HTTP Headers for slack.com

Responds with HTTP 200 OK from Apache — 3 of 6 security headers present.

URL to Check

200 OKhttps://slack.com/

Security Headers3/6

HSTS

CSP

X-Frame-Options

X-Content-Type-Options

Referrer-Policy

Permissions-Policy

All Response Headers (26)

alt-svch3=":443"; ma=2592000, h3-29=":443"; ma=2592000, quic=":443"; ma=2592000

connectionclose

content-encodingbr

content-typetext/html; charset=utf-8

cross-origin-opener-policysame-origin

dateFri, 24 Apr 2026 10:08:56 GMT

referrer-policyno-referrer

serverApache

set-cookiex=3ffd8a2aaccb43d1d0bcd44d31ae64de.1777025336; expires=Fri, 24-Apr-2026 10:23:56 GMT; Max-Age=900; path=/; domain=.slack.com; secure; SameSite=None

strict-transport-securitymax-age=31536000; includeSubDomains; preload

timing-allow-origin*

transfer-encodingchunked

varyAccept-Encoding

via1.1 slack-prod.tinyspeck.com, envoy-www-iad-lffhtepz,envoy-edge-iad-nemtvily

x-backendmain_normal

x-edge-backendenvoy-www

x-envoy-attempt-count1

x-envoy-upstream-service-time120

x-frame-optionsSAMEORIGIN

x-geoname-idnotfound

x-serverslack-www-hhvm-main-iad-68ua3ejarje6

x-slack-backendr

x-slack-edge-shared-secret-outcomeno-match

x-slack-shared-secret-outcomeno-match

x-slack-unique-idaetBOK1SbjwBi6NvSV3_9gAAADA

x-xss-protection0

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