DNS Gurus
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14 Headers

Detected Technologies from Headers

See all in URL Inspect 1
Express logo Express

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

2 headers
Connection
Performance
close
Vary
Performance
Accept-Encoding

Caching Headers

1 headers
Etag
Caching
W/"18-XPDV80vbMk4yY1/PADG4jYM4rSI"

Content Headers

2 headers
Content-Length
Content
24
Content-Type
Content
application/json; charset=utf-8

Server Headers

1 headers
X-Powered-By
Express logo
Server
Express

CORS Headers

0 headers
No CORS headers found

Cookies Headers

0 headers
No cookies headers found

Other Headers

8 headers
Date
Other
Sat, 14 Feb 2026 13:50:02 GMT
Ratelimit-Limit
Other
100
Ratelimit-Policy
Other
100;w=60
Ratelimit-Remaining
Other
96
Ratelimit-Reset
Other
54
X-Aws-Region
Other
us-east-1
X-Documentation
Other
https://api.system1.com/docs
X-S1api-Version
Other
0.0.15

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching

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