Silentfail

Name: Silentfail
Author: decksaga

@decksaga

Silentfail について

Diagnose MCP servers — health checks, tool testing, token cost audits, conflict detection, and security scanning with 50+ prompt injection patterns. Works as CLI or MCP server inside Claude Desktop.

#mcp #diagnostics #security #token-audit #claude #prompt-injection #cli

基本情報

カテゴリ

開発者ツール

トランスポート

stdio

公開者

decksaga

投稿者

Santiago Gutierrez

設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "silentfail": {
      "command": "npx",
      "args": [
        "-y",
        "silentfail@latest",
        "--mcp"
      ]
    }
  }
}

ツール

ツールは検出されませんでした

ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。

概要

What is SilentFail?

SilentFail is a diagnostic and security tool for MCP servers. It discovers all connected MCP servers across supported clients, tests their health, calculates token costs, and scans for security issues like prompt injection and data exfiltration.

How to use SilentFail?

Clone the repository, install dependencies, and build. Add SilentFail as an MCP server to Claude Desktop, or run the CLI directly with commands such as silentfail for a health check, silentfail --test for a full scan, or silentfail --dashboard for the web UI.

Key features of SilentFail

Discovers MCP configs from all major clients.
Spawns servers and measures startup time.
Tests each tool with smart inferred parameters.
Calculates exact token cost per server and tool.
Detects tool name conflicts across servers.
Scans for security threats like prompt injection.

Use cases of SilentFail

Diagnose which MCP servers are failing silently.
Audit token consumption across all connected servers.
Perform security scanning for prompt injection or data exfiltration.
Validate server health in CI/CD pipelines.
Optimize tool selection by comparing token costs.

FAQ from SilentFail

Does SilentFail scan itself?

No, when running as an MCP server, SilentFail automatically excludes itself from the scan to avoid recursion.

Is it safe to run tool tests?

Yes. SilentFail only calls tools with read-only, minimal test inputs (stock tickers, currency codes) and never sends destructive operations.

Can I use it in CI?

Yes, use silentfail --test --json for machine-readable

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