402shield
x402 payment security and pre-execution transaction risk screening for autonomous AI agents.
我该使用它吗
质量与安全性
A
基于对工具定义和协议合规性的自动分析。
上下文开销
~258token 数（工具定义）
~2.7 KB典型响应大小
对注意力的影响极小（占 128k 上下文窗口的 0.20%）
这是每次将服务器的工具加载到模型上下文窗口时所消耗的大致 token 数。数值越高，可用于其他任务的注意力就越少。
安装
一键安装
将以下内容添加到你的 `claude_desktop_config.json` 文件中：
{
"mcpServers": {
"402shield": {
"url": "https://four02shield.onrender.com/mcp"
}
}
}远程端点
https://four02shield.onrender.com/mcpstreamable-http它能做什么
工具清单
工具（1）
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⚪preflight_payment(requested, requestId, expected, policy, transaction, ...)
Prepare a paid 402Shield pre-execution safety check. The returned endpoint costs $0.005 USDC via x402 and returns ALLOW, REVIEW, or BLOCK. This MCP adapter does not bypass payment.
输入模式
{
"type": "object",
"properties": {
"requested": {
"type": "object",
"properties": {
"amountUsd": {
"type": [
"string",
"number"
]
},
"recipient": {
"type": "string"
},
"network": {
"type": "string"
},
"asset": {
"type": "string"
},
"tokenAddress": {
"type": "string"
}
},
"required": [
"amountUsd",
"recipient",
"network",
"asset"
]
},
"requestId": {
"type": "string"
},
"expected": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {}
},
"policy": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {}
},
"transaction": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {}
},
"expectedTransaction": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {}
},
"transactionPolicy": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {}
},
"simulateTransaction": {
"type": "boolean"
}
},
"required": [
"requested"
],
"$schema": "https://json-schema.org/draft/2020-12/schema"
}社区
证据
最近观测
已验证未记录版本1 个工具