MCP MeasureMCP Measure

index observed

402shield

x402 payment security and pre-execution transaction risk screening for autonomous AI agents.

Should I use this

Quality & Safety

A
Description quality
100%
Schema completeness
80%
Naming quality
80%
Poisoning risk
100%
Permission match
100%
Protocol compliance
100%

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~258Tokens (tool definitions)
~2.7 KBTypical response size
Minimal attention impact (0.20% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "402shield": {
      "url": "https://four02shield.onrender.com/mcp"
    }
  }
}

Remote endpoints

https://four02shield.onrender.com/mcpstreamable-http

What it can do

Tool inventory

Tools (1)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
⚪preflight_payment(requested, requestId, expected, policy, transaction, ...)

Prepare a paid 402Shield pre-execution safety check. The returned endpoint costs $0.005 USDC via x402 and returns ALLOW, REVIEW, or BLOCK. This MCP adapter does not bypass payment.

Input Schema

{
  "type": "object",
  "properties": {
    "requested": {
      "type": "object",
      "properties": {
        "amountUsd": {
          "type": [
            "string",
            "number"
          ]
        },
        "recipient": {
          "type": "string"
        },
        "network": {
          "type": "string"
        },
        "asset": {
          "type": "string"
        },
        "tokenAddress": {
          "type": "string"
        }
      },
      "required": [
        "amountUsd",
        "recipient",
        "network",
        "asset"
      ]
    },
    "requestId": {
      "type": "string"
    },
    "expected": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "policy": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "transaction": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "expectedTransaction": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "transactionPolicy": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "simulateTransaction": {
      "type": "boolean"
    }
  },
  "required": [
    "requested"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Community

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Evidence

Recent observations

verifiedversion not recorded1 tools