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Falcon Shield

Pre-sign Solana tx guard for agents: ALLOW/WARN/BLOCK verdict, x402 USDC pay-per-call.

我該用這個嗎

品質與安全性

A
說明品質
100%
結構描述完整度
100%
命名品質
80%
汙染風險
100%
權限相符程度
100%
協定合規性
100%

根據工具定義與協定合規性的自動化分析。

上下文成本

~515Token（工具定義）
~5.1 KB典型回應大小
極小的注意力影響（128k 上下文的 0.40%）

這是每次將伺服器的工具載入模型上下文時所消耗的約略 token 數量。數量越高，可用於其他工作的注意力就越少。

安裝

一鍵安裝

將以下內容加入你的 `claude_desktop_config.json` 檔案：

{
  "mcpServers": {
    "falcon-shield": {
      "url": "https://falcon-shield.falcon-sol.workers.dev/mcp"
    }
  }
}

遠端端點

https://falcon-shield.falcon-sol.workers.dev/mcpstreamable-http

它能做什麼

工具清單

工具（1）

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🟢shield_guard_check(tx, wallet, known_addresses, quote, cap_base_units, ...)

Use this before an agent or wallet signs a Solana transaction. Decodes the unsigned or signed transaction and returns NO_MATCH (no known-bad pattern matched; not a safety guarantee), WARN, or BLOCK, with plain-language reasons and a signed receipt. Pass an x402 quote to also check a payment transaction against it (overpay, approve-instead-of-transfer, unchecked Transfer, wrong payee). Errors return ERROR and are never charged. Price $0.009 USDC (x402, Solana).

輸入結構描述

{
  "type": "object",
  "properties": {
    "tx": {
      "type": "string",
      "description": "Base64 wire transaction (also accepts an RPC getTransaction result)."
    },
    "wallet": {
      "type": "string",
      "description": "Your own pubkey; only this key is treated as 'you'."
    },
    "known_addresses": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 200,
      "description": "Optional: pubkeys you have recently paid or received from. A recipient that only looks like one of these (same first/last characters) is flagged as address poisoning."
    },
    "quote": {
      "type": "object",
      "description": "x402 quote the tx pays: {asset, amount, pay_to | pay_to_token_account, decimals?, token_program?}."
    },
    "cap_base_units": {
      "type": "integer",
      "description": "Hard per-payment cap enforced even if the quote asks for more."
    },
    "caps": {
      "type": "object",
      "description": "Optional spend caps you declare; any violation returns BLOCK. Keys: max_amount (int base units per outflow), max_amounts ({mint|'SOL': int}), max_total (int per asset), allowed_payees ([pubkey]; owners' ATAs match), allowed_assets ([mint|'SOL']), allow_approvals (bool, default false)."
    },
    "simulate": {
      "type": "boolean",
      "description": "Simulate against Solana mainnet (Helius RPC, sigVerify off, recent blockhash replaced, never submitted). Default true; false = static checks only. If simulation fails the verdict is at least WARN, except plain System/Token/ATA/ComputeBudget/Memo transactions with no unresolved lookup tables, which are fully decoded statically. Third-party unlimited approvals BLOCK by default. Response includes risk_score (0-100), basis (simulated|static) and top_reason."
    },
    "strict": {
      "type": "boolean",
      "description": "Escalate HIGH-risk token approvals (unlimited or third-party delegate) from WARN to BLOCK. Default false."
    }
  },
  "required": [
    "tx"
  ]
}

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