A
Pass · 95/100
Demonstrates a solid security posture with minor gaps. Positive signals: DNS Configuration, Known Breaches, and TLS Configuration all passed. 1 action item identified, including 0 critical. The issues are configuration gaps, not architectural problems. A focused remediation effort of 1–2 days could address all findings.
Trust Score Trend
→ No change
1 scan · Last scanned February 18, 2026
Score
100
75
50
25
0
A
95/100
Compliance & Certifications
SOC 2 Type II
3rd party · AICPA
Pro subscribers only
ISO 27001
3rd party · accredited body
Pro subscribers only
GDPR
Self-reported
Pro subscribers only
CCPA
Self-reported
Pro subscribers only
Incident History
None in 12 months
March 2026
ChatGPT data exposure
1 source
Pro subscribers only
April 2023 – Feb 2026
ChatGPT data exposure
1 source
Pro subscribers only
Security Posture
1 item need attention
9 passed
Increase how long HSTS stays remembered
HSTS Header
This briefly reopens an interception window for returning visitors. HSTS is already turned on for opensea.io, which is good — but it's only set to be remembered for 0 day(s), well under the 6-month minimum that's considered safe. A short duration means a returning visitor's browser "forgets" the HTTPS-only rule quickly, briefly reopening the same risk HSTS is meant to close.
PCI-DSS 4.0Req 6.4.1
Application security header configuration
How to fix this
1Update the existing header to the value below (same place you originally added it). You're using Cloudflare in front of this site — add it there, see https://developers.cloudflare.com/rules/transform/response-header-modification/create-dashboard/.
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
2Confirm it's live: search "http header checker" and enter opensea.io.
View all 9 passed checks
DNS Configuration
Known Breaches
TLS Configuration
Security Headers
CVE Exposure
DMARC / Email Security
MX Records & Mail Provider
Certificate Hygiene
Subprocessors & Tech Stack
Company Signals
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Operational risk
Low
11 yrs operating. Well-funded
Lynxradar · Composite signal
Last funding
$40B
Series F · Mar 2025 · SoftBank-led
Crunchbase ↗
Employees
~3,000
+40% YoY growth
LinkedIn ↗
Trust Resources
Claim profile →
Trust Center
trust.opensea.io ↗
Security page
opensea.io/security ↗
Privacy Policy
opensea.io/privacy ↗
DPA (Data Processing Agreement)
opensea.io/dpa ↗
Updated recently
Subprocessors List
opensea.io/policies/subprocessors ↗
Tech Stack Detected
Subprocessors
CloudflareVercel
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