How is supabase.co?

Looks fine risk 0/100

Registered 7 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 145 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

145 ms · ends at supabase.com

HTTPS

50 d

left on a Let's Encrypt certificate

Age

7 years

registered 2020-01-11

Blocklists

listings across 5 lists

Everything we looked at

DNS records3 record types

A	76.76.21.21
NS	neil.ns.cloudflare.com christina.ns.cloudflare.com
TXT	v=spf1 -all google-site-verification=kr1_MTzG4MCq4VxtETAWa7SMl99ndMiqdk2SKdRCH9k

RegistrationGANDI SAS

registrar	GANDI SAS
registered	2020-01-11
last changed	2026-10-13
owner	hidden by privacy service
country	AU
nameservers	christina.ns.cloudflare.com neil.ns.cloudflare.com
status	clientTransferProhibited http://www.icann.org/epp#clientTransferProhibited

HTTPS certificate50 days left

valid	yes
issuer	Let's Encrypt
covers	supabase.co
protocol	TLSv1.3

issued 2026-09-18expires 2026-12-17

DNSSECinsecure

Domain is not signed with DNSSEC

. → co → supabase.co

Email authenticationfair

SPF	pass `v=spf1 -all`
DMARC	pass policy reject
DKIM	none of 20 common selectors

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

Security scoregrade C · 140/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

30/45missing: CAA Records, 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 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=supabase.co" \ -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=supabase.co"

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

Watch supabase.co. 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