HTTP Headers Analysis for https://api.vapi.ai

Detected Technologies from Headers

See all in URL Inspect 2

Cloudflare CDN

Express

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Good

default-src; script-src; style-src; +6 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Strengthen CSP by removing 'unsafe-eval'
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• 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

connection: close

Caching Headers

Etag

Caching

W/"52-qDHXEjipawxO+O8pWLtD0dgmokI"

etag: W/"52-qDHXEjipawxO+O8pWLtD0dgmokI"

Content Headers

Content-Length

Content

82

Content-Type

Content

text/html; charset=utf-8

content-length: 82
content-type: text/html; charset=utf-8

Server Headers

Server

cloudflare

X-Powered-By

Server

Express

server: cloudflare
x-powered-by: Express

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

Set-Cookie

Cookies

set-cookie: _cfuvid=sQF1CG2pzsY27naOffJ7t.ckNnywoArKhOmddfRI1jk-1777762313.9126272-1.0.1.1-Gs26.HYfiYXcse.0h4G3AAuDpwzayEJTr_iRAS1R5jE; HttpOnly; SameSite=None; Secure; Path=/; Domain=vapi.ai

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

9f5a97ddf92d74e8-IAD

Date

Other

Sat, 02 May 2026 22:51:54 GMT

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=6,cfOrigin;dur=83

X-Robots-Tag

Other

noindex

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: 9f5a97ddf92d74e8-IAD
date: Sat, 02 May 2026 22:51:54 GMT
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=6,cfOrigin;dur=83
x-robots-tag: noindex

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching

Consider removing X-Powered-By header to hide server technology