Launch Ready API security Checklist for founder landing page: Ready for security review in bootstrapped SaaS?.

Launch Ready API security Checklist for founder landing page: Ready for security review in bootstrapped SaaS?

"Ready" for a founder landing page is not "it works on my laptop." It means a security reviewer can load the site, inspect the deployment, and find no obvious way to expose secrets, hijack email, break DNS, or abuse your API surface.

For a bootstrapped SaaS, I would call it ready only if these are true: zero exposed secrets in the repo or browser bundle, HTTPS everywhere, Cloudflare is in front of the domain, SPF/DKIM/DMARC are passing, auth and admin routes are protected, rate limits exist on any public API, and monitoring will tell you within minutes if something breaks. If any one of those fails, your risk is not theoretical. It becomes launch delay, failed customer trust checks, support noise, or worse, data exposure.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | 1. Domain and DNS | Apex and www resolve correctly with no stale records | Prevents hijacks and broken routing | Traffic goes to old host or attacker-controlled target | | 2. HTTPS and SSL | All pages force HTTPS with valid certs | Protects logins and forms in transit | Browser warnings, dropped conversions | | 3. Cloudflare in front | Proxy enabled with WAF/DDoS protection | Adds edge filtering and hides origin IP | Origin gets scanned directly | | 4. Secrets handling | No secrets in repo, build output, or client JS | Stops credential theft | API keys get burned fast | | 5. Email authentication | SPF, DKIM, DMARC all pass | Improves deliverability and anti-spoofing | Signup emails land in spam or get spoofed | | 6. Redirects and subdomains | Old URLs redirect cleanly; subdomains are intentional | Avoids phishing-like confusion and duplicate content | Broken links and trust issues | | 7. Public API controls | Auth required where needed; rate limits on public endpoints | Blocks abuse and scraping | Bot traffic drains quota or leaks data | | 8. Input validation | Server rejects bad payloads with clear errors | Prevents injection and malformed requests | Security bugs and noisy support tickets | | 9. Monitoring/alerts | Uptime monitoring plus error alerts active | Shortens time to detect outages | You find out from customers first | | 10. Handover checklist | Accesses documented; rollback path known | Reduces lock-in and recovery time | Deployment failure becomes a fire drill |

A practical threshold I use: no critical auth bypasses, zero exposed secrets, SPF/DKIM/DMARC passing, and p95 API latency under 500ms for the landing page backend if it has one.

The Checks I Would Run First

1. DNS and origin exposure

• Signal: The apex domain, www, and any marketing subdomains point exactly where they should.
• Tool or method: `dig`, Cloudflare DNS panel, certificate transparency lookup.
• Fix path: Remove stale A records, move DNS behind Cloudflare proxy mode, confirm the origin IP is not publicly advertised unless it must be.

2. TLS and redirect chain

• Signal: One clean redirect from `http://` to `https://`, then to the canonical host.
• Tool or method: Browser dev tools, `curl -I`, SSL Labs test.
• Fix path: Set a single canonical host rule at Cloudflare or your app server. Remove redirect loops and mixed-content assets.

3. Secrets in code and client bundle

• Signal: No API keys, webhook secrets, private tokens, or service credentials appear in Git history or shipped JavaScript.
• Tool or method: Repo scan with `git grep`, secret scanning tool like TruffleHog or GitHub secret scanning.
• Fix path: Rotate leaked keys immediately. Move all secrets to server-side environment variables only.

4. API auth boundary

• Signal: Protected endpoints return 401 or 403 when called without valid auth.
• Tool or method: Postman/curl against every route that touches user data.
• Fix path: Enforce auth middleware on the server side only. Do not rely on hidden frontend routes as "security."

5. Rate limiting and abuse control

• Signal: Repeated requests from one IP/user get throttled before they create cost or spam.
• Tool or method: Manual burst test plus logs.
• Fix path: Add per-IP/per-account rate limits to signup, contact forms, password reset, OTP requests, and public APIs.

6. Email authentication stack

• Signal: SPF passes for your sender domain; DKIM signs outbound mail; DMARC policy exists.
• Tool or method: MXToolbox or Google Admin Toolbox checkers.
• Fix path:

```txt v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s ``` Start with quarantine if you are unsure about all senders. Move to reject after validation.

Red Flags That Need a Senior Engineer

1. You have hardcoded keys in Lovable, Cursor output, Webflow embeds, or frontend env files that reached the browser. 2. Your login flow uses client-side checks only, with no server-side authorization enforcement. 3. You do not know which services send email on your behalf. 4. Your domain has multiple DNS providers or old app hosts still resolving somewhere on the internet. 5. You need Cloudflare rules, deployment rollback logic, secrets rotation, monitoring alerts, and handover documented before launch day.

These are not "quick fixes" when you are bootstrapped and already under pressure from ads or investors. They turn into downtime support load, failed security review notes, broken onboarding emails, and expensive rework.

DIY Fixes You Can Do Today

1. Run a secret sweep now

• Search your repo for `sk_`, `pk_`, `api_key`, `secret`, `token`, `password`.
• Delete anything sensitive from frontend code immediately.
• Rotate any key that may have been exposed.

2. Lock down your canonical domain

• Pick one version of the site: usually `https://www.yourdomain.com` or apex.
• Redirect everything else there with a single rule set.
• Remove duplicate hosts that confuse users and search engines.

3. Turn on basic Cloudflare protections

• Enable proxy mode for the main domain.
• Turn on DDoS protection defaults.
• Add a simple WAF rule for obvious bot patterns if your stack supports it.

4. Check email reputation basics

• Verify SPF includes every real sender only once.
• Confirm DKIM signing is active in your provider.
• Publish DMARC at least at `quarantine`.

5. Test your forms like an attacker

• Submit empty fields,
• submit oversized text,
• submit script tags,
• submit repeated requests quickly,
• confirm the server rejects bad input without leaking stack traces.

If you can do these five today without breaking production access rights or email delivery chains then you are ahead of most early-stage founders.

Where Cyprian Takes Over

This is where I stop guessing and make it production-safe fast.

• DNS cleanup + redirects + subdomains -> covered in Launch Ready's domain setup work.
• Cloudflare proxy + SSL + caching + DDoS protection -> covered in the deployment hardening pass.
• SPF/DKIM/DMARC -> covered in email deliverability setup so transactional mail does not fail review later.
• Environment variables + secrets -> covered by moving credentials out of client code and into proper production config.
• Uptime monitoring -> covered by adding alerting so outages do not wait until customers complain.
• Production deployment + handover checklist -> covered by the final release step so you know what was changed and how to recover it.

My goal is not to redesign your whole product architecture unless I find a blocker that would cause launch failure.

If I find exposed secrets plus weak auth plus missing monitoring in one pass then I recommend buying Launch Ready instead of piecing together random fixes over several weekends. That combination usually means more hidden breakage than founders expect.

What "Security Review Ready" Looks Like In Practice

A reviewer should be able to verify these outcomes quickly:

• Domain resolves cleanly through Cloudflare
• HTTPS is enforced everywhere
• No critical secrets appear in source code or browser bundles
• Login-required routes fail closed
• Public endpoints have rate limits
• Email authentication passes
• Monitoring is active
• Deployment steps are documented
• Rollback is possible without tribal knowledge

I also want basic performance sanity because slow systems often hide risky hacks later:

• Landing page LCP under 2.5 seconds on mobile
• No major CLS issues from late-loading banners
• Backend p95 response under 500ms for simple requests
• Error rate below 1 percent during normal traffic

If you cannot meet those numbers yet then you are not ready for paid traffic either.

When To Buy Launch Ready Instead Of DIY

Buy it when:

• you need this fixed in 48 hours,
• you already found one leak but suspect more,
• you are about to run ads,
• a partner wants a security review before integration,
• you cannot afford one failed launch cycle.

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 10: https://owasp.org/www-project-top-ten/
• Cloudflare SSL/TLS documentation: https://developers.cloudflare.com/ssl/
• Google Workspace email sender guidelines: https://support.google.com/a/answer/33786

---

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.*