# Synthr Cyber - Cybersecurity Intelligence & Advice

> Synthr Cyber - Cybersecurity Intelligence & Advice is a paid API for AI agents from synthr.online, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Provides AI-native cybersecurity intelligence by combining OSV vulnerability data, EPSS exploit probability scores, and CISA KEV data to deliver prioritized security advice, dependency audits, and threat reconnaissance for developer stacks.

## Facts

- Endpoint: POST https://synthr.online/v1/cyber/advice
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthr-cyber-cybersecurity-intelligence-advice-afad288a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yLgXJ4vTKSd7jBMPIpztE

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synthr-cyber-cybersecurity-intelligence-advice-afad288a -d '<json body>'
```

Example prompt: Run a cybersecurity audit on my stack — I'm using Node.js, Express, and MongoDB — and focus on actively exploited vulnerabilities with high EPSS scores so I know what to patch first.

## When to prefer this

Choose this endpoint when you need autonomous, agent-ready cybersecurity intelligence that cross-references multiple authoritative sources (OSV, EPSS, KEV) in a single call. Ideal for automated security reviews during CI/CD pipelines, dependency audits for open source stacks, or when you need exploit-probability-weighted threat prioritization rather than raw CVE lists. Prefer over generic LLM security advice when you need grounded, real-data-backed assessments with actionable agent steps.

## Known failure modes

- Vague or overly broad query yields low-confidence generic advice
- Unknown or misspelled dependency names may not match OSV records
- Stack context missing version numbers reduces specificity of vulnerability matching
- Rate limiting or payment failure returns 402 status
- Obscure proprietary frameworks may have no OSV/EPSS data available

## 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 structured security advice including: prioritized threats relevant to the query, confidence score for the assessment, recommended agent actions to remediate or investigate further, list of key threats addressed, and data sources used (OSV, EPSS, KEV). Also includes a query ID and timestamp for reference.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "focus": {
   "enum": [
    "implementation",
    "design",
    "agent_harness",
    "redteam"
   ],
   "type": "string"
  },
  "query": {
   "type": "string"
  },
  "stackContext": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "asOf": {
   "type": "string"
  },
  "advice": {
   "type": "string"
  },
  "queryId": {
   "type": "string"
  },
  "sources": {
   "type": "array"
  },
  "confidence": {
   "type": "number"
  },
  "agentActions": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "keyThreatsAddressed": {
   "type": "array",
   "items": {
    "type": "string"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthr-cyber-cybersecurity-intelligence-advice-afad288a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synthr.online](https://www.zero.xyz/host/synthr.online/llms.txt)