HTTP Headers Analysis for https://ably-realtime.com

Detected Technologies from Headers

See all in URL Inspect 2

Cloudflare CDN

Heroku

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=15552000; preload

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin-when-cross-origin

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Add Content-Security-Policy header to prevent XSS attacks
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Origin,Accept-Encoding

connection: close
transfer-encoding: chunked
vary: Origin,Accept-Encoding

Caching Headers

Cache-Control

Caching

max-age=0, private, must-revalidate

cache-control: max-age=0, private, must-revalidate

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

cloudflare

X-Runtime

Server

0.155224

server: cloudflare
x-runtime: 0.155224

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: ably_device_id=K%2BUmd1ShC5RkxzLUvlyfvaDqlA%2FSX%2FK%2B6RbcZXoHTrTi6Iu339YlYnD7aPjU6J%2BuVBWxKIRO%2F%2BUiZxr7NKD%2BKHinpx4%2Fx3RUSb9uxjIrrnRp59%2BSqsZ223nBZu4ImyaQc9ibgeWnDxmCllmQ5nMA1QWScWLWojeJnVZhOUnfu0lTgqOQKQUhes17huY%3D--8H%2FEhMqGyyFZV4Lw--JZSsehWTWWbGosJnO0c66A%3D%3D; path=/; expires=Mon, 12 Apr 2027 23:43:54 GMT; HttpOnly; SameSite=Lax; secure
_ably_session=GXKCX9zdljeMUumV6ZdIWpueb6H80qsm89r81Vi0apvb4VVL8l0TMKE6i2ZhcxzzGFFafde2qsV%2FCxR0ctaEeUXu6UzsptZIzAZVPAE0XQVoHivMb9UZqI2fLS8TReJIAon5JU7Wop9f5RB5VPv5Ja2j4nn6XO1NyInxQc8k9Teg0VdJSJHmXYLOg8viGchpfO2%2F%2FTr6XyQvqSLWl1RVF%2BGybZsmRhbo7juHYzoRzIV61kUudvFgLkj0Inw2UEWX%2Fc35vSDUGhPdaT%2BRd4lHJypSMHaIO4gShOYlObhyV6cJIOHI3yd5d5dLz7zBRFcBSLIH%2BeejjvfrrSTnNW%2BpO3zyv6Va7JQ%3D--aMIzhjDbK0MQ0yp0--cnwtB6mGNOqm1E2ySyiIXw%3D%3D; path=/; expires=Mon, 13 Apr 2026 01:43:54 GMT; secure; HttpOnly; SameSite=Lax

Other Headers

Cf-Cache-Status

Other

BYPASS

Cf-Ray

Other

9eb6188a1938170d-IAD

Date

Other

Sun, 12 Apr 2026 23:43:54 GMT

Nel

Other

Report-To Group heroku-nel max-age: 1h

success: 1.0% failure: 10.0%

Report-To

Other

Group heroku-nel max-age: 1h

Endpoint 1 https://nel.heroku.com/reports?s=dTm6i%2BpNieU5eEoKFW1kuFpfZgICvHH3BnU%2FgidoMNg%3D&sid=c46efe9b-d3d2-4a0c-8c76-bfafa16c5add&ts=1776037433

Reporting-Endpoints

Other

heroku-nel="https://nel.heroku.com/reports?s=dTm6i%2BpNieU5eEoKFW1kuFpfZgICvHH3BnU%2FgidoMNg%3D&sid=c46efe9b-d3d2-4a0c-8c76-bfafa16c5add&ts=1776037433"

Via

Other

2.0 heroku-router

X-Download-Options

Other

noopen

X-Permitted-Cross-Domain-Policies

Other

none

X-Request-Id

Other

676644f6-87c8-4436-b494-7e85f8494d5d

cf-cache-status: BYPASS
cf-ray: 9eb6188a1938170d-IAD
date: Sun, 12 Apr 2026 23:43:54 GMT
nel: {"report_to":"heroku-nel","response_headers":["Via"],"max_age":3600,"success_fraction":0.01,"failure_fraction":0.1}
report-to: {"group":"heroku-nel","endpoints":[{"url":"https://nel.heroku.com/reports?s=dTm6i%2BpNieU5eEoKFW1kuFpfZgICvHH3BnU%2FgidoMNg%3D\u0026sid=c46efe9b-d3d2-4a0c-8c76-bfafa16c5add\u0026ts=1776037433"}],"max_age":3600}
reporting-endpoints: heroku-nel="https://nel.heroku.com/reports?s=dTm6i%2BpNieU5eEoKFW1kuFpfZgICvHH3BnU%2FgidoMNg%3D&sid=c46efe9b-d3d2-4a0c-8c76-bfafa16c5add&ts=1776037433"
via: 2.0 heroku-router
x-download-options: noopen
x-permitted-cross-domain-policies: none
x-request-id: 676644f6-87c8-4436-b494-7e85f8494d5d

Recommendations

Enable compression (gzip/brotli) to improve performance