unpaywall.org
Unpaywall
Last scanned Jul 26, 2026, 5:47 AM
Overall score
Fair
Summary
This website uses Express. SEO is fair (50/100) and accessibility is good (80/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.
Top issues to fix
12 issues found · 4 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.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+6 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
734 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Meta tags
- Title
- Unpaywall
- Description
- Canonical
- Language
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- unpaywall.org
- Valid from
- Jul 7, 2026
- Valid to
- Oct 5, 2026
- Days until expiry
- 68
- SAN domains
- unpaywall.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
0 internal · 0 external · 0 broken
Images
0 total · 0 missing alt
Scripts / Styles
2 scripts · 6 stylesheets
JS / CSS size
0 B · 0 B
Page size
1.4 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 H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
- Missing <html lang> attribute
Scan details
- Requested URL
- https://unpaywall.org
- Final URL
- https://unpaywall.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 734 ms
- HTML size
- 1.4 KB
- Redirect chain
- https://unpaywall.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does unpaywall.org use?
- unpaywall.org is built with Express, Node.js.
- Is unpaywall.org secure (HTTPS)?
- Yes. unpaywall.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 5, 2026.
- Who hosts unpaywall.org?
- Hosting provider information for unpaywall.org is not available yet.
- What is unpaywall.org's SEO score?
- unpaywall.org scored 50/100 for SEO in the latest analysis (fair).
- What is unpaywall.org's overall website score?
- unpaywall.org has an overall SiteGraph score of 72/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card