, `VITE_`, `SUPABASE_KEY`, `OPENAI_API_KEY`, Stripe keys, webhook secrets.
• Fix path: Rotate exposed keys immediately. Move server-only secrets out of client bundles and enforce environment separation between dev/staging/prod.

3. Auth flow validation

• Signal: Signup works only once per user; login requires verified identity; reset password cannot be abused; private pages reject anonymous access.
• Tool or method: Test accounts plus browser devtools plus API requests with invalid tokens.
• Fix path: Add server-side authorization checks on every protected endpoint. Do not trust frontend route guards. If a request can hit the database without checking ownership or role first, it is not safe.

4. Email domain authentication

• Signal: SPF includes the right sender(s), DKIM signs outgoing mail, DMARC is set to at least quarantine with reporting enabled.
• Tool or method: MXToolbox or your email provider's diagnostics.
• Fix path: Publish correct DNS records before launch. If creator-platform onboarding depends on email verification or password resets but delivery is weak, your activation rate will drop fast.

5. Rate limit and abuse control

• Signal: Repeated login attempts slow down or block after a small threshold; signup forms do not accept unlimited bot traffic.
• Tool or method: Manual repeated requests with curl/Postman plus provider logs.
• Fix path: Add IP-based and account-based throttles on auth endpoints. For first 100 users I want conservative limits like 5 failed logins per 15 minutes per account/IP pair.

6. Monitoring and incident visibility

• Signal: You get an alert when uptime drops or error rate spikes; you can see who changed what before the failure.
• Tool or method: Uptime monitor plus application error tracking plus deployment logs.
• Fix path: Add alerts for downtime and 5xx spikes before launch. Without this you will lose hours diagnosing problems that should take 5 minutes to spot.

Red Flags That Need a Senior Engineer

1. You found secrets in the repo history

• This is not a cleanup task for a founder with a weekend.
• Once keys are exposed publicly or shipped into builds, I assume rotation across every dependent service.

2. Private data loads through client-side calls only

• If the browser can fetch another user's records by changing an ID in the URL or request body, you have an authorization problem.
• That is how creator dashboards leak subscriber lists.

3. The app uses multiple AI tools but no guardrails

• If prompts can be manipulated to reveal hidden instructions or internal data sources, you need red teaming before launch.
• For AI-built SaaS this often shows up as prompt injection through user-generated content.

4. Email deliverability is already poor

• If verification emails take too long or land in spam now with zero traffic pressure, first-user activation will suffer immediately.
• Creator platforms depend on fast onboarding loops.

5. Deployment changes feel risky

• If every deploy needs manual fixes because env vars differ between local/staging/prod or migrations break production data shapes,

you need someone to stabilize release flow before paid users arrive.

DIY Fixes You Can Do Today

1. Rotate anything that might have leaked

• Revoke old API keys you pasted into chat tools or shared repos.
• Create new keys only after confirming which services actually need them.

2. Turn on Cloudflare immediately

• Put DNS behind Cloudflare proxy where possible.
• Enable SSL/TLS full strict mode after confirming your origin certificate is valid.

3. Add basic email authentication

• Publish SPF now.
• Enable DKIM signing through your email provider.
• Set DMARC to `p=quarantine` once sending works cleanly.

4. Remove public access to internal pages

• Hide staging URLs from search engines.
• Delete test routes like `/admin-test`, `/debug`, `/seed`, `/preview`.
• Make sure private routes redirect unauthenticated users to login instead of rendering partial data.

5. Check your app from an incognito window on mobile

• Sign up as if you were a first-time user.
• Verify that onboarding works without console errors,

broken buttons, missing emails, or dead-end screens.

A simple DMARC starter record looks like this:

_dmarc.example.com TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc@example.com"

Where Cyprian Takes Over

If your checklist has gaps across domain setup, email deliverability, production deployment, or secret handling, I would not patch those piecemeal over several weeks.

• 48 hours
• Domain setup
• Email authentication
• Cloudflare configuration
• SSL enforcement
• Redirects and subdomains
• Production deployment
• Environment variables audit
• Secrets cleanup
• Uptime monitoring
• Handover checklist

My rule is simple:

• If there are exposed secrets -> I rotate them and harden secret storage first.
• If auth is weak -> I fix route protection and API authorization next.
• If email fails -> I repair SPF/DKIM/DMARC before you invite users.
• If deployment is unstable -> I lock down release steps so you can ship without breaking production.

For first 100 users in creator platforms, I care more about reducing support load than adding features. A clean launch here means fewer failed signups, fewer refund requests, fewer "I never got my email" complaints, and less chance of losing trust before product-market fit has even started.

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
• OWASP Top 10: https://owasp.org/www-project-top-ten/
• Cloudflare SSL/TLS documentation: https://developers.cloudflare.com/ssl/

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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.*