Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 207.241.234.205 |
| Server Software | nginx/1.30.3 |
| Compression | gzip |
|
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 207.241.234.205
Server Software nginx/1.30.3
Compression gzip
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://openlibrary.org:443 | 303 | HTTP/2 303 |
| 2 | https://openlibrary.org/verify_human?next=/ | 200 | HTTP/2 200 |
#1 URL https://openlibrary.org:443
HTTP Status Code 303
Status HTTP/2 303
#2 URL https://openlibrary.org/verify_human?next=/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 0.6 ms |
| TCP Connect | 139.2 ms |
| TLS Handshake | 178.5 ms |
| Time To First Byte (TTFB) | 519.6 ms |
| Content Download | 0.2 ms |
| Total Response Time | 519.8 ms |
DNS Lookup 0.6 ms
TCP Connect 139.2 ms
TLS Handshake 178.5 ms
Time To First Byte (TTFB) 519.6 ms
Content Download 0.2 ms
Total Response Time 519.8 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| Referrer Policy | no-referrer-when-downgrade |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
Referrer Policy no-referrer-when-downgrade
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Human Verification | Open Library |
| Meta Description | Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free. |
| Canonical | https://openlibrary.org/verify_human?next=%2F |
Title Human Verification | Open Library
Meta Description Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free.
Canonical https://openlibrary.org/verify_human?next=%2F
Detected Technologies
| Technology | Google Analytics Nginx PHP |
Technology Google Analytics Nginx PHP
HTTP Headers
| Server
| nginx/1.30.3 |
| Date
| Thu, 23 Jul 2026 22:30:47 GMT |
| Content-type
| text/html; charset=utf-8 |
| X-ol-stats
| "" |
| Content-encoding
| gzip |
| Vary
| Accept-Encoding |
| Referrer-policy
| no-referrer-when-downgrade |
Meta Tags
| Format-detection | telephone=no |
| Viewport | width=device-width, initial-scale=1.0 |
| Theme-color | #e2dcc5 |
| Google-site-verification | XYOJ9Uj0MBr6wk7kj1IkttXrqY-bbRstFMADTfEt354 |
| Msvalidate.01 | 8BEBECBEF537077737975A49D55B857D |
| Description | Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free. |
| Sentry-trace | 0b06fcd1b2dc422f8754706fa40f47cd-bca842e68d9bc017 |
| Baggage | sentry-trace_id=0b06fcd1b2dc422f8754706fa40f47cd,sentry-environment=production,sentry-release=29b531f,sentry-public_key=a27de9a317a64432866ac301a855f04e,sentry-sample_rate=0.02 |
Server nginx/1.30.3
Date Thu, 23 Jul 2026 22:30:47 GMT
Content-type text/html; charset=utf-8
X-ol-stats ""
Content-encoding gzip
Vary Accept-Encoding
Referrer-policy no-referrer-when-downgrade
