HTTP Headers Analysis for https://opengraph.githubassets.com

Detected Technologies from Headers

See all in URL Inspect 3

GitHub

Fastly

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=31536000

Content-Security-Policy

Good

default-src; style-src; font-src; +1 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

no-referrer

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Strengthen CSP by removing 'unsafe-eval'
• Consider adding Permissions-Policy to control browser features

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

accept-ranges: bytes
connection: close

Caching Headers

Age

Caching

0

Cache-Control

Caching

public, max-age=0

Etag

Caching

W/"7bb71-19c66f10b18"

Last-Modified

Caching

Mon, 16 Feb 2026 14:53:19 GMT

age: 0
cache-control: public, max-age=0
etag: W/"7bb71-19c66f10b18"
last-modified: Mon, 16 Feb 2026 14:53:19 GMT

Content Headers

Content-Length

Content

506737

Content-Type

Content

image/png

content-length: 506737
content-type: image/png

Server Headers

No server headers found

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Mon, 23 Feb 2026 11:05:41 GMT

Via

Other

1.1 varnish, 1.1 varnish

X-Cache

Other

MISS, MISS

X-Cache-Hits

Other

0, 0

X-Dns-Prefetch-Control

Other

off

X-Download-Options

Other

noopen

X-Fastly-Request-Id

Other

50a565a238b32c9a211e17a334d8ab68df29550a

X-Github-Backend

Other

Kubernetes

X-Github-Request-Id

Other

2136:3655CF:2ED254:33EAFC:699C347A

X-Permitted-Cross-Domain-Policies

Other

none

X-Ratelimit-Limit

Other

100

X-Ratelimit-Remaining

Other

65

X-Ratelimit-Reset

Other

1771845500

X-Served-By

Other

cache-iad-kjyo7100119-IAD, cache-lga21939-LGA

date: Mon, 23 Feb 2026 11:05:41 GMT
via: 1.1 varnish, 1.1 varnish
x-cache: MISS, MISS
x-cache-hits: 0, 0
x-dns-prefetch-control: off
x-download-options: noopen
x-fastly-request-id: 50a565a238b32c9a211e17a334d8ab68df29550a
x-github-backend: Kubernetes
x-github-request-id: 2136:3655CF:2ED254:33EAFC:699C347A
x-permitted-cross-domain-policies: none
x-ratelimit-limit: 100
x-ratelimit-remaining: 65
x-ratelimit-reset: 1771845500
x-served-by: cache-iad-kjyo7100119-IAD, cache-lga21939-LGA

Recommendations

Enable compression (gzip/brotli) to improve performance