How do I install Bastion?

Bastion is a local plugin. Install it using npm package: mcp-bastion and add the generated configuration snippet to your AI app's MCP config file. Then restart your AI app.

Is Bastion safe to use?

Bastion scored 5.2/10 (moderate risk) in MCP Marketplace's automated security scan. It has 5 high or critical findings to review. It's listed, but review the security report on this page before installing.

What AI apps work with Bastion?

Bastion uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Bastion MCP Server

by Gowthaman90

Developer ToolsModerate5.2MCP RegistryLocal

Free

Server data from the Official MCP Registry

Reliability + security proxy for MCP: runtime tool-security and a compliance-mapped audit trail.

About

Reliability + security proxy for MCP: runtime tool-security and a compliance-mapped audit trail.

Security Report

5.2

Moderate5.2Moderate Risk

mcp-bastion is a well-engineered security proxy for MCP servers with comprehensive defense-in-depth controls. The codebase demonstrates strong security practices: proper input validation, safe credential handling (environment variables, no hardcoded secrets), no malicious patterns, and thoughtful permission scoping. The security engine implements multiple layers of protection (rug-pull detection, poisoning inspection, data-flow tracking, DLP redaction) with appropriate defaults. Minor code quality observations around error handling breadth and logging of sanitized findings prevent a higher score, but these are low-severity. Supply chain analysis found 6 known vulnerabilities in dependencies (2 critical, 3 high severity). Package verification found 1 issue.

4 files analyzed · 11 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

process_spawn

Check that this permission is expected for this type of plugin.

HTTP Network Access

Connects to external APIs or services over the internet.

env_vars

Check that this permission is expected for this type of plugin.

File System Write

Writes or modifies files on your machine. Check that this is expected for the tool.

File System Read

Reads files on your machine. Normal for tools that analyze or process local data.

system_info

Check that this permission is expected for this type of plugin.

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-gowthaman90-mcp-bastion": {
      "args": [
        "-y",
        "mcp-bastion"
      ],
      "command": "npx"
    }
  }
}

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Bastion MCP Server

About

Security Report

Findings (11)Action required

Permissions Required

How to Install

Reviews

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