TAR Engine MCP

An open-source MCP server that audits AI skill safety before deployment. It performs static, semantic, adversarial, and supply-chain scans on SKILL.md, Codex skill.yaml, and OpenCode configs to detect hidden instructions, credential exfiltration, and malicious runtime behavior.

Visit TAR Engine

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by TAR Engine

Vendor documentation

What you can do with it

Audit SKILL.md files for hidden malicious instructions
Scan for credential exfiltration and secret leaks
Detect supply-chain risks in declared dependencies
Run safety checks in CI pipelines before publishing skills

Source and maintenance

Community listingRegistry 0.3.3

mcp-registry: io.github.qingxuantang/tar-engine@0.3.3 Source repository Project website

Maintenance checked: Nov 1, 2026, 6:05 AM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

tar-engine 0.3.3

pypiuvx

tar-engine package definition

{
  "version": "0.3.3",
  "transport": "stdio",
  "identifier": "tar-engine",
  "runtimeHint": "uvx",
  "registryType": "pypi",
  "packageArguments": [
    {
      "name": "--from",
      "type": "positional",
      "value": "tar-engine",
      "description": "Install the tar-engine wheel that provides the tar-engine-mcp executable."
    },
    {
      "name": "tar-engine-mcp",
      "type": "positional",
      "value": "tar-engine-mcp",
      "description": "Run the MCP server entry point exposed by the tar-engine wheel."
    }
  ],
  "environmentVariables": [
    {
      "name": "TAR_ENGINE_URL",
      "description": "Override the audit backend. Default is the hosted playground at https://tarai.dev. Set to http://localhost:8765 (or your own tar-engine deployment) to self-host and keep SKILL.md content on your machine."
    },
    {
      "name": "TAR_ENGINE_BYOK_OPENAI_KEY",
      "description": "OpenAI API key that unlocks the semantic LLM and adversarial prompt-fuzz layers. Static and supply-chain layers run without it."
    },
    {
      "name": "TAR_ENGINE_BYOK_ANTHROPIC_KEY",
      "description": "Anthropic API key alternative to the OpenAI key for the semantic and adversarial layers."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "tar-engine-mcp": {
      "command": "uvx",
      "args": [
        "tar-engine==0.3.3",
        "--from=tar-engine",
        "tar-engine-mcp=tar-engine-mcp"
      ],
      "env": {
        "TAR_ENGINE_URL": "<YOUR_TAR_ENGINE_URL>",
        "TAR_ENGINE_BYOK_OPENAI_KEY": "<YOUR_TAR_ENGINE_BYOK_OPENAI_KEY>",
        "TAR_ENGINE_BYOK_ANTHROPIC_KEY": "<YOUR_TAR_ENGINE_BYOK_ANTHROPIC_KEY>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "tar-engine-mcp": {
      "command": "uvx",
      "args": [
        "tar-engine==0.3.3",
        "--from=tar-engine",
        "tar-engine-mcp=tar-engine-mcp"
      ],
      "env": {
        "TAR_ENGINE_URL": "<YOUR_TAR_ENGINE_URL>",
        "TAR_ENGINE_BYOK_OPENAI_KEY": "<YOUR_TAR_ENGINE_BYOK_OPENAI_KEY>",
        "TAR_ENGINE_BYOK_ANTHROPIC_KEY": "<YOUR_TAR_ENGINE_BYOK_ANTHROPIC_KEY>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "tar-engine-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "tar-engine==0.3.3",
        "--from=tar-engine",
        "tar-engine-mcp=tar-engine-mcp"
      ],
      "env": {
        "TAR_ENGINE_URL": "<YOUR_TAR_ENGINE_URL>",
        "TAR_ENGINE_BYOK_OPENAI_KEY": "<YOUR_TAR_ENGINE_BYOK_OPENAI_KEY>",
        "TAR_ENGINE_BYOK_ANTHROPIC_KEY": "<YOUR_TAR_ENGINE_BYOK_ANTHROPIC_KEY>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "tar-engine-mcp": {
      "command": "uvx",
      "args": [
        "tar-engine==0.3.3",
        "--from=tar-engine",
        "tar-engine-mcp=tar-engine-mcp"
      ],
      "env": {
        "TAR_ENGINE_URL": "<YOUR_TAR_ENGINE_URL>",
        "TAR_ENGINE_BYOK_OPENAI_KEY": "<YOUR_TAR_ENGINE_BYOK_OPENAI_KEY>",
        "TAR_ENGINE_BYOK_ANTHROPIC_KEY": "<YOUR_TAR_ENGINE_BYOK_ANTHROPIC_KEY>"
      }
    }
  }
}

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