Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.BCrawlabilityno robots.txt, no sitemapREVIEW
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.
Learn more ▾ ▴
A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.
Source: robotstxt.org
A sitemap helps search engines discover and index your pages more efficiently.
No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.
Learn more ▾ ▴
A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.
Source: sitemaps.org / Google Search Central
No robots.txt found
This is fine for most sites — a missing robots.txt allows all crawling by default.
No sitemap found
Adding a sitemap helps search engines discover your pages.
BTLS Certificate Expiry & Recommendations58 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
Recommended actions
- Add includeSubDomains to the HSTS directive
- Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
- Enable DNSSEC on your domain for DNS spoofing protection
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
ADNS Records2 A records, 5114 ms lookupPASS
| A | 104.18.20.144, 104.18.21.144 |
| AAAA | 2606:4700::6812:1590, 2606:4700::6812:1490 |
| CNAME | — |
| NS | tate.ns.cloudflare.com, stevie.ns.cloudflare.com |
| MX | 10 eforward2.registrar-servers.com 10 eforward3.registrar-servers.com 10 eforward1.registrar-servers.com 15 eforward4.registrar-servers.com 20 eforward5.registrar-servers.com |
| TXT | ALIAS for jestjs.netlify.app SPF v=spf1 include:spf.efwd.registrar-servers.com ~all |
| CAA | Lookup not available with standard resolver |
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
Slow DNS adds latency to every page load. Consider a faster DNS provider.
DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.
Source: DNS performance benchmarks
A+Redirect ChainNo redirects — direct accessPASS
https://jestjs.io
75 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://jestjs.io | 200 | 75 ms | HTTP/1.1 | cloudflare |
A+IPv6 ReadinessIPv6 reachable (1 ms)PASS
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
ADomain Intelligencejestjs.io — via 1API GmbH, 7 years, 10 months oldPASS
10 days
June 25, 2026
58 days
Issued by Google Trust Services
7 years, 10 months
Registered June 25, 2018
Status unknown
Protects against DNS spoofing
Unknown
2606:4700::6812:1590
1API GmbH
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
Consider enabling auto-renewal to prevent accidental expiration.
Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.
Source: ICANN renewal policy