DNS Gurus
Cached · just now
21 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=31536000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Good
no-referrer
Permissions-Policy
Missing
Not configured
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Content-Type-Options: nosniff
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

3 headers
Connection
Performance
close
Transfer-Encoding
Performance
chunked
Vary
Performance
User-Agent, Accept-Encoding

Caching Headers

1 headers
Cache-Control
Caching
public, max-age=1

Content Headers

1 headers
Content-Type
Content
text/html; charset=utf-8

Server Headers

2 headers
Server
Server
cloudflare
X-Powered-By
Server
Next.js

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
_cfuvid=ZErOS5iZxt4CMde.BQRc5AbmX.vccge_luNQC7OFuBg-1766581923527-0.0.1.1-604800000; path=/; domain=.www.mercari.com; HttpOnly; Secure; SameSite=None

Other Headers

8 headers
Cf-Cache-Status
Other
DYNAMIC
Cf-Ray
Other
9b30591cf8487ae9-IAD
Date
Other
Wed, 24 Dec 2025 13:12:03 GMT
Document-Policy
Other
js-profiling
Origin-Agent-Cluster
Other
?1
Via
Other
1.1 google
X-Download-Options
Other
noopen
X-Envoy-Upstream-Service-Time
Other
67

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology

Analysis completed in 279ms