What powers 
metal3.io?
Last seen Aug 2026 · 18 technologies across 11 categories
Caching
Varnish
since Jul 2022
CDN
Font scripts
Font Awesome
since Jul 2022
Google Font API
since Jul 2022
JavaScript libraries
Clipboard.js
since Jul 2022
Highlight.js
since Sep 2023
Miscellaneous
Open Graph
since Oct 2022
RSS
since Dec 2022
PaaS
GitHub Pages
since Jul 2022
Netlify
since Sep 2023
Photo galleries
Security
Cloudflare Bot Management
since Mar 2025
HSTS
since Sep 2023
Segmentation
Adobe Audience Manager
since Sep 2024
Tag managers
Adobe Experience Platform Launch
since Jul 2022
Video players
YouTube
since Sep 2024
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Open Page Rank
4.19 / 10 · ranked #457,731 of all domains
43 referring domains · OpenPageRank
Page
- Language: English
- CDN: Fastly
- Weight: 1.9 MB · 48 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Fastly (185.199.108.153)
- DNS: Cloudflare DNS
- Email: no MX record returned
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 2,120,209, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| metal3.io | 15 |
| book.metal3.io | 6 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Bot Management May 2026
- dropped Cloudflare Bot Management Nov 2025