Synthr Cyber Stack Brief

x402

Synthr Cyber Stack Brief is a paid API for AI agents from synthr.online, paid per call via x402, $0.005/call, status down (last checked 2026-10-13).

Analyzes a software dependency stack against real OSV, EPSS, and KEV vulnerability data to produce a prioritized security risk brief for autonomous agents

Price / call$0.005

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How this service works

Agent-native cybersecurity intelligence. Real OSV + EPSS + KEV data. Stack briefs, dep audits, advice, web reconnaissance. Prioritized for autonomous builders and harnesses.

Output

Returns a structured security brief including a stack summary (packages analyzed, critical and high finding counts), a prioritized list of risks each with CVE ID, severity, EPSS score and percentile, KEV flag, agent surface description, patch priority rating, and recommended remediation actions, plus source citations, a confidence score, and a list of suggested next agent actions.

Example use cases

Pre-deployment dependency security audit

“Before we ship to production, run a security brief on our Node.js stack: express 4.18.2, axios 1.3.4, lodash 4.17.20, and jsonwebtoken 8.5.1 — flag anything that's in the CISA KEV list or has a high EPSS score.”

CI pipeline vulnerability gate check

“Audit our Python backend stack — Django 3.2.18, Pillow 9.0.1, cryptography 38.0.1 — and tell me if there are any critical findings I should block the build on.”

Open source project security posture review

“I'm maintaining an open source Rust + JavaScript project using actix-web 4.2.1 and react 17.0.2 with webpack 5.74.0 — give me a prioritized risk brief so I know what vulnerabilities to disclose to users.”

Technical details

Endpoint

POSThttps://synthr.online/v1/cyber/stack-brief?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need structured, agent-consumable vulnerability intelligence grounded in authoritative data sources (OSV, EPSS, CISA KEV) rather than a generic package audit. It is especially valuable when you need exploit-probability scoring (EPSS) and known-exploited flags (KEV) together with patch prioritization, making it ideal for autonomous CI/CD pipelines or security-aware agents that need to make automated decisions about deployment readiness.

Side effects

Missing required 'stack' field returns validation error
Unrecognized package names or versions may yield no vulnerability matches
Very new CVEs not yet in OSV/EPSS databases may be missed
Network timeout if upstream OSV or EPSS APIs are unavailable
Deeply nested or malformed stack objects may cause parsing errors

Input

Schema · Request body

Field	Type	Description
depth	string
stackrequired	object
context	string	Optional project context description

Output

Schema · Response

Field	Type	Description
asOf	string
queryId	string
sources	array
confidence	number
disclaimer	string
agentActions	array
stackSummary	object
prioritizedRisks	array

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