Launch Ready cyber security Checklist for AI-built SaaS app: Ready for handover to a small team in marketplace products?.

What "ready" means for an AI-built SaaS app handed to a small team

For a marketplace SaaS, "ready" does not mean the app merely works on your laptop. It means a small team can take over without guessing where secrets live, how email sends, what breaks on deploy, or whether one bad request can expose customer data.

I would call it ready only if these are true:

• Domain points to the right environment with clean redirects.
• SSL is active everywhere, including subdomains.
• Cloudflare is in front of the app with caching and DDoS protection enabled.
• Production deploys are repeatable and documented.
• No secrets are hardcoded in code, logs, or frontend bundles.
• SPF, DKIM, and DMARC pass for outbound email.
• Uptime monitoring exists and alerts reach a real person.
• Basic auth, session, and access controls have been checked for bypasses.
• A small team can hand over support without breaking onboarding or billing.

If any of those are missing, the product is not handover-ready. It is still a prototype with launch risk.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | DNS setup | Root domain and subdomains resolve correctly in under 60 seconds after change | Users and emails must reach the right app | Broken login links, failed callbacks, lost traffic | | SSL everywhere | No mixed content, valid certs on all public hosts | Trust and browser security depend on it | Browser warnings, blocked assets, checkout drop-off | | Cloudflare in place | Proxy enabled with WAF or basic protection on public routes | Reduces attack surface and absorbs abuse | Bot traffic spikes, noisy attacks, downtime | | Secrets handling | Zero exposed API keys in repo, logs, or client bundle | Prevents account takeover and data leakage | Stolen keys, unauthorized billing, data exposure | | Email auth | SPF, DKIM, DMARC all pass | Marketplace ops depend on reliable email delivery | Spam folder placement, failed password resets | | Production deploy | One documented path from git to prod with rollback steps | Small teams need repeatability | Unsafe hotfixes, broken releases | | Monitoring | Uptime checks and alerting configured for app and critical endpoints | You need to know when users are blocked | Silent outages, support overload | | Auth checks | No critical auth bypasses or broken role checks found in core flows | Marketplaces have high-value user data | Unauthorized access to accounts or listings | | Redirects/subdomains | Old URLs redirect cleanly; admin/app/api hosts are mapped correctly | Preserves SEO and prevents confusion | 404s, duplicate content, login failures | | Handover docs | Team has checklist for domains, env vars, deploys, alerts, and ownership | Small teams need clear ownership fast | Tribal knowledge loss and repeated mistakes |

The Checks I Would Run First

1. Public exposure scan

• Signal: API keys in repo history, frontend env vars exposed to browser code, secrets in logs.
• Tool or method: Search the repo for `sk_`, `pk_`, `AIza`, `.env`, `process.env`, build output inspection, secret scanning with GitHub secret scanning or TruffleHog.
• Fix path: Move all private values server-side only. Rotate anything already exposed. Remove secrets from git history if needed.

2. Auth and role boundary check

• Signal: A normal user can reach admin routes or read another user's marketplace data by changing an ID.
• Tool or method: Manual test of key flows plus request replay in Postman or Burp Suite. Try ID swaps on orders, listings, messages, invoices.
• Fix path: Enforce authorization on the server for every sensitive action. Do not trust UI role hiding. Add tests for object-level access control.

3. Email deliverability check

• Signal: Password reset emails land in spam or fail entirely; domain auth records are missing or misaligned.
• Tool or method: MXToolbox or similar DNS checks plus test sends to Gmail and Outlook. Confirm SPF/DKIM/DMARC alignment.
• Fix path: Publish correct DNS records and verify sending domain ownership. If DMARC is missing today, add it before launch.

4. Deployment rollback check

• Signal: A failed deploy requires manual database edits or SSH fixes to recover.
• Tool or method: Review current deployment pipeline and run one safe production-like release with rollback notes.
• Fix path: Create a documented release process with versioned builds, env separation, and rollback commands.

5. Monitoring coverage check

• Signal: You only know about outages from users complaining.
• Tool or method: Set uptime checks on homepage, auth endpoint, checkout flow, webhook endpoint if relevant. Confirm alert delivery by email and Slack.
• Fix path: Add synthetic monitoring for critical paths. Track status page updates if you have external users.

6. Dependency risk check

• Signal: The app depends on outdated packages with known vulnerabilities or abandoned libraries.
• Tool or method: npm audit / pnpm audit / Dependabot review plus dependency diff against lockfile.
• Fix path: Upgrade high-risk packages first. Remove dead dependencies that increase attack surface.

Red Flags That Need a Senior Engineer

1. Secrets were committed at least once

• If a key hit git history or a public bundle even briefly, assume compromise until proven otherwise.

2. Auth is mostly enforced in the frontend

• If buttons disappear but API routes still accept requests without server-side checks, this is not safe enough for marketplace data.

3. The app has webhook-driven money flows

• Billing events without signature verification can create fraud risk and support chaos.

4. There is no staging environment

• Deploying directly to production makes every fix a launch gamble.

5. Nobody can explain the release path

• If the team cannot describe how code becomes live in less than 2 minutes of conversation, handover will fail.

DIY Fixes You Can Do Today

1. Rotate any exposed credentials now

• Start with payment keys, email provider keys, database URLs if they were shared anywhere outside your trusted backend.

2. Turn on Cloudflare proxying for public hosts

• Put the main domain behind Cloudflare before launch so you get basic edge protection and caching control.

3. Add SPF if you do nothing else today

• A minimal record is better than none while you prepare DKIM and DMARC:

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

• Replace providers with your actual mail service.

4. Create one simple uptime check

• Monitor `/` plus one authenticated endpoint like `/api/health` if available.
• Set alerts to at least two people so one missed message does not hide an outage.

5. Document your env vars in one place

• List each variable name, where it lives, who owns it, and whether it is production-only.
• This reduces launch delay when a small team takes over.

Where Cyprian Takes Over

• DNS broken or messy -> I fix root domain routing, redirects, subdomains setup

within hour 1 to 6.

• SSL issues -> I validate certificates across all public hosts within hour 1 to 8.
• Cloudflare missing -> I configure proxying,

caching, DDoS protection, and basic edge rules within hour 4 to 12.

• Email deliverability weak -> I set SPF/DKIM/DMARC,

verify sender alignment, and test inbox placement within hour 6 to 18.

• Secrets unsafe -> I move environment variables out of client exposure,

rotate sensitive values, and document secret ownership within hour 6 to 20.

• Deployment unclear -> I create a production deployment path,

confirm rollback steps, and hand off release notes within hour 12 to 30.

• No monitoring -> I set uptime monitoring,

alert routing, and basic incident response notes within hour 18 to 36.

• Handover missing -> I deliver a checklist that a small team can actually use within hour 36 to 48.

My recommendation is simple: if you cannot answer "where are our secrets," "how do we roll back," and "who gets paged when email fails," buy the service instead of trying to patch this ad hoc after launch.

For marketplace products specifically:

• downtime kills trust fast,
• broken email kills activation,
• weak auth creates support load,
• exposed secrets create legal and financial risk,
• unclear handover slows every future release.

The point of Launch Ready is not just deployment. It is reducing the chance that your first real customers become your first incident report.

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 ASVS overview: https://owasp.org/www-project-application-security-verification-standard/
• Cloudflare docs on SSL/TLS and security features: 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.*