Agent Service · x402 · early usage

Prioritize up to 50 CVEs in one request using FIRST EPSS, CISA KEV, and known ransomwar…

by zeroworker-security-api.zeroworker-lab.workers.dev · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls7

30d payers4

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Prioritize up to 50 CVEs in one request using FIRST EPSS, CISA KEV, and known ransomware signals. Returns deterministic risk scores, urgency tiers, exploitation signals, vendor/product context, and remediation metadata as machine-readable JSON. Built for security automation and AI agents. No account or API key required. $0.01 per successful request via x402. Invalid input, no-signal results, and temporary resource failures do not settle.

Tags: security · cve · epss · kev · vulnerability-management · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "cves": [
    "CVE-2021-44228",
    "CVE-2023-44487"
  ]
}

Output example

{
  "count": 1,
  "dataAvailableCount": 1,
  "dataUnavailableCount": 0,
  "results": [
    {
      "cve": "CVE-2021-44228",
      "dataAvailable": true,
      "epss": 0.99999,
      "epssPercentile": 1,
      "inKev": true,
      "kevDateAdded": "2021-12-10",
      "kevDueDate": "2021-12-24",
      "product": "Log4j2",
      "ransomwareKnown": true,
      "reasons": [
        "Listed in CISA KEV (known exploitation observed)",
        "CISA marks known ransomware campaign use",
        "EPSS 100.00%",
        "EPSS percentile 100.00%"
      ],
      "score": 100,
      "tier": "urgent",
      "vendor": "Apache"
    }
  ]
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/33209.json for the price and payment options.
Pay. Call GET https://zeroworker-security-api.zeroworker-lab.workers.dev/v1/prioritize. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 7 calls · 4 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0xad277cf8B5D9fa5008D06cBdBE349F5DF3c0Cc8f	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xad277cf8B5D9fa5008D06cBdBE349F5DF3c0Cc8f",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "count": {
          "maximum": 50,
          "minimum": 1,
          "type": "integer"
        },
        "dataAvailableCount": {
          "maximum": 50,
          "minimum": 0,
          "type": "integer"
        },
        "dataUnavailableCount": {
          "maximum": 50,
          "minimum": 0,
          "type": "integer"
        },
        "results": {
          "items": {
            "properties": {
              "cve": {
                "description": "CVE identifier.",
                "type": "string"
              },
              "dataAvailable": {
                "description": "Whether FIRST EPSS or CISA KEV supplied usable prioritization signal data.",
                "type": "boolean"
              },
              "epss": {
                "anyOf": [
                  {
                    "maximum": 1,
                    "minimum": 0,
                    "type": "number"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "FIRST EPSS probability when available."
              },
              "epssPercentile": {
                "anyOf": [
                  {
                    "maximum": 1,
                    "minimum": 0,
                    "type": "number"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "FIRST EPSS percentile when available."
              },
              "inKev": {
                "description": "Whether the CVE is listed in CISA KEV.",
                "type": "boolean"
              },
              "kevDateAdded": {
                "anyOf": [
                  {
                    "type": "string"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "Date the CVE was added to CISA KEV when available."
              },
              "kevDueDate": {
                "anyOf": [
                  {
                    "type": "string"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "CISA KEV due date when available."
              },
              "product": {
                "anyOf": [
                  {
                    "type": "string"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "Product from CISA KEV when available."
              },
              "ransomwareKnown": {
                "description": "Whether CISA KEV marks known ransomware campaign use.",
                "type": "boolean"
              },
              "reasons": {
                "description": "Human-readable reasons supporting the score and tier.",
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "requiredAction": {
                "anyOf": [
                  {
                    "type": "string"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "CISA KEV required action when available."
              },
              "score": {
                "anyOf": [
                  {
                    "maximum": 100,
                    "minimum": 0,
                    "type": "number"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "Deterministic priority score from 0 to 100; null when no usable signal is available for this CVE."
              },
              "tier": {
                "description": "Priority tier derived from the deterministic score and KEV status.",
                "enum": [
                  "urgent",
                  "high",
                  "medium",
                  "low",
                  "unknown"
                ],
                "type": "string"
              },
              "vendor": {
                "anyOf": [
                  {
                    "type": "string"
                  },
                  {
                    "type": "null"
                  }
                ],
                "description": "Vendor from CISA KEV when available."
              }
            },
            "required": [
              "cve",
              "dataAvailable",
              "score",
              "tier",
              "inKev",
              "ransomwareKnown",
              "reasons"
            ],
            "type": "object"
          },
          "maxItems": 50,
          "minItems": 1,
          "type": "array"
        }
      },
      "required": [
        "count",
        "dataAvailableCount",
        "dataUnavailableCount",
        "results"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "count": 0,
    "dataAvailableCount": 0,
    "dataUnavailableCount": 0,
    "results": [
      {
        "cve": "string",
        "dataAvailable": true,
        "epss": null,
        "epssPercentile": null,
        "inKev": true,
        "kevDateAdded": null,
        "kevDueDate": null,
        "product": null,
        "ransomwareKnown": true,
        "reasons": [
          "string"
        ],
        "requiredAction": null,
        "score": null,
        "tier": "urgent",
        "vendor": null
      }
    ]
  },
  "type": "string"
}

Examples

curl

curl "https://zeroworker-security-api.zeroworker-lab.workers.dev/v1/prioritize"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://zeroworker-security-api.zeroworker-lab.workers.dev/v1/prioritize");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://zeroworker-security-api.zeroworker-lab.workers.dev/v1/prioritize")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: zeroworker-security-api.zeroworker-lab.workers.dev
Endpoint: https://zeroworker-security-api.zeroworker-lab.workers.dev/v1/prioritize
Machine-readable: /resources/33209.json