How is cursor.sh?

Looks fine risk 0/100

Registered 4 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 264 ms.

Why

02050100

finecarefulhigh risk

·Nothing in the checks added risk.

Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.

Site

200

264 ms · ends at cursor.com

HTTPS

87 d

left on a Let's Encrypt certificate

Age

4 years

registered 2023-04-05

Blocklists

listings across 5 lists

Everything we looked at

DNS records4 record types

A	76.76.21.21
MX	1 aspmx.l.google.com 10 alt3.aspmx.l.google.com 10 alt4.aspmx.l.google.com 5 alt1.aspmx.l.google.com 5 alt2.aspmx.l.google.com
NS	ns-1143.awsdns-14.org ns-1554.awsdns-02.co.uk ns-70.awsdns-08.com ns-896.awsdns-48.net
TXT	apple-domain-verification=hlprRbrsYhr91Bn9 cursor-domain-verification-2kmn02=aJPOd4v8HEjWIWV6sZETbdiaJ google-site-verification=-X1sqjbAKGAL5WUXD-zZcknRb_uwNJNVC0As4likEoA google-site-verification=C1TncBZ0C00dMCHHosS_vTyRPM02dJCJsKN2zkcfFZ0 v=spf1 include:_spf.google.com ~all

RegistrationNameCheap, Inc.

registrar	NameCheap, Inc.
registered	2023-04-05
expires	2027-04-05
last changed	2026-08-12
owner	Privacy service provided by WITHHELD FOR PRIVACY LLC
nameservers	ns-896.awsdns-48.net ns-70.awsdns-08.com ns-1554.awsdns-02.co.uk ns-1143.awsdns-14.org
status	client transfer prohibited

registered 2023-04-05expires 2027-04-05

HTTPS certificate87 days left

valid	yes
issuer	Let's Encrypt
covers	cursor.sh
protocol	TLSv1.3

issued 2026-10-25expires 2027-01-23

DNSSECinsecure

Domain is not signed with DNSSEC

. → sh → cursor.sh

Email authenticationgood

SPF	pass `v=spf1 include:_spf.google.com ~all`
DMARC	warning policy none
DKIM	found: google, s1, s2

Whether mail claiming to be from this domain can be checked as genuine.

Security scoregrade B · 158/205

Basic Security

20/40missing: DNSSEC Enabled

Record Security

23/45missing: CAA Records, DMARC Record, DKIM Presence

Advanced Security

20/25missing: IPv6 Support

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop76.76.21.21Barracuda76.76.21.21UCEPROTECT Level 176.76.21.21

Green: clean. Red: listed. Grey: the list did not answer.

Ask it yourself

Agents get this as data. Bought through the API, the checks behind this page cost $0.070: profile $0.025 + trust $0.020 + screenshot $0.020 + site status $0.005.

curl "https://how.is/v1/domain/trust?domain=cursor.sh" \ -H "Authorization: Bearer $HOWIS_KEY" # or pay per call in USDC (x402), no key: the 402 tells your agent the price curl -i "https://how.is/v1/domain/profile?domain=cursor.sh"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on cursor.sh. Reference: /llms.txt.

Watch cursor.sh. DNS read at the source every 5 minutes; certificate, blocklists and expiry every 6 hours. You get an email only when something changes.

Watch — $1 / 30 days