# BeaverCheck Audit Report — https://mayoclinic.org

**Date:** April 16, 2026  
**URL:** https://mayoclinic.org  
**Overall Grade:** C (74/100)  
**Report:** https://beavercheck.com/results/39f3018e-72cc-4823-bb1f-3511ebee8871

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** HSTS header is missing — Security > Security Headers
3. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
4. **[CRITICAL]** 1 button(s) with no accessible text — Accessibility > Link & Button Quality
5. **[WARNING]** 104 third-party resources (100% of weight) — Performance > Page Weight Inventory

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 34 |
| Accessibility | 100 |
| Best Practices | 81 |
| SEO | 92 |

---

## Security

### Security Headers (F — 10/100)

*2 of 10 headers properly configured*

- **[CRITICAL]** HSTS header is missing — Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 1 year.
- **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
- **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN.
- **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
- **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
- **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
- **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.
- **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
- **[PASS]** X-Powered-By header is not present
- **[PASS]** Server header is present without version info

### Content Security Policy (F — 0/100)

*No enforcing CSP policy found*

- **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

### TLS & Certificates (A+ — 100/100)

*TLS 1.2, 7 checks passed*

- **[PASS]** TLS 1.2 is used
- **[INFO]** TLS 1.3 is not negotiated — TLS 1.3 offers improved performance and security. Consider enabling it.
- **[PASS]** Strong cipher suite is used
- **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance.
- **[PASS]** Certificate is valid (expires in 308 days)
- **[PASS]** Certificate chain has 4 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 24 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A+ — 100/100)

*No cookies set — no cookie security risks*

- **[PASS]** No cookies set — no cookie security risks

---

## Advanced Security

### Subresource Integrity (F — 20/100)

*0 of 18 external resources have SRI*

- **[WARNING]** External script from nexus.ensighten.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from nexus.ensighten.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from nexus.ensighten.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from www.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from www.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from transcend-cdn.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from s.go-mpulse.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from xih9lsprjt.kameleoon.io lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tagdelivery.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.mayoclinic.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from nexus.ensighten.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.

### JS Library Vulnerabilities (A+ — 100/100)

*No known vulnerabilities*

- **[PASS]** No known JavaScript library vulnerabilities detected

### Information Leakage (A+ — 100/100)

*No exposures*

- **[INFO]** No security.txt found — Consider adding a security.txt at /.well-known/security.txt.
- **[PASS]** No sensitive files exposed

### Email Security (D — 50/100)

*DMARC: none*

- **[WARNING]** DMARC policy is none — monitoring only — This only monitors, it doesn't block spoofed emails. Change to p=quarantine or p=reject.

### Permissions-Policy (D — 40/100)

*No header set*

- **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

### CORS Configuration (B — 80/100)

*No CORS headers*

- **[PASS]** No CORS headers present — secure default

---

## Performance

### Page Weight Budget (C — 60/100)

*1.9 MB transferred, 105 requests*

- **[INFO]** Page weighs 8.8 MB (1.9 MB transferred)
- **[WARNING]** JavaScript is 1018 KB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
- **[INFO]** Fonts are 205 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks.
- **[WARNING]** 105 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
- **[INFO]** Estimated 0.39 g CO2 per page load

### Third-Party Impact (D — 50/100)

*100% third-party, 0 ms blocking*

- **[WARNING]** Third-party code accounts for 100% of page weight (1.9 MiB of 1.9 MiB)
- **[PASS]** Third-party blocking time is low (0 ms)

### Text Compression (A+ — 100/100)

*All text resources are compressed*

- **[PASS]** All text resources are compressed

### Image Optimization (C — 60/100)

*17 images, 0 KB saveable*

- **[WARNING]** https://assets.mayoclinic.org/content/dam/mayoclin... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://assets.mayoclinic.org/content/dam/mayoclin... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://assets.mayoclinic.org/content/dam/mayoclin... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (F — 20/100)

*10176ms total JS execution*

- **[WARNING]** https://www.mayoclinic.org/_next/static/chunks/fra...: 1772ms CPU time
- **[WARNING]** https://tagdelivery.mayoclinic.org/dotorg-aem/prod...: 1524ms CPU time
- **[WARNING]** Unattributable: 1215ms CPU time
- **[WARNING]** https://tagdelivery.mayoclinic.org/dotorg-aem/prod...: 1188ms CPU time
- **[WARNING]** https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJ...: 1054ms CPU time
- **[WARNING]** Third-party scripts: 10176ms (100% of total)

### Font Loading (A+ — 100/100)

*5 fonts (205 KB)*

- **[INFO]** 5 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (C — 60/100)

*42 scripts, 248 KB unused*

- **[WARNING]** https://resources.digital-cloud-west.medallia.com/...: 43 KB unused (50%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://nexus.ensighten.com/mayo_clinic/clinic_aem...: 43 KB unused (58%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.mayoclinic.org/_next/static/chunks/pag...: 40 KB unused (24%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://assets.mayoclinic.org/content/dam/cpm-tran...: 38 KB unused (46%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.mayoclinic.org/raqLBDcUp1E8/rcFwkY/VqJ...: 32 KB unused (20%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 248 KB

### Resource Caching (A+ — 100/100)

*All resources properly cached*

- **[PASS]** No caching issues found

### Critical Rendering Path (A+ — 100/100)

*No render-blocking resources*

- **[PASS]** No render-blocking resources detected

### Resource Hints (A+ — 100/100)

*2 hints, 0 missing preconnects*

- **[PASS]** Page uses 2 resource hint(s)

### Page Weight Inventory (D — 40/100)

*105 resources · 1.9 MB · 248 KB savings available*

- **[WARNING]** Page weight 896 KB over 1MB target
- **[INFO]** ~248 KB of savings available
- **[WARNING]** 104 third-party resources (100% of weight)

### Render-Blocking Resources (A+ — 100/100)

*No render-blocking resources detected*

- **[PASS]** No render-blocking resources detected in <head>

### Third-Party Resources (A+ — 100/100)

*No third-party resources detected*


---

## Content Quality

### Links (F — 40/100)

*195 links checked, 108 healthy, 87 broken*

- **[CRITICAL]** 108 of 195 links are healthy
- **[WARNING]** Broken link: https://mayoclinic.org/assets/images/apple-touch-icon-152... — Found in <link href>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/assets/images/favicon.png — Found in <link href>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/polyfills-c67a... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/250.0e87e38b6e... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/2765.88d29488f... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/6314.a6ea5b88b... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/7778.687f1b806... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/7439.dcd229dd3... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/9802.f3a34fcce... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/4526.a5cdd12f9... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/3349.fbb7ca6a8... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/webpack-ea9c59... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/framework-a6b4... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/main-778d51de2... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/pages/_app-e9e... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/chunks/pages/%5B%5B..... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu... — Found in <script src>. Returns HTTP 403.
- **[WARNING]** Broken link: https://mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu... — Found in <script src>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/ — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/appointments — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/member-experience — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/patient-centered-care — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-mayo-clinic — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/locations — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/patient-visitor-guide — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/billing-insurance — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/international — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-mayo-clinic/contact — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/drugs-supplements — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/giving-to-mayo-clinic — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/giving-to-mayo-clinic/contact-us/f... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/giving-to-mayo-clinic/contact-us — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=A — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=B — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=C — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=D — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=E — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=F — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=G — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=H — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=I — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=J — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=K — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=L — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=M — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=N — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=O — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=P — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=R — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=S — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=T — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=U — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=V — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=W — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=X — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=Y — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=Z — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/diseases-conditions/index?letter=%23 — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-mayo-clinic/quality/top-ranked — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/patient-visitor-guide/arizona — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/patient-visitor-guide/florida — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/patient-visitor-guide/minnesota — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/uk — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-this-site — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-this-site/health-information... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-mayo-clinic/aco — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/billing-insurance/price-estimates/... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/executive-health — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-mayo-clinic/international-bu... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-mayo-clinic/facilities-and-r... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-mayo-clinic/supplier-informa... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/international/contact — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/international/costs-and-insurance — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/international/support/representati... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/billing-insurance/financial-assist... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/billing-insurance/financial-assist... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/billing-insurance/financial-assist... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/billing-insurance/financial-assist... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-this-site/terms-conditions-u... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-this-site/privacy-policy — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-this-site/accessibility-stat... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/about-this-site/advertising-sponso... — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/site-help/site-map — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/es — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/ar — Found in <a href>. Returns HTTP 403.
- **[CRITICAL]** Broken link: https://mayoclinic.org/zh-hans — Found in <a href>. Returns HTTP 403.

### Mixed Content (A+ — 100/100)

*No mixed content detected — all resources use HTTPS.*

- **[PASS]** No mixed content detected — all resources use HTTPS

### Open Graph (C — 70/100)

*Open Graph tags are partially configured — some improvements recommended.*

- **[CRITICAL]** og:image is not reachable — The og:image URL could not be fetched. Social platforms won't be able to display it.
- **[WARNING]** Missing og:description — The og:description tag controls the description in social sharing previews.
- **[INFO]** Missing twitter:card — Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.

### Structured Data (D — 60/100)

*3 JSON-LD block(s) found — issues found that may affect search visibility.*

- **[WARNING]** Missing or invalid @context in block #2 — The @context should be "https://schema.org" for search engines to recognize the data.
- **[WARNING]** Missing @type in block #2 — Search engines need @type to understand the structured data.
- **[WARNING]** Missing required property "itemListElement" for BreadcrumbList — The "itemListElement" property is required for the BreadcrumbList schema type.
- **[PASS]** Custom type "WebPage" — unable to validate specific properties
- **[PASS]** 3 JSON-LD blocks found

---

## Infrastructure

### DNS Records (A+ — 95/100)

*1 A records, 4 ms lookup*

- **[PASS]** Resolves to 1 IPv4 address(es)
- **[INFO]** Single A record — no DNS redundancy — Multiple A records provide failover if one server goes down.
- **[INFO]** No IPv6 (AAAA) records
- **[PASS]** 8 nameserver(s) configured
- **[PASS]** 4 mail exchanger(s) configured
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[PASS]** SPF record present in TXT
- **[PASS]** DNS resolution time: 4 ms

### Redirect Chain (A — 90/100)

*1 redirect(s), 904 ms total*

- **[PASS]** Single redirect
- **[INFO]** WWW normalization redirect
- **[INFO]** Redirect overhead: 904 ms total

### IPv6 Readiness (C — 60/100)

*No IPv6 support*

- **[INFO]** No IPv6 (AAAA) records found — IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

### Crawlability (A+ — 100/100)

*robots.txt present, sitemap with 3992 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 3992 entries
- **[PASS]** robots.txt references sitemap

### URL Variants (A+ — 100/100)

*www/non-www, trailing slash, HTTP→HTTPS*

- **[PASS]** HTTP correctly 301-redirects to HTTPS

### Domain Intelligence (A+ — 100/100)

*mayoclinic.org — via CSC Corporate Domains, Inc., 29 years, 7 months old, hosted on MAYO - Mayo Foundation for Medical Education and Research, US*

- **[PASS]** Domain registered until Feb 9, 2028 (1 years, 10 months remaining)
- **[INFO]** DNSSEC is not enabled — DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
- **[PASS]** Registrar: CSC Corporate Domains, Inc.
- **[WARNING]** Registrar lock is NOT enabled — The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
- **[PASS]** Hosting: MAYO - Mayo Foundation for Medical Education and Research, US

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (A — 85/100)

*No consent signals detected*

- **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required.
- **[PASS]** Terms of service link found
- **[INFO]** No cookie consent banner detected
- **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance.

### Language & i18n (A — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (A+ — 100/100)

*Viewport properly configured*

- **[PASS]** Viewport meta tag is present
- **[PASS]** width=device-width is set
- **[PASS]** User zooming is allowed

### Third-Party Trackers (C — 55/100)

*5 trackers detected*

- **[INFO]** 5 third-party trackers detected — Found 3 analytics, 0 advertising, 0 marketing, 2 tag manager trackers.
- **[WARNING]** Trackers detected but no cookie policy found — This page loads 5 trackers but no cookie policy was detected. GDPR requires disclosure when using tracking cookies.
- **[WARNING]** Trackers detected but no privacy policy found — Most data protection regulations require a privacy policy when collecting user data via trackers.

### Cookie & Tracker Inventory (A+ — 100/100)

*0 cookies · 5 trackers · 0 pre-consent*

- **[INFO]** 5 third-party tracker(s) detected on page

---

## Legal

### Legal Page Ecosystem (C — 60/100)

*2 of 7 expected legal pages detected*

- **[PASS]** Privacy Policy detected — Found at /about-this-site/privacy-policy.
- **[PASS]** Terms of Service detected — Found at /about-this-site/terms-conditions-use-policy, linked from footer.
- **[INFO]** Cookie Policy not detected — No link matching common Cookie Policy URL patterns or link text was found. Most websites are expected to have a Cookie Policy, especially those collecting user data.
- **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data.
- **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data.
- **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data.
- **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data.

### Copyright Notice (A+ — 100/100)

*© 1998-2026 Mayo Foundation for Medical Education and Resea…*

- **[PASS]** Copyright notice is up to date — Copyright notice is up to date: © 1998-2026 Mayo Foundation for Medical Education and Research
- **[PASS]** Copyright holder: Mayo Foundation for Medical Education and Research

### Regulatory Indicators

*2 regulatory indicator(s) detected*

- **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments.
- **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.
- **[INFO]** ADA indicators detected (moderate confidence) — Indicators suggesting ADA may be relevant: Accessibility statement page found. Americans with Disabilities Act / Section 508 — requires digital accessibility for people with disabilities.

### Third-Party Data Sharing

*0 third-party service(s) detected*

- **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows.
- **[INFO]** No recognized third-party data-sharing services detected — This page does not appear to load external tracking, analytics, or advertising scripts.

### Compliance Badges (C — 55/100)

*0 compliance badge(s) detected*

- **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges.

---

## Availability

### CDN & Delivery (D — 50/100)

*No CDN detected*

- **[WARNING]** No CDN detected — A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

### HTTP Caching (F — 30/100)

*No cache headers*

- **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

### Transport Security (B — 75/100)

*HTTP/3, HSTS, and TLS version analysis*

- **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
- **[WARNING]** Missing Strict-Transport-Security header — HSTS tells browsers to only use HTTPS, preventing SSL stripping attacks.

---

## Accessibility

### Landmark Structure (A+ — 100/100)

*8 landmarks*

- **[PASS]** <main> landmark present
- **[PASS]** 5 <nav> landmark(s) found
- **[PASS]** All <nav> elements are properly labeled
- **[PASS]** Skip navigation link present

### Heading Hierarchy (A+ — 100/100)

*23 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (A+ — 100/100)

*All 13 images OK*

- **[PASS]** 5 decorative image(s) correctly marked
- **[PASS]** 8 image(s) with good alt text

### Form Accessibility (A+ — 100/100)

*All 2 controls labeled*

- **[PASS]** 2 control(s) properly labeled

### Link & Button Quality (A — 90/100)

*1 issue(s) across 175 links and 15 buttons*

- **[CRITICAL]** 1 button(s) with no accessible text — Icon-only buttons need an aria-label so screen readers can announce them.
- **[PASS]** 175 link(s) with descriptive text

---

## UX

### 404 Error Page (F — 5/100)

*HTTP 403, bare page*

- **[WARNING]** Unexpected status code: HTTP 403 — Expected HTTP 404 but received 403. This may confuse search engine crawlers.
- **[WARNING]** Bare server default 404 page — The 404 page has no custom styling. Users hitting a broken link see a generic error with no way to navigate back. Add a custom 404 page with your site navigation and a search bar.

### Favicon & Branding (F — 30/100)

*2 icon(s) detected*

- **[WARNING]** No favicon.ico at site root — Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.
- **[PASS]** HTML icon links detected
- **[PASS]** Apple touch icon present

### Web Manifest (D — 40/100)

*Not found*

- **[INFO]** No web manifest found — No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

### Dark Mode Support (B — 70/100)

*Dark mode detected*

- **[PASS]** Dark-specific theme-color detected — A theme-color with media='(prefers-color-scheme: dark)' adapts the browser toolbar for dark mode.
- **[PASS]** prefers-color-scheme CSS detected in inline styles
- **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan.

### Print Stylesheet (D — 40/100)

*No print styles*

- **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

### Navigation UX (F — 30/100)

*1 navigation pattern(s)*

- **[PASS]** Skip navigation link detected
- **[PASS]** 5 navigation landmark(s) detected

---

## SEO

### Canonical URL (A+ — 95/100)

*Properly configured*

- **[PASS]** Canonical tag present
- **[PASS]** Canonical is self-referencing
- **[PASS]** Canonical matches final URL after redirects
- **[PASS]** Canonical target reachable (self-referencing)
- **[INFO]** Canonical points to a different domain

### Meta Tags (A+ — 95/100)

*Title optimized*

- **[PASS]** Page title is set
- **[PASS]** Title length (39 chars) is optimal
- **[INFO]** Title and H1 have very different wording — Alignment helps users confirm they've reached the right page.

### Content Depth (C — 65/100)

*708 words, Very Difficult*

- **[PASS]** Page has 708 words of content
- **[INFO]** Text-to-HTML ratio is 0% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Very Difficult (grade 21)

### Internal Links (A+ — 100/100)

*91 internal, 84 external*

- **[PASS]** 91 internal links (52%)
- **[PASS]** 100% of links use descriptive anchor text
- **[INFO]** 91 internal / 84 external links

### Image SEO (A+ — 100/100)

*13 images, 13 descriptive filenames*

- **[PASS]** All images have descriptive filenames

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (B — 70/100)

*0.53g CO2 per view*

- **[INFO]** 0.53g CO2 per page view — This page transfers 1.9 MB, producing an estimated 0.53g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.10g, network 0.09g, end-user device 0.34g.
- **[INFO]** At 10,000 monthly views: 63.7 kg CO2/year — With 10,000 page views per month, this page would generate approximately 63.7 kg of CO2 annually — equivalent to charging 7965 smartphones.

### Green Hosting (D — 40/100)

*Not green*

- **[INFO]** No confirmed renewable energy commitment detected — Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
- **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.

### Repeat Visit Weight (A+ — 100/100)

*95% cached*

- **[PASS]** 95% reduction on repeat visits — Returning visitors download only 98 KB (vs 1920 KB first visit). 103 of 105 resources are served from browser cache, saving 0.50g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.03g CO2 (first visit: 0.53g)

### Carbon Budget (B — 70/100)

*43th percentile*

- **[INFO]** 0.53g CO2 — below the median website (0.60g) — Better than an estimated 57% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
- **[INFO]** Estimated 43th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (B — 80/100)

*87% efficient*

- **[INFO]** Transfer efficiency: 87% — An estimated 247 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 247 KB of unused JavaScript. This wasted data produces 0.07g of unnecessary CO2 per page view.

---

---

*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/39f3018e-72cc-4823-bb1f-3511ebee8871*