HTTP Headers Analysis for https://300code.com

Detected Technologies from Headers

See all in URL Inspect 2

Cloudflare NEL Monitoring

Cloudflare CDN

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=63072000; includeSubDomains; preload

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

no-referrer-when-downgrade

Permissions-Policy

Missing

Not configured

Recommendations

• Add Content-Security-Policy header to prevent XSS attacks
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding

connection: close
transfer-encoding: chunked
vary: Accept-Encoding

Caching Headers

Cache-Control

Caching

no-cache, private

cache-control: no-cache, private

Content Headers

Content-Type

Content

text/html; charset=UTF-8

content-type: text/html; charset=UTF-8

Server Headers

Server

cloudflare

server: cloudflare

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: XSRF-TOKEN=eyJpdiI6IjAvdDBCamo2ZmVmTGlnZmVjNURBQ1E9PSIsInZhbHVlIjoiVTQxc2F5KzdBL25QZ1RwRHZqdU1MWGhiMjRZa1dlUmsxZmhuZ3hIR0FYRWNYWFpNUVlWOFYzeFlnTUFodVlwdlNxMFFKQzZoazYzU1dJSGxaN2NtWk5vQ3grUlZxcmdvaW45UENGcjlFUXhvbWlWYWFOa0M5ZURwbitnNUdTM1ciLCJtYWMiOiI0YjJkNDZiNTI2OGE2MTBiN2UzZDZkZmU1NzUzOGRmOTIxM2JhNTgzMzY5MjljNmI3YmZhNGRkMTc5ZWZlYTk0IiwidGFnIjoiIn0%3D; expires=Mon, 07 Sep 2026 11:13:49 GMT; Max-Age=43200; path=/; domain=.300code.com; secure
300code_session=eyJpdiI6IldZeTlvSXJnbEZrS0ZlaVl3UTgrdXc9PSIsInZhbHVlIjoiNCt2c0JiMjRlL3RNbWY4TEo2L0ljaFIxT2VFVkhzMTFxYXFmYXIzRThZSEVaamZ6UURYYTRvZEEvZjNXWUpLcTdRb203MXN6M1pDVURYanRjdmVWcnBDMTFPYXBKN2ZvQTZJMTdIRUVsVjVUQ0l1S01jMzE4R3lucjVET25MUloiLCJtYWMiOiI4NTZjZTlmMzQxZmZmNDllNzk2Nzg1NGY0ODJmMDcyZDIwODY2OGE0MGI5MjE0MTZlNjkxNTM5OWY3MDNhYzU1IiwidGFnIjoiIn0%3D; expires=Mon, 07 Sep 2026 11:13:49 GMT; Max-Age=43200; path=/; domain=.300code.com; httponly

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

a3712a9dbac8e5e5-IAD

Date

Other

Sun, 06 Sep 2026 23:13:49 GMT

Nel

Other

Report-To Group cf-nel max-age: 1w

success: 0.0%

Report-To

Other

Group cf-nel max-age: 1w

Endpoint 1 https://a.nel.cloudflare.com/report/v4?s=IrSe%2FMJIjjp3pjxitb4iSn%2BOzRO3diffQi7rAlrJTLUFPtY1bQdRnnjFdMtWRVn95EILD2QLOxj1kuGteNsvQdpvF9dET9L5LFhDobpfhl6SyaAvthl%2BwYOl3cAYxw%3D%3D

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=11,cfOrigin;dur=254

Speculation-Rules

Other

"/cdn-cgi/speculation"

X-Request-Id

Other

f76dcbd0-c41b-46f7-8107-5c3195b07e91

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: a3712a9dbac8e5e5-IAD
date: Sun, 06 Sep 2026 23:13:49 GMT
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=IrSe%2FMJIjjp3pjxitb4iSn%2BOzRO3diffQi7rAlrJTLUFPtY1bQdRnnjFdMtWRVn95EILD2QLOxj1kuGteNsvQdpvF9dET9L5LFhDobpfhl6SyaAvthl%2BwYOl3cAYxw%3D%3D"}]}
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=11,cfOrigin;dur=254
speculation-rules: "/cdn-cgi/speculation"
x-request-id: f76dcbd0-c41b-46f7-8107-5c3195b07e91

Recommendations

Enable compression (gzip/brotli) to improve performance