# SiteCheck Package Vulnerability Scanner

> SiteCheck Package Vulnerability Scanner is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).

Looks up known security vulnerabilities for a specific package version across npm, PyPI, crates.io, Go, or Maven ecosystems using the OSV database

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/vulns?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-package-vulnerability-scanner-06c14988
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bIPTLpyYutdqeJEklZDfw

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 sitecheck-package-vulnerability-scanner-06c14988
```

Example prompt: Can you check whether lodash version 4.17.20 on npm has any known security vulnerabilities, and tell me the severity and what version fixes each one?

## When to prefer this

Choose this endpoint when you need to check a specific, pinned version of a package against the OSV vulnerability database across major ecosystems (npm, PyPI, crates.io, Go, Maven). It is ideal for CI/CD pipelines, dependency audits before deployment, or agent-driven security reviews where the exact package coordinates are known. It uses OSV directly with no API key required, making it a lightweight, pay-per-call alternative to full SCA platforms.

## Known failure modes

- Missing required parameters (ecosystem, name, version) returns a validation error
- Unknown or misspelled ecosystem name may return no results or an error
- Package not found in the specified ecosystem returns empty vulnerability list
- OSV upstream unavailability may cause timeout or degraded response
- Incorrect version string format may return no matches even if vulnerabilities exist

## How this service works

Known vulnerabilities of one package version in the OSV database: npm, PyPI, crates.io, Go or Maven. Each advisory has its id, CVE aliases, summary, severity, fixed versions and a link. The count is the full number; up to 20 are listed.

## Output

Returns a JSON object containing the package name, version, ecosystem, total advisory count, timestamp, and an array of vulnerability objects. Each vulnerability includes its OSV/GHSA ID, a link to the full advisory, CVE aliases, the version(s) that fix the issue, a plain-English summary, and a severity rating (e.g. LOW, MODERATE, HIGH, CRITICAL).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "ecosystem",
      "name",
      "version"
     ],
     "properties": {
      "name": {
       "type": "string",
       "description": "Package name"
      },
      "version": {
       "type": "string",
       "description": "Exact version, e.g. 4.17.20"
      },
      "ecosystem": {
       "type": "string",
       "description": "npm, PyPI, crates.io, Go or Maven"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "lodash",
  "note": "Advisories that OSV lists for this exact version.",
  "count": 5,
  "source": "OSV (https://osv.dev), no API key",
  "version": "4.17.20",
  "checkedAt": "2026-10-14T04:49:24.880Z",
  "ecosystem": "npm",
  "vulnerabilities": [
   {
    "id": "GHSA-29mw-wpgm-hmr9",
    "link": "https://osv.dev/vulnerability/GHSA-29mw-wpgm-hmr9",
    "aliases": [
     "CVE-2020-28500"
    ],
    "fixedIn": [
     "4.17.21"
    ],
    "summary": "Regular Expression Denial of Service (ReDoS) in lodash",
    "severity": "MODERATE"
   },
   {
    "id": "GHSA-35jh-r3h4-6jhm",
    "link": "https://osv.dev/vulnerability/GHSA-35jh-r3h4-6jhm",
    "aliases": [
     "CVE-2021-23337",
     "CVE-2026-4800"
    ],
    "fixedIn": [
     "4.17.21"
    ],
    "summary": "Command Injection in lodash",
    "severity": "HIGH"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-package-vulnerability-scanner-06c14988/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)