# EPSS Scanner via AgentDiet MCP Gateway

> EPSS Scanner via AgentDiet MCP Gateway is a paid API for AI agents from mcp-gateway.agentdiet.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Fetches EPSS (Exploit Prediction Scoring System) vulnerability probability scores for a given software package, returning risk data with high compression efficiency.

## Facts

- Endpoint: GET https://mcp-gateway.agentdiet.dev/v1/epss-scanner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/epss-scanner-via-agentdiet-mcp-gateway-7ad6a81b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3ND9VhRTQ02qfU8QyO5fy

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 epss-scanner-via-agentdiet-mcp-gateway-7ad6a81b
```

Example prompt: Can you check the EPSS exploit probability score for the 'requests' package so I can assess whether it's safe to include as a dependency?

## When to prefer this

Choose this endpoint when you need EPSS exploit prediction scores for a specific software package and want to pay per-call via USDC on Base without managing an API key. It is ideal for agents doing automated dependency security checks or supply chain risk assessments within an x402/MCP payment-enabled workflow. Prefer it over direct FIRST.org API calls when operating inside a broader MCP/A2A agent ecosystem that already settles via this gateway.

## Known failure modes

- Missing required 'package' query parameter returns an error or empty data
- Unknown or misspelled package name may return empty or null score data
- Payment failure (insufficient USDC on Base) results in 402 response blocking access
- Network or gateway timeout if upstream EPSS/FIRST.org service is unavailable
- Invalid HTTP method (not GET or POST) returns schema validation error

## How this service works

Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.

## Output

Returns a JSON object with a 'status' field ('ok'), a 'data' object containing EPSS score and exploit probability information for the queried package, and a 'roi_proof' object indicating the compression ratio (e.g. 91.4%) achieved in the response.

## 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",
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "package": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "status": "ok",
  "roi_proof": {
   "compression_ratio_pct": 91.4
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/epss-scanner-via-agentdiet-mcp-gateway-7ad6a81b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-gateway.agentdiet.dev](https://www.zero.xyz/host/mcp-gateway.agentdiet.dev/llms.txt)