Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 104.26.11.200 |
| Server Software | cloudflare |
| CDN | Cloudflare |
| Compression | gzip |
|
🔒 🟡 Mixed Content (5 HTTP resources) | The page is served over HTTPS but loads 5 resource(s) over HTTP. This may be blocked in modern browsers. |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 104.26.11.200
Server Software cloudflare
CDN Cloudflare
Compression gzip
🔒 🟡 Mixed Content (5 HTTP resources) The page is served over HTTPS but loads 5 resource(s) over HTTP. This may be blocked in modern browsers.
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://sagemath.org:443 | 301 | HTTP/2 301 |
| 2 | http://www.sagemath.org/ | 301 | HTTP/1.1 301 Moved Permanently |
| 3 | https://www.sagemath.org/ | 200 | HTTP/2 200 |
#1 URL https://sagemath.org:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL http://www.sagemath.org/
HTTP Status Code 301
Status HTTP/1.1 301 Moved Permanently
#3 URL https://www.sagemath.org/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 0.6 ms |
| TCP Connect | 9.5 ms |
| TLS Handshake | 13.5 ms |
| Time To First Byte (TTFB) | 137.3 ms |
| Content Download | 0.2 ms |
| Total Response Time | 137.5 ms |
DNS Lookup 0.6 ms
TCP Connect 9.5 ms
TLS Handshake 13.5 ms
Time To First Byte (TTFB) 137.3 ms
Content Download 0.2 ms
Total Response Time 137.5 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | SageMath - Open-Source Mathematical Software System |
| Open Graph Title | SageMath Mathematical Software System - Sage |
| Open Graph Description | SageMath is a free and open-source mathematical software system. |
| Open Graph Image | https://sagemath.org/pix/logo_sagemath+icon_oldstyle.png |
Title SageMath - Open-Source Mathematical Software System Open Graph Title SageMath Mathematical Software System - Sage Open Graph Description SageMath is a free and open-source mathematical software system. Open Graph Image https://sagemath.org/pix/logo_sagemath+icon_oldstyle.png Detected Technologies
| Technology | jQuery Google Analytics Cloudflare |
Technology jQuery Google Analytics Cloudflare
HTTP Headers
| Date
| Wed, 22 Jul 2026 01:54:49 GMT |
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Meta Tags
| X-UA-Compatible | IE=edge,chrome=1 |
| Content-type | text/html; charset=utf-8 |
| Viewport | width=device-width, initial-scale=1.0 |
Date Wed, 22 Jul 2026 01:54:49 GMT
Content-type text/html; charset=utf-8
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Last-modified Thu, 07 May 2026 16:06:22 GMT
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