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D1
EN

Web response audit

github.com HTTP headers

SEO page with a cached HTTP response header and security signals check.

Results

Status

200

Final URL

https://github.com

Accept-Ranges

bytes

Cache-Control

max-age=0, private, must-revalidate

Content-Language

en-US

Content-Security-Policy

default-src 'none'; base-uri 'self'; child-src github.githubassets.com github.com/assets-cdn/worker/ github.com/assets/ gist.github.com/assets-cdn/worker/; connect-src 'self' uploads.github.com www.githubstatus.com collector.github.com raw.githubusercontent.com api.github.com github-cloud.s3.amazonaws.com github-production-repository-file-5c1aeb.s3.amazonaws.com github-production-upload-manifest-file-7fdce7.s3.amazonaws.com github-production-user-asset-6210df.s3.amazonaws.com *.rel.tunnels.api.visualstudio.com wss://*.rel.tunnels.api.visualstudio.com github.githubassets.com objects-origin.githubusercontent.com copilot-proxy.githubusercontent.com proxy.individual.githubcopilot.com proxy.business.githubcopilot.com proxy.enterprise.githubcopilot.com *.actions.githubusercontent.com wss://*.actions.githubusercontent.com productionresultssa0.blob.core.windows.net productionresultssa1.blob.core.windows.net productionresultssa2.blob.core.windows.net productionresultssa3.blob.core.windows.net productionresultssa4.blob.core.windows.net productionresultssa5.blob.core.windows.net productionresultssa6.blob.core.windows.net productionresultssa7.blob.core.windows.net productionresultssa8.blob.core.windows.net productionresultssa9.blob.core.windows.net productionresultssa10.blob.core.windows.net productionresultssa11.blob.core.windows.net productionresultssa12.blob.core.windows.net productionresultssa13.blob.core.windows.net productionresultssa14.blob.core.windows.net productionresultssa15.blob.core.windows.net productionresultssa16.blob.core.windows.net productionresultssa17.blob.core.windows.net productionresultssa18.blob.core.windows.net productionresultssa19.blob.core.windows.net github-production-repository-image-32fea6.s3.amazonaws.com github-production-release-asset-2e65be.s3.amazonaws.com insights.github.com wss://alive.github.com wss://alive-staging.github.com api.githubcopilot.com api.individual.githubcopilot.com api.business.githubcopilot.com api.enterprise.githubcopilot.com edge.fullstory.com rs.fullstory.com; font-src github.githubassets.com; form-action 'self' github.com gist.github.com copilot-workspace.githubnext.com objects-origin.githubusercontent.com; frame-ancestors 'none'; frame-src viewscreen.githubusercontent.com notebooks.githubusercontent.com www.youtube-nocookie.com; img-src 'self' data: blob: github.githubassets.com media.githubusercontent.com camo.githubusercontent.com identicons.github.com avatars.githubusercontent.com private-avatars.githubusercontent.com github-cloud.s3.amazonaws.com objects.githubusercontent.com release-assets.githubusercontent.com secured-user-images.githubusercontent.com user-images.githubusercontent.com private-user-images.githubusercontent.com opengraph.githubassets.com marketplace-screenshots.githubusercontent.com copilotprodattachments.blob.core.windows.net/github-production-copilot-attachments/ github-production-user-asset-6210df.s3.amazonaws.com customer-stories-feed.github.com spotlights-feed.github.com explore-feed.github.com objects-origin.githubusercontent.com *.githubusercontent.com images.ctfassets.net/8aevphvgewt8/; manifest-src 'self'; media-src github.com user-images.githubusercontent.com secured-user-images.githubusercontent.com private-user-images.githubusercontent.com github-production-user-asset-6210df.s3.amazonaws.com gist.github.com github.githubassets.com assets.ctfassets.net/8aevphvgewt8/ videos.ctfassets.net/8aevphvgewt8/; script-src github.githubassets.com; style-src 'unsafe-inline' github.githubassets.com; upgrade-insecure-requests; worker-src github.githubassets.com github.com/assets-cdn/worker/ github.com/assets/ gist.github.com/assets-cdn/worker/

Content-Type

text/html; charset=utf-8

Date

Thu, 11 Jun 2026 12:26:47 GMT

Etag

W/"37dd329369e666f3a1b85f7de3cbc108"

Referrer-Policy

origin-when-cross-origin, strict-origin-when-cross-origin

Server

github.com

Set-Cookie

_gh_sess=6RxGOtNZBI%2FZHuJpLhkWKSfwj7%2FWoZmbC3iLskOb%2Fy82C7xp5HgSl6%2FvyEdmv%2FKjqRy1DUzHkUfmzdcfErCXxb0hpbNmgQK1NcLM%2Fl3F5vHfcB5GU9iwV1hLluz%2FweT0zzF2KxeVUQb%2B71q%2BXo9npJOXy4WZAyNSzguMaXrfM2ZzBW%2BDCOXUFI8LT%2Bp8Zc6lFJHT96RXXuNTvFM8fhSA7vGeW9tkr7mPuJHavuyDoSD%2FjblANp8wuPAhY5JkhY2zHXUikq6r9XBO4Ml0IXhYMQ%3D%3D--VYY3ln1u1h26d7Yh--LW5aL1h5vkao5Unqa9qbPQ%3D%3D; path=/; HttpOnly; secure; SameSite=Lax, _octo=GH1.1.2111437739.1781180809; expires=Fri, 11 Jun 2027 12:26:49 GMT; domain=.github.com; path=/; secure; SameSite=Lax, logged_in=no; expires=Fri, 11 Jun 2027 12:26:49 GMT; domain=.github.com; path=/; HttpOnly; secure; SameSite=Lax

Strict-Transport-Security

max-age=31536000; includeSubdomains; preload

Vary

X-PJAX, X-PJAX-Container, Turbo-Visit, Turbo-Frame, X-Requested-With, Accept-Language, Sec-Fetch-Site,Accept-Encoding, Accept, X-Requested-With

X-Content-Type-Options

nosniff

X-Frame-Options

deny

X-Github-Request-Id

D5E0:161A70:128B36:F544D:6A2AA989

X-Xss-Protection

0

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Study notes

Short guides for common searches around HTTP Header Checker. Written like lab notes, not marketing.

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