# Blockchain Money Map MCP Sampling Exposure Card Audit

> Blockchain Money Map MCP Sampling Exposure Card Audit is a paid API for AI agents from api.blockchainmoneymap.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Audits and documents an AI agent's MCP (Model Context Protocol) sampling capabilities and prompt exposure characteristics, returning a structured exposure card for review.

## Facts

- Endpoint: POST https://api.blockchainmoneymap.com/api/x402/x402-mcp-sampling-exposure-card?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-money-map-mcp-sampling-exposure-card-audit-ada3c806
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JrJ2VyNbWNOdaeV1ub0WS

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 blockchain-money-map-mcp-sampling-exposure-card-audit-ada3c806 -d '<json body>'
```

Example prompt: Run an audit-mode MCP sampling exposure card for my agent — its MCP capabilities include tool calls and resource reads, with a human-in-the-loop approval flow, and I need to know what prompt exposure risk the current sampling setup creates.

## When to prefer this

Choose this endpoint when you need a structured, machine-readable audit of an AI agent's MCP sampling permissions and prompt exposure characteristics — particularly for compliance documentation, pre-deployment safety reviews, or configuration drift detection against a known-good reference. It is purpose-built for MCP capability governance rather than general blockchain data queries offered by sibling endpoints on this platform.

## Known failure modes

- Missing required mcpCapabilities field returns validation error
- mode must be set to 'audit' or request is rejected
- Oversized mcpCapabilities object (>50 properties) causes schema rejection
- Payment not received via x402 results in 402 response
- Malformed policy object may cause processing errors
- Empty or null capabilities object may return incomplete audit card

## How this service works

MCP servers can expose sampling behavior that is hard for buyers to understand before connecting or paying.

## Output

A structured JSON exposure card summarizing the audited MCP capabilities, sampling configuration, prompt exposure assessment, and comparison against any provided reference facts, along with policy-evaluated risk signals.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "audit"
   ]
  },
  "facts": {
   "type": "object",
   "required": [
    "mcpCapabilities"
   ],
   "properties": {
    "approvalFlow": {
     "type": "string",
     "maxLength": 500
    },
    "mcpCapabilities": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "promptExposureNotes": {
     "type": "string",
     "maxLength": 500
    },
    "samplingDescription": {
     "type": "string",
     "maxLength": 500
    }
   },
   "additionalProperties": false
  },
  "policy": {
   "type": "object",
   "additionalProperties": true
  },
  "reference_facts": {
   "type": "object",
   "required": [
    "mcpCapabilities"
   ],
   "properties": {
    "approvalFlow": {
     "type": "string",
     "maxLength": 500
    },
    "mcpCapabilities": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "promptExposureNotes": {
     "type": "string",
     "maxLength": 500
    },
    "samplingDescription": {
     "type": "string",
     "maxLength": 500
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-money-map-mcp-sampling-exposure-card-audit-ada3c806/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchainmoneymap.com](https://www.zero.xyz/host/api.blockchainmoneymap.com/llms.txt)