Vendor Security Assessment
Automate third-party risk evaluation for supply chain security
Third-party vendors introduce security risks to your organization. EdgeDNS enables rapid, automated security assessments of vendor domains to identify risks before they become breaches.
The Challenge
Organizations rely on dozens to hundreds of third-party vendors, each representing potential security risks. Manual vendor security assessments are time-consuming, inconsistent, and often outdated by the time they are completed. Security questionnaires provide self-reported data that may not reflect actual security posture.
The Solution
Use EdgeDNS to automatically assess vendor security posture by analyzing their public-facing infrastructure. Check SSL/TLS configuration, security headers, email authentication, and overall trust scores to identify high-risk vendors requiring deeper review.
Endpoints Used
Combine these EdgeDNS endpoints to build this solution.
/v1/score/securityTry in PlaygroundSecurity Score: Get overall security grade with detailed breakdown
/v1/score/trustTry in PlaygroundTrust Score: Evaluate domain reputation and risk factors
/v1/security/headersTry in PlaygroundSecurity Headers: Audit CSP, HSTS, and other protective headers
/v1/domain/sslTry in PlaygroundSSL Certificate: Verify certificate validity and configuration
/v1/score/emailTry in PlaygroundEmail Score: Check SPF, DKIM, DMARC implementation
Results You Can Achieve
Vendor security baseline in one API call
Replace the multi-day questionnaire-and-followup loop with a public-signal snapshot covering headers, TLS, email auth, and CT-log certificate history.
Re-assess vendors on a fixed cadence
Scheduled monthly or weekly re-scans surface posture drift between vendor renewals — the gap where most TPRM programs go blind.
Objective evidence to compare with self-attestation
Public-signal data points sit alongside the vendor’s own SOC 2 / ISO answers, so disputed claims have an external check.
Code Example
Assess vendor security posture
async function assessVendorSecurity(vendorDomain) {
const headers = { 'Authorization': 'Bearer YOUR_API_KEY' };
const [security, trust, secHeaders, ssl, email] = await Promise.all([
fetch(`https://api.edgedns.dev/v1/score/security?domain=${vendorDomain}`, { headers }),
fetch(`https://api.edgedns.dev/v1/score/trust?domain=${vendorDomain}`, { headers }),
fetch(`https://api.edgedns.dev/v1/security/headers?url=https://${vendorDomain}`, { headers }),
fetch(`https://api.edgedns.dev/v1/domain/ssl?domain=${vendorDomain}`, { headers }),
fetch(`https://api.edgedns.dev/v1/score/email?domain=${vendorDomain}`, { headers }),
].map(p => p.then(r => r.json())));
// Calculate risk level based on scores
const gradeRank = { 'A': 1, 'B': 2, 'C': 3, 'D': 4, 'F': 5 };
const avgRank = (gradeRank[security.data.grade] + gradeRank[email.data.grade]) / 2;
const riskLevel = avgRank <= 2 ? 'low' : avgRank <= 3 ? 'medium' : 'high';
return {
vendor: vendorDomain,
securityGrade: security.data.grade,
trustScore: trust.data.score,
emailGrade: email.data.grade,
riskLevel,
requiresReview: riskLevel === 'high'
};
}Learn More
Explore industry standards and best practices related to this use case.
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