How is workers.dev?

Looks fine risk 0/100

Registered 8 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 122 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

122 ms · ends at www.cloudflare.com

HTTPS

35 d

left on a Google Trust Services certificate

Age

8 years

registered 2019-02-08

Blocklists

listings across 5 lists

Everything we looked at

DNS records4 record types

A	104.18.12.15 104.18.13.15
AAAA	2606:4700::6812:c0f 2606:4700::6812:d0f
NS	sofia.ns.cloudflare.com clyde.ns.cloudflare.com
TXT	v=spf1 -all

RegistrationCloudFlare, Inc.

registrar	CloudFlare, Inc.
registered	2019-02-08
expires	2027-02-08
last changed	2025-11-16
owner	DATA REDACTED
nameservers	clyde.ns.cloudflare.com sofia.ns.cloudflare.com
status	client delete prohibited client transfer prohibited client update prohibited

registered 2019-02-08expires 2027-02-08

HTTPS certificate35 days left

valid	yes
issuer	Google Trust Services
covers	workers.dev, *.workers.dev
protocol	TLSv1.3

issued 2026-09-01expires 2026-11-30

DNSSECinsecure

Domain is not signed with DNSSEC

. → dev → workers.dev

Email authenticationfair

SPF	pass `v=spf1 -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 B · 150/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

30/45missing: CAA Records, DKIM Presence

Advanced Security

15/25missing: Mail Server Configuration

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 8 lookups

SURBL MultidomainURIBL MultidomainSpamCop104.18.13.15Barracuda104.18.13.15UCEPROTECT Level 1104.18.13.15SpamCop104.18.12.15Barracuda104.18.12.15UCEPROTECT Level 1104.18.12.15

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=workers.dev" \ -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=workers.dev"

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

Watch workers.dev. 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