How is appcenter.ms?

Looks fine risk 0/100

Registered 9 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 69 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

69 ms

HTTPS

94 d

left on a Microsoft Corporation certificate

Age

9 years

registered 2017-10-17

Blocklists

listings across 5 lists

Everything we looked at

DNS records5 record types

A	150.171.109.77
MX	0 microsoft-com.mail.protection.outlook.com
NS	ns3-05.azure-dns.org ns4-05.azure-dns.info ns2-05.azure-dns.net ns1-05.azure-dns.com
TXT	google-site-verification=3OLIyaJWDhZ5yw1X_NMyczH1JRmmcsZ6sQfTC_U4Ptg v=spf1 include:spf.protection.outlook.com -all facebook-domain-verification=o4z44drz6edvkxo327aw81ssb7x9um MS=ms65805949
CAA	{'type': 'CAA', 'issue': 'microsoft.com', 'critical': 0} {'type': 'CAA', 'issue': 'digicert.com', 'critical': 0} {'type': 'CAA', 'critical': 0, 'contactemail': 'caarecordaware@microsoft.com'} {'type': 'CAA', 'iodef': 'mailto:caarecordaware@microsoft.com', 'critical': 0}

RegistrationMarkMonitor

registrar	MarkMonitor
registered	2017-10-17
expires	2027-10-17
last changed	2026-09-15
nameservers	ns1-05.azure-dns.com ns2-05.azure-dns.net ns3-05.azure-dns.org ns4-05.azure-dns.info
status	client transfer prohibited client update prohibited client delete prohibited DS automation disabled NS automation disabled

registered 2017-10-17expires 2027-10-17

HTTPS certificate94 days left

valid	yes
issuer	Microsoft Corporation
covers	appcenter.ms, openapi.appcenter.ms
protocol	TLSv1.3

issued 2026-10-22expires 2027-01-30

DNSSECinsecure

Domain is not signed with DNSSEC

. → ms → appcenter.ms

Email authenticationgood

SPF	pass `v=spf1 include:spf.protection.outlook.com -all`
DMARC	pass policy reject
DKIM	none of 1 common selectors

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

Security scoregrade A · 175/205

Basic Security

20/40missing: DNSSEC Enabled

Record Security

45/45missing: DKIM Presence

Advanced Security

15/25missing: Mail Server Configuration, IPv6 Support

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop150.171.109.118Barracuda150.171.109.118UCEPROTECT Level 1150.171.109.118

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=appcenter.ms" \ -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=appcenter.ms"

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

Watch appcenter.ms. 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