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https://cursor.sh

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
89
GRADE
B
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Madrid, Spain
308 Permanent Redirect
Checks
9
6 PASS 3 REVIEW
C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
TLS Certificate Expiry & Recommendations
32 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

32
days left
0d 30d 60d 90d+

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
B
CDN & Delivery
Vercel
REVIEW
Vercel
Info::
Site is served via Vercel CDN
Got: x-vercel-id: cdg1::xnqkb-1776362555150-0897db03a5bf
CDN Detected: Vercel
Provider Vercel Evidence x-vercel-id: cdg1::xnqkb-1776362555150-0897db03a5bf
A+
DNS Records
1 A records, 36 ms lookup
PASS
1 A records, 36 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 76.76.21.21
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1554.awsdns-02.co.uk, ns-896.awsdns-48.net, ns-1143.awsdns-14.org, ns-70.awsdns-08.com
Info::
5 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 36 ms
Got: 36 ms
A76.76.21.21
AAAA—
CNAME—
NSns-1554.awsdns-02.co.uk, ns-896.awsdns-48.net, ns-1143.awsdns-14.org, ns-70.awsdns-08.com
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
TXT
SPF v=spf1 include:_spf.google.com ~all
google-site-verification=C1TncBZ0C00dMCHHosS_vTyRPM02dJCJsKN2zkcfFZ0
CAALookup not available with standard resolver
Resolved in 36 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A
Redirect Chain
1 redirect(s), 196 ms total
PASS
1 redirect(s), 196 ms total
Info::
Single redirect
Got: https://cursor.sh → https://cursor.com/ (308)
Info::
Cross-domain redirect detected

https://cursor.sh

87 ms · HTTP/1.1

308

https://cursor.com/

109 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://cursor.sh30887 msHTTP/1.1Vercel
2https://cursor.com/200109 msHTTP/1.1Vercel

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 3 URLs
PASS
robots.txt present, sitemap with 3 URLs
Info::
robots.txt is present
Got: 1106 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 3 entries
Info::
Sitemap index with 3 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1106 B Sitemaps referenced 2 User-agents * Blocking No — crawling allowed
# *
User-agent: *
Allow: /
Allow: /marketplace
Allow: /*/marketplace
Disallow: /api/
Disallow: /dashboard
Disallow: /*/dashboard
Disallow: /agents
Disallow: /*/agents
Disallow: /settings/
Disallow: /*/settings/
Disallow: /marketplace/publish$
Disallow: /*/marketplace/publish$
Disallow: /team/accept-invite
Disallow: /*/team/accept-invite
Disallow: /team/free-trial
Disallow: /team/new-team
Disallow: /*/team/new-team
Disallow: /verifyEmail
Disallow: /*/verifyEmail
Disallow: /failure
Disallow: /*/failure
Disallow: /loginDeepControl
Disallow: /*/loginDeepControl
Disallow: /loginDeepPage
Disallow: /*/loginDeepPage
Disallow: /pricing-history
Disallow: /*/pricing-history
Disallow: /artifacts/c/
Disallow: /artifacts/v/
Disallow: /marketing-static/
Disallow: /docs-static/
Disallow: /link/prompt
Disallow: /*/link/prompt
Disallow: /*/docs
Disallow: /*/docs/
Disallow: /*/learn
Disallow: /*/learn/
Disallow: /*/help
Disallow: /*/help/
Disallow: /*/for
Disallow: /*/for/

# Host
Host: https://cursor.com

# Sitemaps
Sitemap: https://cursor.com/sitemap_index.xml
Sitemap: https://forum.cursor.com/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 3 entries Valid XML Yes
Child Sitemaps:
A
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

308https://www.cursor.sh/
200https://cursor.sh/

HTTP → HTTPS

308http://cursor.sh/ → https://cursor.sh/

Use 301 (permanent) instead of 302 (temporary)

A+
Domain Intelligence
cursor.sh — via NameCheap, Inc., 3 years old, hosted on AWS
PASS
cursor.sh — via NameCheap, Inc., 3 years old, hosted on AWS
Info::
Domain registered until Apr 5, 2027 (11 months remaining)
Info::
Registrar: NameCheap, Inc.
Info::
Registrar lock is enabled
Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

265 days

April 5, 2027

SSL certificate

32 days

Issued by Let's Encrypt

Domain age

3 years

Registered April 5, 2023

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

76.76.21.21

Registrar

NameCheap, Inc.

Locked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar NameCheap, Inc.
Created April 5, 2023 (3 years ago)
Expires April 5, 2027 (11 months)
Last Updated March 11, 2026
Name Servers ns-896.awsdns-48.net, ns-70.awsdns-08.com, ns-1554.awsdns-02.co.uk, ns-1143.awsdns-14.org
Registrant Privacy service provided by Withheld for Privacy ehf
Hosting
IP Address 76.76.21.21
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: whois (1.7s)

Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.

Why this matters

Registrar lock (clientTransferProhibited et al.) prevents unauthorized domain transfers — strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 105 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
17 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
46 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
105 ms
Total Time Total request time from DNS lookup through full response.
106 ms

Connection waterfall

DNS Lookup 17 ms TCP Connect 1 ms TLS Handshake 46 ms Server Processing 41 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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