HTTP Headers Analysis for https://mcp.mailercloud.com

Detected Technologies from Headers

See all in URL Inspect 2

Cloudflare NEL Monitoring

Cloudflare CDN

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=15552000; includeSubDomains; preload

Content-Security-Policy

Good

default-src; img-src; style-src; +3 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Present

same-origin

Permissions-Policy

Present

geolocation=(), microphone=(), camera=()

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Strengthen CSP by removing 'unsafe-eval'

Performance Headers

Connection

Performance

close

Vary

Performance

accept-encoding

connection: close
vary: accept-encoding

Caching Headers

Cache-Control

Caching

no-store, no-cache, must-revalidate, max-age=0

Expires

Caching

0

Pragma

Caching

no-cache

cache-control: no-store, no-cache, must-revalidate, max-age=0
expires: 0
pragma: no-cache

Content Headers

Content-Length

Content

19

Content-Type

Content

text/plain; charset=utf-8

content-length: 19
content-type: text/plain; charset=utf-8

Server Headers

Server

cloudflare

server: cloudflare

CORS Headers

Access-Control-Allow-Headers

Cors

Content-Type, Authorization, Mcp-Session-Id, Mcp-Protocol-Version

Access-Control-Allow-Methods

Cors

GET, POST, DELETE, OPTIONS

Access-Control-Allow-Origin

Cors

*

Access-Control-Expose-Headers

Cors

Mcp-Session-Id, Mcp-Protocol-Version

Access-Control-Max-Age

Cors

86400

access-control-allow-headers: Content-Type, Authorization, Mcp-Session-Id, Mcp-Protocol-Version
access-control-allow-methods: GET, POST, DELETE, OPTIONS
access-control-allow-origin: *
access-control-expose-headers: Mcp-Session-Id, Mcp-Protocol-Version
access-control-max-age: 86400

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Apo-Via

Other

origin,host

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

9fa371006e39a5b8-IAD

Date

Other

Mon, 11 May 2026 19:03:02 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=rHAriPPR1xkdKWurrZ5URrr1Yl25ZkWSqi8ExDlHqt7hyd1qMnGwuH9lvnBMgImJ%2F556t7L2JGhpGttR%2BaoXVWZ%2FJQq0odOBXJv%2B%2BF5CimdXz%2BJo6UKzvxA2wOyQleHsgmyGW1Y%3D

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=281,cfOrigin;dur=0

Speculation-Rules

Other

"/cdn-cgi/speculation"

alt-svc: h3=":443"; ma=86400
cf-apo-via: origin,host
cf-cache-status: DYNAMIC
cf-ray: 9fa371006e39a5b8-IAD
date: Mon, 11 May 2026 19:03:02 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=rHAriPPR1xkdKWurrZ5URrr1Yl25ZkWSqi8ExDlHqt7hyd1qMnGwuH9lvnBMgImJ%2F556t7L2JGhpGttR%2BaoXVWZ%2FJQq0odOBXJv%2B%2BF5CimdXz%2BJo6UKzvxA2wOyQleHsgmyGW1Y%3D"}]}
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=281,cfOrigin;dur=0
speculation-rules: "/cdn-cgi/speculation"

Recommendations

Enable compression (gzip/brotli) to improve performance