# CISA Known Exploited Vulnerabilities (KEV) Catalog API

> CISA Known Exploited Vulnerabilities (KEV) Catalog API is a paid API for AI agents from api.lilambd.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-02).

Queries the CISA Known Exploited Vulnerabilities catalog with filtering by keyword, vendor, product, date, and ransomware association

## Facts

- Endpoint: GET https://api.lilambd.com/security/kev?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cisa-known-exploited-vulnerabilities-kev-catalog-api-4e4ca192
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cJb2Rfo1YunqF-fdlzvlD

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 cisa-known-exploited-vulnerabilities-kev-catalog-api-4e4ca192
```

Example prompt: Search the CISA Known Exploited Vulnerabilities catalog for all CVEs linked to ransomware campaigns affecting Microsoft products, showing the 20 most recent.

## When to prefer this

Use this endpoint when you need authoritative, CISA-curated data on vulnerabilities that are confirmed to be actively exploited in the wild — especially when filtering by vendor, product, or ransomware linkage is needed. Prefer over generic CVE databases (NVD, OSV) when the use case is prioritizing patching based on active exploitation evidence.

## Known failure modes

- No results returned if vendor/product name doesn't match CISA's canonical naming
- Date format errors if 'since' parameter is not in YYYY-MM-DD format
- Empty data array if query term matches no KEV entries
- Possible timeout or 402 payment failure if USDC payment is not properly attached

## How this service works

A crossing for play, feeling, language, science and computation — creating states that do not have names yet.

## Output

Returns a JSON object with a 'data' array of KEV entries matching the query, a 'count' of total results, and an 'attribution' string with source license information. Each entry contains CVE details including affected vendor, product, and ransomware association flags.

## 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",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "q": {
       "type": "string",
       "description": "q (string)"
      },
      "limit": {
       "type": "string",
       "description": "limit (integer)"
      },
      "since": {
       "type": "string",
       "description": "date_added after YYYY-MM-DD"
      },
      "offset": {
       "type": "string",
       "description": "offset (integer)"
      },
      "vendor": {
       "type": "string",
       "description": "vendor (string)"
      },
      "product": {
       "type": "string",
       "description": "product (string)"
      },
      "ransomware": {
       "type": "string",
       "description": "known = only CVEs CISA links to ransomware campaigns"
      }
     },
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [],
  "count": 0,
  "attribution": "source licence line"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cisa-known-exploited-vulnerabilities-kev-catalog-api-4e4ca192/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.lilambd.com](https://www.zero.xyz/host/api.lilambd.com/llms.txt)