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SGSiteGraph

tiger-algebra.com

ERROR: The request could not be satisfied

Last scanned Jul 26, 2026, 5:34 AM

79

Overall score

Fair

Summary

This website is hosted on AWS. SEO is fair (60/100) and accessibility is good (85/100). Security scores good (85/100) and performance excellent (90/100). Top issue: Missing meta description.

United States
Hosted on AWS

Top issues to fix

10 issues found · 3 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • Missing viewport meta tag

    Accessibility

    Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+4 more issues — details in the sections below.

60

SEO

6 issue(s) found

90

Performance

1.62 s

85

Security

HTTPS & header checks

85

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Meta tags

Title
ERROR: The request could not be satisfied
Description
Canonical
Language
Charset
iso-8859-1
Viewport
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider
AWS
CDN provider
CloudFront
IP address
3.160.196.66
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 3.160.196.66
  • 3.160.196.84
  • 3.160.196.60
  • 3.160.196.64
AAAA
  • 2600:9000:269b:7e00:1e:aff1:200:93a1
  • 2600:9000:269b:6400:1e:aff1:200:93a1
  • 2600:9000:269b:6000:1e:aff1:200:93a1
  • 2600:9000:269b:da00:1e:aff1:200:93a1
  • 2600:9000:269b:ae00:1e:aff1:200:93a1
  • 2600:9000:269b:6200:1e:aff1:200:93a1
  • 2600:9000:269b:3000:1e:aff1:200:93a1
  • 2600:9000:269b:4000:1e:aff1:200:93a1
MX—
TXT—
NS
  • ns-1028.awsdns-00.org
  • ns-588.awsdns-09.net
  • ns-1631.awsdns-11.co.uk
  • ns-62.awsdns-07.com
CAA—
CNAME
  • d1es7o15bvq7m0.cloudfront.net
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
www.tiger-algebra.com
Valid from
Apr 8, 2026
Valid to
Oct 22, 2026
Days until expiry
88
SAN domains
www.tiger-algebra.com, tiger-algebra.com

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyEnabled
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 1 · H3 0

Links

0 internal · 0 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 0 B

Page size

41.6 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing meta description
  • Missing canonical link
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • Missing <html lang> attribute
  • Missing viewport meta tag

Scan details

Requested URL
https://tiger-algebra.com
Final URL
https://www.tiger-algebra.com/en/
HTTP status
200
HTTP version
HTTP/2
Response time
1.62 s
HTML size
41.6 KB
Redirect chain
https://tiger-algebra.com → https://www.tiger-algebra.com/ → https://www.tiger-algebra.com/en/

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Frequently asked questions

What technology does tiger-algebra.com use?
We did not detect any specific technologies for tiger-algebra.com in the latest scan.
Is tiger-algebra.com secure (HTTPS)?
Yes. tiger-algebra.com uses TLS 1.3 with a certificate issued by Amazon, valid until Oct 22, 2026.
Who hosts tiger-algebra.com?
tiger-algebra.com is hosted on AWS, behind CloudFront CDN.
What is tiger-algebra.com's SEO score?
tiger-algebra.com scored 60/100 for SEO in the latest analysis (fair).
What is tiger-algebra.com's overall website score?
tiger-algebra.com has an overall SiteGraph score of 79/100, combining SEO, performance, security, and accessibility.