DNS Gurus

HTTP Headers Analysis for https://crates.io

Analyzed on November 02, 2025 at 19:09 UTC

URL: https://crates.io | Status: 404

13 Headers
Total Found

HTTP Security Headers

Status
Strict-Transport-Security
Good
max-age=31536000; includeSubDomains
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
  • • Consider adding 'preload' to HSTS for maximum security
  • • 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

1 headers
Connection
Performance
keep-alive

Caching Headers

0 headers
No caching headers found

Content Headers

1 headers
Content-Length
Content
0

Server Headers

1 headers
Server
Server
Heroku

CORS Headers

1 headers
Access-Control-Allow-Origin
Cors
*

Cookies Headers

0 headers
No cookies headers found

Other Headers

8 headers
Date
Other
Sun, 02 Nov 2025 19:09:41 GMT
Nel
Other
{"report_to":"heroku-nel","response_headers":["Via"],"max_age":3600,"success_fraction":0.01,"failure_fraction":0.1}
Report-To
Other
{"group":"heroku-nel","endpoints":[{"url":"https://nel.heroku.com/reports?s=bf1%2BItJuKAOJqeY2R83QwUaAZxYDdhzY%2BzZ%2BeFOLgeo%3D\u0026sid=af571f24-03ee-46d1-9f90-ab9030c2c74c\u0026ts=1762110581"}],"max_age":3600}
Reporting-Endpoints
Other
heroku-nel="https://nel.heroku.com/reports?s=bf1%2BItJuKAOJqeY2R83QwUaAZxYDdhzY%2BzZ%2BeFOLgeo%3D&sid=af571f24-03ee-46d1-9f90-ab9030c2c74c&ts=1762110581"
Via
Other
1.1 heroku-router, 1.1 d125bf8405e840aa51a88ae3d8d91fb2.cloudfront.net (CloudFront)
X-Amz-Cf-Id
Other
CIWK-r9FSank1CfjoWYcwFq1mMi-3l8nkvElQ01BhIQRnGKYb7XiRw==
X-Amz-Cf-Pop
Other
IAD12-P1
X-Cache
Other
Error from cloudfront

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching

Analysis completed in 133ms