HTTP Headers Analysis for https://api.convertkit.com

Open Cached · just now

29 Headers

Detected Technologies from Headers

See all in URL Inspect 4

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=63072000

Content-Security-Policy

Weak

worker-src; object-src; base-uri; +3 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Excellent

DENY

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Significantly strengthen CSP directives
• 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

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

rsc, accept-encoding, Accept, User-Agent

connection: close
transfer-encoding: chunked
vary: rsc, accept-encoding, Accept, User-Agent

Caching Headers

Age

Caching

31670

Cache-Control

Caching

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

Expires

Caching

0

Pragma

Caching

no-cache

age: 31670
cache-control: no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0
expires: 0
pragma: no-cache

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

Server

cloudflare

X-Version

Server

dpl_2HoCPhodiNdQCGFHuj6wuuZTb4Yb

server: cloudflare
x-version: dpl_2HoCPhodiNdQCGFHuj6wuuZTb4Yb

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: __cf_bm=o.XlYpGlw9dnm7SQGWLnx9h46VB3qGmgKkqxNyzXoRI-1786158429.677048-1.0.1.1-dcoScW9l1_OCXrqRkHnspaoQMHDiOKydmGaTnCsnRMmiehbawv1l3SfTKyYQ2rG6gr6GpkM1HwopZFzX4TRpkR2lCr8I6aSPQ_a1z0e.MpwX.7i_6s3bEPVHRf94Z_KS; HttpOnly; SameSite=None; Secure; Path=/; Domain=kit.com; Expires=Sat, 08 Aug 2026 03:37:09 GMT

Other Headers

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

a27b4f297c8bd638-IAD

Date

Other

Sat, 08 Aug 2026 03:07:09 GMT

Link

Other

URL

/llms.txt

rel=llms-txt

URL

/llms-full.txt

rel=llms-full-txt

URL

/.well-known/api-catalog

rel=api-catalog

URL

/.well-known/mcp/server-card.json

rel=mcp-server-card

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=8,cfOrigin;dur=63

X-Llms-Txt

Other

/llms.txt

X-Matched-Path

Other

/_sites/[subdomain]/[[...slug]]

X-Mint-Proxy-Version

Other

1.0.0-prod

X-Mintlify-Client-Version

Other

0.0.3414

X-Nextjs-Prerender

Other

1

X-Nextjs-Stale-Time

Other

60

X-Served-Version

Other

dpl_2HoCPhodiNdQCGFHuj6wuuZTb4Yb

X-Vercel-Cache

Other

MISS

X-Vercel-Id

Other

iad1:iad1::iad1::xmsls-1786158429685-91ed5f16fb79

X-Vercel-Project-Id

Other

prj_NdMUpHpUIb41Po1H8c6hrChv2bgr

cf-cache-status: DYNAMIC
cf-ray: a27b4f297c8bd638-IAD
date: Sat, 08 Aug 2026 03:07:09 GMT
link: </llms.txt>; rel="llms-txt", </llms-full.txt>; rel="llms-full-txt", </.well-known/api-catalog>; rel="api-catalog", </.well-known/mcp/server-card.json>; rel="mcp-server-card", </.well-known/agent-card.json>; rel="agent-card", </.well-known/agent-skills/index.json>; rel="agent-skills"
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=8,cfOrigin;dur=63
x-llms-txt: /llms.txt
x-matched-path: /_sites/[subdomain]/[[...slug]]
x-mint-proxy-version: 1.0.0-prod
x-mintlify-client-version: 0.0.3414
x-nextjs-prerender: 1
x-nextjs-stale-time: 60
x-served-version: dpl_2HoCPhodiNdQCGFHuj6wuuZTb4Yb
x-vercel-cache: MISS
x-vercel-id: iad1:iad1::iad1::xmsls-1786158429685-91ed5f16fb79
x-vercel-project-id: prj_NdMUpHpUIb41Po1H8c6hrChv2bgr

Recommendations

Enable compression (gzip/brotli) to improve performance