HTTP Response Headers Inspector

Check HTTP status codes (200, 301, 404), server technologies, compression, and security headers (CSP, HSTS).

📑

HTTP Response for openai.com

HTTP/1.1 403 Forbidden
Header Field Value
Status HTTP/1.1 403 Forbidden
Date Tue, 06 Oct 2026 20:11:48 GMT
Content-Type text/html; charset=UTF-8
Content-Length 9936
Connection close
Accept-Ch Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
Cf-Mitigated challenge
X-Frame-Options SAMEORIGIN
Server cloudflare
Critical-Ch Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
Cross-Origin-Embedder-Policy require-corp
Cross-Origin-Opener-Policy same-origin
Cross-Origin-Resource-Policy same-origin
Origin-Agent-Cluster ?1
Permissions-Policy accelerometer=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=(),xr-spatial-tracking=*
Referrer-Policy same-origin
Server-Timing chlray;desc="a467513aacd86320"
X-Content-Type-Options nosniff
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
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Nel {"report_to":"cf-nel","success_fraction":0.01,"max_age":604800}
CF-RAY a467513aacd86320-DEL
alt-svc h3=":443"; ma=86400