rcsb.org
RCSB PDB: Homepage
Last scanned Aug 1, 2026, 11:00 AM · 9 views
Overall score
Fair
Summary
As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. This website uses Express. SEO is fair (60/100) and accessibility is good (75/100). Security scores good (75/100) and performance excellent (90/100). Top issue: Meta description longer than 160 characters.
As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations relating to sequence, structure and function. These molecules are visualized, downloaded, and analyzed by users who range from students to specialized scientists.
Top issues to fix
12 issues found · 2 high priority
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.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
+6 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
233 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
-1 overall since Jul 25, 2026
- Overall
- 74
- SEO
- 60
- Security
- 75
- Performance
- 90
- Accessibility
- 75
Organization
Company details published in this site's own structured data.
As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations relating to sequence, structure and function. These molecules are visualized, downloaded, and analyzed by users who range from students to specialized scientists.
Contact
Email, phone, and address published on this site's own pages.
- info@rcsb.org
Meta tags
- Title
- RCSB PDB: Homepage
- Description
- As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations relating to sequence, structure and function. These molecules are visualized, downloaded, and analyzed by users who range from students to specialized scientists.
- Canonical
- Language
- en
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
- https://rcsb.org/manifest.json
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
- InCommon, LLC
- Subject
- www.rcsb.org
- Valid from
- Jul 16, 2026
- Valid to
- Jan 30, 2027
- Days until expiry
- 182
- SAN domains
- www.rcsb.org, rcsb.org, sierra.east.k8s.rcsb.org, sierra.k8s.rcsb.org, sierra.west.k8s.rcsb.org, www1.rcsb.org, www2.rcsb.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 3
Links
88 internal · 55 external · 20 broken
Images
90 total · 40 missing alt
Scripts / Styles
13 scripts · 8 stylesheets
JS / CSS size
12.8 KB · 1.9 KB
Page size
92.1 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- More than 20% of images are missing alt text
- No H1 heading found
Scan details
- Requested URL
- https://rcsb.org
- Final URL
- https://rcsb.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 232 ms
- HTML size
- 92.1 KB
- Redirect chain
- https://rcsb.org
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Frequently asked questions
- What technology does rcsb.org use?
- rcsb.org is built with Express, Node.js, Bootstrap, jQuery, Google Analytics.
- Is rcsb.org secure (HTTPS)?
- Yes. rcsb.org uses TLS 1.3 with a certificate issued by InCommon, LLC, valid until Jan 30, 2027.
- Who hosts rcsb.org?
- Hosting provider information for rcsb.org is not available yet.
- What is rcsb.org's SEO score?
- rcsb.org scored 60/100 for SEO in the latest analysis (fair).
- What is rcsb.org's overall website score?
- rcsb.org has an overall SiteGraph score of 74/100, combining SEO, performance, security, and accessibility.
- Has rcsb.org's score changed over time?
- rcsb.org's overall score has declined by 1 point (from 75 to 74) since Jul 25, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card