How is jsdelivr.net?

Be careful risk 20/100

Registered 14 years ago, on no blocklists we checked, no valid HTTPS certificate, the site did not answer (timed out).

Why

02050100

finecarefulhigh risk

+20No valid HTTPS certificate.

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

Site

down

timed out

HTTPS

invalid

Connection timed out

Age

14 years

registered 2012-05-16

Blocklists

listings across 5 lists

Everything we looked at

DNS records3 record types

A	1.2.3.4
NS	dns1.p08.nsone.net ns1.gcorelabs.net gns1.cloudns.net ns2.gcdn.services gns2.cloudns.net
TXT	google-site-verification=CvTdZ6pI_9DZf4kpmq5qI9wsyreNAKdAv90zMaeZc44 _globalsign-domain-verification=9Xqu2bonefjuoUF-XmyjAptAfuE-yStJz6wy9UnH-C

RegistrationAmazon Registrar, Inc.

registrar	Amazon Registrar, Inc.
registered	2012-05-16
expires	2027-05-16
last changed	2026-05-16
owner	c/o whoisproxy.com
nameservers	dns1.p08.nsone.net gns1.cloudns.net gns2.cloudns.net ns1.gcorelabs.net ns2.gcdn.services
status	client transfer prohibited

registered 2012-05-16expires 2027-05-16

HTTPS certificatenot valid

valid	no
problem	Connection timed out

DNSSECinsecure

Domain is not signed with DNSSEC

. → net → jsdelivr.net

Email authenticationpoor

SPF	none
DMARC	none
DKIM	none of 1 common selectors

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

Security scoregrade C · 120/205

Basic Security

20/40missing: DNSSEC Enabled

Record Security

0/45missing: CAA Records, SPF Record, DMARC Record, DKIM Presence

Advanced Security

5/25missing: Mail Server Configuration, SOA Record Configuration, IPv6 Support

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop1.2.3.4Barracuda1.2.3.4UCEPROTECT Level 11.2.3.4

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=jsdelivr.net" \ -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=jsdelivr.net"

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

Watch jsdelivr.net. 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