How is nfse.gov.br?

Be careful risk 20/100

Registered 9 years ago, no valid HTTPS certificate, the site did not answer (OSError).

Why

02050100

finecarefulhigh risk

+20No valid HTTPS certificate.

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

Site

down

OSError

HTTPS

invalid

Could not resolve host (ENODATA)

Age

9 years

registered 2017-10-31

Blocklists

listings across 2 lists

Everything we looked at

DNS records2 record types

NS	spo2.serpro.gov.br bsa2.serpro.gov.br spo1.serpro.gov.br bsa1.serpro.gov.br
TXT	globalsign-domain-verification=8BA972E1DC86B6641FB1394ACE910343 dtm-domain-verification=4mYadXMkoom3q5T516gbmOpO0hujC4At6pCC_BReKXI

Registrationregistrar not reported

registered	2017-10-31
last changed	2020-06-08
country	BR
nameservers	bsa1.serpro.gov.br bsa2.serpro.gov.br spo1.serpro.gov.br spo2.serpro.gov.br
status	active

HTTPS certificatenot valid

valid	no
problem	Could not resolve host (ENODATA)

DNSSECinsecure

Domain is not signed with DNSSEC

. → br → gov.br → nfse.gov.br

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 D · 100/190

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

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

Advanced Security

10/25missing: Mail Server Configuration, IPv6 Support

Domain Reputation

35/35

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 2 lookups

SURBL MultidomainURIBL Multidomain

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=nfse.gov.br" \ -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=nfse.gov.br"

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

Watch nfse.gov.br. 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