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https://mercari.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
85
GRADE
B
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Santa Clara, United States
301 Moved Permanently
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
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.mercari.com/
200https://mercari.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://mercari.com/ → https://www.mercari.com/

Consistent

B
TLS Certificate Expiry & Recommendations
149 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

149
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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
A+
DNS Records
4 A records, 179 ms lookup
PASS
4 A records, 179 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 65.8.180.77, 65.8.180.6, 65.8.180.22, 65.8.180.112
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1366.awsdns-42.org, ns-1694.awsdns-19.co.uk, ns-73.awsdns-09.com, ns-947.awsdns-54.net
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: 179 ms
Got: 179 ms
A65.8.180.77, 65.8.180.6, 65.8.180.22, 65.8.180.112
AAAA—
CNAME—
NSns-1366.awsdns-42.org, ns-1694.awsdns-19.co.uk, ns-73.awsdns-09.com, ns-947.awsdns-54.net
MX
1 aspmx.l.google.com
5 alt2.aspmx.l.google.com
5 alt1.aspmx.l.google.com
10 aspmx3.googlemail.com
10 aspmx2.googlemail.com
TXT
C46CAC286C
MS=ms22694247
OPE0065548
_globalsign-domain-verification=eH00H1k_fqx6Z_MirxbIuqX9ZIKoh9AqxPPfCvF0ZI
_globalsign-domain-verification=jrwgwcxCsi-OETqrfVKaXd7AH8sJiUBvutKAuTuSz3
adobe-idp-site-verification=c933051d0803709140fd25ce0ed0264ec303043aef76093f8de0...
anthropic-domain-verification-dazyme=4zANLCcY4wTv6bTIdhLkXAeC3
anthropic-domain-verification-yvea1q=okQ9w80egtXgVxH2jlD9C8qqZ
apple-domain-verification=pUDci35VreV3lCVI
asv=5e78dc073dd04843bb668b94eb4864b2
atlassian-domain-verification=lPp9bmaf1GepSrMwT4p5MMbItWuAo4gknjVbXxpZaV937rTrqd...
atlassian-domain-verification=mv8zbdRxd2cwzpGhQjIwFxqMYGe6GoJjSjubzHb3FEP5Bxx1Cf...
brandland-domain-verification=_b92ee01c5f65b51ae5e4bba766f4510b
cursor-domain-verification-s4g6c3=onmGU62hlepcATY6dobfwJvMp
docusign=27114b1e-2930-4a58-be7f-7342e555c7f9
google-site-verification=006wYU0s30rg9XEuvXT0vxSXxEKCqy7gs29f1RufRhA
google-site-verification=05rufkCwwkIo6013PX3UZf50nITNgfem-YvFpbrDXs8
google-site-verification=C18P6UQEgnduDnYlxP5-OEoLEBTiNeFZ2vpYcc6t-ak
google-site-verification=FedHYmxWvrozUYQwbLwrZZzPBsMbQ0qrmqhj8a517O0
google-site-verification=I7hjORWTG7Nw1UG--xlHPg3-7JsLVSfuD4VaYyofDbQ
google-site-verification=S2R5nBzpotGrl-JACU3oKMseoh3u8AIqOxRv03MSw0g
google-site-verification=cpdCLCWpn5VmjkLvtUBxPzc5jhH659xhElevuz93SCU
google-site-verification=pANnrZym4toOSTS5PEMWiUDtdd-Oodqo1g2PkIZtBWc
google-site-verification=shEZeWOExNwSfczsQmG_eBpA-Bkaf34afGKUOyWHDmQ
google-site-verification=v6FcXe3f2gnvNK6gczVbyQBbxWMbx_PY2EVGk6Bz4Jc
jamf-site-verification=B6OEYi91W95-aG4V4CJzaA
miro-verification=d3c144c72fcb0a0e0e31606221144161ab956910
notion-domain-verification=nWJVYCtUKhvriEErfdVFviyIvcJY2w6RJU7c5Uy6vIY
onx=3586ec30-f158-40cb-91cb-50ab91326411
openai-domain-verification=dv-JW5fFfmC2K4lPuCxuWTVO5mN
stripe-verification=50114B06E0D2C263449D77F8D7022C8D10E7C38C6A40BCE8D210FB148DD7...
SPF v=spf1 include:_spf.google.com include:sendgrid.net include:mail.zendesk.com inc...
zapier-domain-verification-challenge=1100256d-b128-43ad-8e69-61ad78b99950
zoho-verification=zb59338760.zmverify.zoho.in
CAALookup not available with standard resolver
Resolved in 179 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.

A
Redirect Chain
1 redirect(s), 140 ms total
PASS
1 redirect(s), 140 ms total
Info::
Single redirect
Got: https://mercari.com → https://www.mercari.com/ (301)
Info::
WWW normalization redirect

https://mercari.com

58 ms · HTTP/1.1

301

https://www.mercari.com/

82 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://mercari.com30158 msHTTP/1.1AmazonS3
2https://www.mercari.com/20082 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 142 URLs
PASS
robots.txt present, sitemap with 142 URLs
Info::
robots.txt is present
Got: 1946 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 142 entries
Info::
Sitemap index with 142 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1946 B Sitemaps referenced 1 User-agents AdsBot-Google-Mobile, AdsBot-Google, Googlebot, PetalBot, facebookexternalhit, Twitterbot, YandexBot, Discordbot, Googlebot-Image, InstagramBot, Pinterestbot, LinkedInBot, *, WhatsApp, Slackbot Blocking No — crawling allowed
User-agent: AdsBot-Google-Mobile
Allow: /

User-agent: Googlebot-Image
Allow: /

User-agent: AdsBot-Google
Allow: /

User-agent: Googlebot
Disallow: /r/
Disallow: /tos/
Disallow: /privacy/
Disallow: /w9/
Disallow: /404/
Disallow: /500/
Disallow: /reauthenticate/
Disallow: /password/reset/
Disallow: /email_confirmation/done/
Disallow: /id_verification/
Disallow: /us/agreements/
Disallow: /security_notifications/feedback/
Disallow: /us/authorized-reseller/signup/
Disallow: /consent/
Disallow: /transaction/
Disallow: /sell/
Disallow: /us/selling/
Disallow: /u/
Disallow: /mypage/
Disallow: /notification-settings/
Disallow: /us/gift-card-exchange/
Disallow: /favorites/
Disallow: /news/
Disallow: /us/personal_data/
Disallow: /us/community/
Disallow: /jp/tos/
Disallow: /jp/privacy/
Disallow: /jp/tokutei/
Disallow: /jp/box/

User-agent: PetalBot
Disallow: /

User-agent: YandexBot
Disallow: /

User-agent: facebookexternalhit
Allow: /u/

User-agent: Discordbot
Allow: /u/

User-agent: Twitterbot
Allow: /u/

User-agent: InstagramBot
Allow: /u/

User-agent: WhatsApp
Allow: /u/

User-agent: Pinterestbot
Allow: /u/

User-agent: LinkedInBot
Allow: /u/

User-agent: Slackbot
Allow: /u/

User-agent: *
Disallow: /r/
Disallow: /tos/
Disallow: /privacy/
Disallow: /w9/
Disallow: /404/
Disallow: /500/
Disallow: /reauthenticate/
Disallow: /password/reset/
Disallow: /email_confirmation/done/
Disallow: /id_verification/
Disallow: /us/agreements/
Disallow: /security_notifications/feedback/
Disallow: /us/authorized-reseller/signup/
Disallow: /consent/
Disallow: /transaction/
Disallow: /sell/
Disallow: /us/selling/
Disallow: /u/
Disallow: /mypage/
Disallow: /notification-settings/
Disallow: /us/gift-card-exchange/
Disallow: /favorites/
Disallow: /news/
Disallow: /us/personal_data/
Disallow: /us/community/
Disallow: /jp/tos/
Disallow: /jp/privacy/
Disallow: /jp/tokutei/
Disallow: /jp/box/

Sitemap: https://www.mercari.com/us-sitemap-index.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 142 entries Valid XML Yes
Child Sitemaps:
A
Domain Intelligence
mercari.com — via MarkMonitor Inc., 22 years, 1 months old, hosted on AWS
PASS
mercari.com — via MarkMonitor Inc., 22 years, 1 months old, hosted on AWS
Warning::
Domain expires in 84 days
Consider enabling auto-renewal to prevent accidental expiration.
Got: Expires Jul 16, 2026
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: MarkMonitor 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

31 days

July 16, 2026

SSL certificate

149 days

Issued by Amazon

Domain age

22 years, 1 months

Registered July 16, 2004

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

65.8.180.112

Registrar

MarkMonitor Inc.

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the domain or enable auto-renewal to prevent accidental expiry
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar MarkMonitor Inc.
Created July 16, 2004 (22 years, 1 months ago)
Expires July 16, 2026 (2 months)
Last Updated June 14, 2025
Name Servers ns-1366.awsdns-42.org, ns-1694.awsdns-19.co.uk, ns-73.awsdns-09.com, ns-947.awsdns-54.net
DNSSEC Not enabled
Hosting
IP Address 65.8.180.112
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (0.2s)

Consider enabling auto-renewal to prevent accidental expiration.

Why this matters

Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.

Source: ICANN renewal policy

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 29 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
16 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.
6 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
30 ms
Total Time Total request time from DNS lookup through full response.
30 ms

Connection waterfall

DNS Lookup 16 ms TCP Connect 3 ms TLS Handshake 6 ms Server Processing 4 ms Content Transfer 0 ms
A+
CDN & Delivery
AWS CloudFront (Hit from cloudfront)
PASS
AWS CloudFront (Hit from cloudfront)
Info::
Site is served via AWS CloudFront CDN (edge: SFO53-P9)
Got: x-amz-cf-id: bwZStQvTaVxAzzU47wlKACmLDwA0n2BwA8_uvHc_YFJhWUshJadboA==
Info::
CDN cache status: Hit from cloudfront
CDN Detected: AWS CloudFront
Provider AWS CloudFront Cache Status Hit from cloudfront Evidence x-amz-cf-id: bwZStQvTaVxAzzU47wlKACmLDwA0n2BwA8_uvHc_YFJhWUshJadboA==
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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