HTTP Headers Analysis for https://placeholderapi.com

Detected Technologies from Headers

See all in URL Inspect 1

Cloudflare CDN

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=15552000; includeSubDomains; preload

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Excellent

DENY

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

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 Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• 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

No caching headers found

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: cosmetics=%7B%22rightSearchLayout%22%3Afalse%2C%22leftContentLayout%22%3Afalse%2C%22advancedRendering%22%3Atrue%2C%22externalLinksNewTab%22%3Atrue%2C%22notUsingBlockers%22%3Afalse%2C%22hideModrinthAppPromos%22%3Afalse%2C%22preferredDarkTheme%22%3A%22dark%22%2C%22searchDisplayMode%22%3A%7B%22mod%22%3A%22list%22%2C%22plugin%22%3A%22list%22%2C%22resourcepack%22%3A%22gallery%22%2C%22modpack%22%3A%22list%22%2C%22shader%22%3A%22gallery%22%2C%22datapack%22%3A%22list%22%2C%22server%22%3A%22list%22%2C%22user%22%3A%22list%22%2C%22collection%22%3A%22list%22%7D%2C%22hideStagingBanner%22%3Afalse%7D; Max-Age=315360000; Path=/; Secure; SameSite=Lax
color-mode=%7B%22preference%22%3A%22system%22%2C%22value%22%3A%22dark%22%7D; Max-Age=315360000; Path=/; Secure; SameSite=Lax
featureFlags=%7B%7D; Max-Age=315360000; Path=/; Secure; SameSite=Lax
_cfuvid=Kb.m1L_3MtFR3r9eNFOVuSc2bJ3wD7hhTGujeprT9hk-1779193641.9689083-1.0.1.1-3vGiD3jnNJXfzzSgbp6sJoH06b5HqAoZ4sIDIpyUKr8; HttpOnly; SameSite=None; Secure; Path=/; Domain=modrinth.com

Other Headers

Accept-Ch

Other

Sec-CH-Prefers-Color-Scheme

Cf-Placement

Other

local-IAD

Cf-Ray

Other

9fe318664a13e600-IAD

Critical-Ch

Other

Sec-CH-Prefers-Color-Scheme

Date

Other

Tue, 19 May 2026 12:27:22 GMT

Server-Timing

Other

cfEdge;dur=20,cfOrigin;dur=0,cfWorker;dur=322

accept-ch: Sec-CH-Prefers-Color-Scheme
cf-placement: local-IAD
cf-ray: 9fe318664a13e600-IAD
critical-ch: Sec-CH-Prefers-Color-Scheme
date: Tue, 19 May 2026 12:27:22 GMT
server-timing: cfEdge;dur=20,cfOrigin;dur=0,cfWorker;dur=322

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching