HTTP Headers Analysis for https://massivegrid.com

Detected Technologies from Headers

See all in URL Inspect 1

Nginx

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=5; includeSubDomains

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin-when-cross-origin

Permissions-Policy

Present

geolocation=(self), payment=(self)

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Add Content-Security-Policy header to prevent XSS attacks

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

Vary

Performance

Accept-Encoding

accept-ranges: bytes
connection: close
vary: Accept-Encoding

Caching Headers

Etag

Caching

"6a578b67-bb66"

Last-Modified

Caching

Wed, 15 Jul 2026 13:30:15 GMT

etag: "6a578b67-bb66"
last-modified: Wed, 15 Jul 2026 13:30:15 GMT

Content Headers

Content-Length

Content

47974

Content-Type

Content

text/html

content-length: 47974
content-type: text/html

Server Headers

Server

nginx

server: nginx

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Date

Other

Wed, 22 Jul 2026 22:47:39 GMT

X-Permitted-Cross-Domain-Policies

Other

none

alt-svc: h3=":443"; ma=86400
date: Wed, 22 Jul 2026 22:47:39 GMT
x-permitted-cross-domain-policies: none

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching