# X402-BROKER MCP Gateway Audit Endpoint

> X402-BROKER MCP Gateway Audit Endpoint 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).

Audits and retrieves metadata about the MCP/x402/A2A broker gateway, returning operational status and compression/ROI proof data.

## Facts

- Endpoint: GET https://mcp-gateway.agentdiet.dev/api/mcp/audit?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/x402-broker-mcp-gateway-audit-endpoint-bfd100c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Lt1ylA7HswE0mcDP0JWue

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 x402-broker-mcp-gateway-audit-endpoint-bfd100c6
```

Example prompt: Run an audit on the MCP gateway broker and give me the current status and ROI proof, including the compression ratio.

## When to prefer this

Use this endpoint when you need to verify the operational status and efficiency metrics of the AgentDiet MCP gateway broker before routing agent traffic through it, or when you need ROI/compression proof data for the x402/MCP broker infrastructure specifically.

## Known failure modes

- Payment not settled — 402 response if USDC payment on Base is not included
- Invalid input type — must be 'http'
- Invalid method — must be GET or POST
- Gateway unavailable — service downtime or network error
- Malformed query parameters — unexpected fields rejected by schema

## 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 audit details, and an roi_proof object that includes a compression_ratio_pct value (e.g. 91.4%), indicating gateway efficiency and operational proof.

## 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": {
      "query": {
       "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/x402-broker-mcp-gateway-audit-endpoint-bfd100c6/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)