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https://vercel.app

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
83
GRADE
B
FIX
0
REVIEW
4
PASS
5
INFO
0
Probed from Santa Clara, United States
308 Permanent Redirect
Checks
9
5 PASS 4 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

C
Crawlability
Action
robots.txt present, sitemap with 0 URLs
REVIEW
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Warning::
sitemap.xml contains invalid XML
Search engines may not be able to parse the sitemap. Fix XML validation errors.
Warning::
sitemap.xml is empty — no URLs found
An empty sitemap provides no value. Add <url> entries for your pages.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.

Learn more ▾

Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.

Source: sitemaps.org / Google Search Central

An empty sitemap provides no value. Add <url> entries for your pages.

Why this matters

An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.

Learn more ▾

Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.

Source: Google Search Central / sitemaps.org

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 10240 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed
<!DOCTYPE html><html data-dpl-id="dpl_Ef3epGPA3oEw6TzH9acJV2uZCviw" class="geist_mono_98cac566-module__bcNCwW__className geist_1620151b-module__2VSEvG__className geist_mono_98cac566-module__bcNCwW__variable geist_1620151b-module__2VSEvG__variable" lang="en"><head><meta charSet="utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/><link rel="preload" href="/vc-ap-vercel-marketing/_next/static/immutable/media/797e433ab948586e.p.3f30ggp2vw8zj.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="preload" href="/vc-ap-vercel-marketing/_next/static/immutable/media/GeistPixel_Circle.p.0jixsyww9kd4y.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="preload" href="/vc-ap-vercel-marketing/_next/static/immutable/media/GeistPixel_Grid.p.30wdobjl9hgxl.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="preload" href="/vc-ap-vercel-marketing/_next/static/immutable/media/GeistPixel_Line.p.0rlph12vacpf4.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="preload" href="/vc-ap-vercel-marketing/_next/static/immutable/media/GeistPixel_Square.p.2k-0ab8oywfv4.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="preload" href="/vc-ap-vercel-marketing/_next/static/immutable/media/GeistPixel_Triangle.p.0qs0n6zg5c5u1.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="preload" href="/vc-ap-vercel-marketing/_next/static/immutable/media/caa3a2e1cccd8315.p.400zotvijr2rn.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/runway-light.0_1l12ke61ums.svg"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/runway-dark.1anio3luprqa2.svg"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/leonardo-ai-light.33rurcgq77tyi.svg"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/leonardo-ai-dark.0n04u0ze4qgvg.svg"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/zapier-light.1mik6pqvmlto_.svg"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/zapier-dark.2jinjef-7qh6t.svg"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/arrow-right.27jx3s6fu89zy.svg"/><link rel="preload" as="image" href="/vc-ap-vercel-marketing/_next/static/immutable/media/chevron-circle-right-fill.3c2nf59jn_1cn.svg"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0izpoguyenja8.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0k5fn5mrbarjn.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/23ye7m750-1d0.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2wxwcs_h05udr.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/3qrce6k2r1w7-.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2zajbvsm-en85.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/085xcg9gz-voi.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1wdd5-3dohmnh.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0oohemj2htt9-.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1uw1dgdf8jkn6.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/3tv7kasw9qyea.css" data-precedence="next"/><link rel="stylesheet" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0xolr114xxwtc.css" data-precedence="next"/><link href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2ogbg8axdy3li.css" rel="stylesheet" as="style" data-precedence="dynamic"/><link rel="preload" as="script" fetchPriority="low" href="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2nn2f3afo1o75.js"/><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/384yby324pedc.js" async=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/06_lns4u-88bb.js" async=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2e0m6jqy7ljly.js" async=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/224jpx-a22x9e.js" async=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1-65qcxzqctbe.js" async=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/turbopack-3kkj1_nyskvsd.js" async=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1ujwh0o3kp_4o.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1p3mwvsp0r5k4.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0yul-944xrh9z.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0lgs14is1rwl6.js" async=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0xg7s536iugmi.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/3im29c78byzdr.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/170c0ouxlxxmf.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1kfedvnyp31i8.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2jtde7k6ezf7v.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1l-4u1_f4ddv9.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2tccjpfiye8xr.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1me_i5aoqa8of.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0deuqelrbfvrm.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1fesoc1q7e3m4.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/3fgq9hsg2y88p.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/44eio6kx2n-on.js" async="" crossorigin=""></script><script 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src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/34048cbrjc1ye.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0a_cv0w-_jvdz.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/01zc6ca_o3p4m.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/3mm19j3ia9zba.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/13atrcwey96d2.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0p4kaafh2wtb5.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1xwg-6kkipjgj.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1nj6mvy5zl9j2.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0ujsk3yx7vhm7.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/2g0iixaa64x0_.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0n6ic3rdhk35v.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0fp_d96x8-js3.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/0idriya_ho1bn.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/40ficuflzi00z.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/36vtpq2ngujfl.js" async="" crossorigin=""></script><script src="/vc-ap-vercel-marketing/_next/static/immutable/chunks/1lwuj_6j99xyx.js" async="" crossorigin=""></script><script 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sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML No
B
TLS Certificate Expiry & Recommendations
35 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

35
days left
0d 30d 60d 90d+

Recommended actions

  • Submit your domain to hstspreload.org to be added to the Chrome preload list
  • 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: sfo1::gbxbp-1776798043395-2a18cc48fce0
CDN Detected: Vercel
Provider Vercel Evidence x-vercel-id: sfo1::gbxbp-1776798043395-2a18cc48fce0
A+
DNS Records
2 A records, 8 ms lookup
PASS
2 A records, 8 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 64.29.17.131, 216.198.79.131
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns1.vercel-dns-3.com, ns2.vercel-dns-3.com, ns3.vercel-dns-3.com, ns4.vercel-dns-3.com
Info::
No MX records — email not configured via DNS
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
No SPF record found in TXT records
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Info::
DNS resolution time: 8 ms
Got: 8 ms
A64.29.17.131, 216.198.79.131
AAAA—
CNAME—
NSns1.vercel-dns-3.com, ns2.vercel-dns-3.com, ns3.vercel-dns-3.com, ns4.vercel-dns-3.com
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 8 ms

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.

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more ▾

SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.

Source: RFC 7208 (SPF)

A
Redirect Chain
1 redirect(s), 90 ms total
PASS
1 redirect(s), 90 ms total
Info::
Single redirect
Got: https://vercel.app → https://vercel.com (308)
Info::
Cross-domain redirect detected

https://vercel.app

25 ms · HTTP/1.1

308

https://vercel.com

65 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://vercel.app30825 msHTTP/1.1Vercel
2https://vercel.com20065 msHTTP/1.1Vercel

See the visual redirect chain in the HTTP Probe tab →

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.vercel.app/
200https://vercel.app/

HTTP → HTTPS

308http://vercel.app/ → https://vercel.app/

Use 301 (permanent) instead of 302 (temporary)

A+
Domain Intelligence
vercel.app — via Tucows Domains Inc, 6 years, 3 months old, hosted on AWS
PASS
vercel.app — via Tucows Domains Inc, 6 years, 3 months old, hosted on AWS
Info::
Domain registered until Jan 28, 2036 (9 years, 10 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: Tucows Domains Inc
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

3487 days

January 28, 2036

SSL certificate

35 days

Issued by Google Trust Services

Domain age

6 years, 3 months

Registered January 28, 2020

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

64.29.17.67

Registrar

Tucows Domains Inc

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar Tucows Domains Inc
Created January 28, 2020 (6 years, 3 months ago)
Expires January 28, 2036 (9 years, 10 months)
Last Updated March 14, 2026
Name Servers ns1.vercel-dns-3.com, ns2.vercel-dns-3.com, ns3.vercel-dns-3.com, ns4.vercel-dns-3.com
DNSSEC Not enabled
Hosting
IP Address 64.29.17.67
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (0.2s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 33 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.
3 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
9 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
33 ms
Total Time Total request time from DNS lookup through full response.
34 ms

Connection waterfall

DNS Lookup 17 ms TCP Connect 3 ms TLS Handshake 9 ms Server Processing 5 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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