semanticscholar.org
Semantic Scholar | AI-Powered Research Tool
Last scanned Jul 18, 2026, 8:49 PM
Overall score
Great
Top issues to fix
6 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
2 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Summary
Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research. This website uses Nginx hosted on AWS behind CloudFront CDN. SEO is good (80/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance good (85/100). Top issue: No H1 heading found.
SEO
2 issue(s) found
Performance
484 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Meta tags
- Title
- Semantic Scholar | AI-Powered Research Tool
- Description
- Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research.
- Canonical
- https://www.semanticscholar.org/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1
- Robots meta
- noarchive
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- AWS
- CDN provider
- CloudFront
- IP address
- 18.239.153.89
- ASN
- AS16509 (AMAZON-02 - Amazon.com, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Amazon
- Subject
- *.semanticscholar.org
- Valid from
- Jan 7, 2026
- Valid to
- Feb 4, 2027
- Days until expiry
- 201
- SAN domains
- *.semanticscholar.org, *.semanticscholar.com, s2.allenai.org, *.s2.allenai.org, semanticscholar.org, semanticscholar.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 0 · H2 2 · H3 7
Links
17 internal · 10 external · 0 broken
Images
1 total · 0 missing alt
Scripts / Styles
30 scripts · 3 stylesheets
JS / CSS size
2.0 MB · 158 KB
Page size
183 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 8
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- No H1 heading found
- No structured data (JSON-LD) found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://semanticscholar.org
- Final URL
- https://www.semanticscholar.org/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 481 ms
- HTML size
- 183 KB
- Redirect chain
- https://semanticscholar.org → https://www.semanticscholar.org/
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Frequently asked questions
- What technology does semanticscholar.org use?
- semanticscholar.org is built with Google Analytics, Google Ads, Nginx.
- Is semanticscholar.org secure (HTTPS)?
- Yes. semanticscholar.org uses TLS 1.3 with a certificate issued by Amazon, valid until Feb 4, 2027.
- Who hosts semanticscholar.org?
- semanticscholar.org is hosted on AWS, behind CloudFront CDN.
- What is semanticscholar.org's SEO score?
- semanticscholar.org scored 80/100 for SEO in the latest analysis (great).
- What is semanticscholar.org's overall website score?
- semanticscholar.org has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card