MCP server CodexPluginDoctor

Codex Plugin Doctor

A CLI that checks Codex plugins, skills, and MCP servers before you ship them: the package, its security, and, if you allow it, the running MCP server.

npx codex-plugin-doctor check path/to/plugin

Point it at a folder with .codex-plugin/plugin.json. A plugin with an API key in its .mcp.json exits with status 1 and this report (recommended commands trimmed):

Codex Plugin Doctor
===================
Status: FAIL
Target: /path/to/plugin
Summary: 1 fail, 0 warn, 1 total

Failures
--------
✖ plugin.security.hard_coded_secret
  Message: The MCP server `dangerServer` contains a hard-coded secret-like env value for `OPENAI_API_KEY`.
  Impact: Hard-coded credentials inside plugin bundles increase leakage risk and make secure rotation difficult.
  Suggested fix: Replace the literal value for `OPENAI_API_KEY` with an environment reference or injected secret outside the package.
  Fingerprint: 21da7c75027f0811929d49253412a0f20694d974f141d0421410c89ee29c8b72
  Evidence: serverName=dangerServer, configPath=.mcp.json, envKey=OPENAI_API_KEY, envValue=[REDACTED]

Add --runtime to also start the plugin's MCP servers and call them. That runs the package's own code, so it is opt-in, and --sandbox docker isolates local Node.js stdio servers. No plugin at hand? npx codex-plugin-doctor check --installed checks the ones in your Codex plugin cache.

What It Checks

• Package: .codex-plugin/plugin.json, skill wiring and SKILL.md metadata, .mcp.json structure, description quality, hard-coded secrets, and paths that escape the package.
• Security (security .): a scorecard for shell wrappers, encoded commands, remote content piped into a shell, and plain HTTP transports.
• Running servers (--runtime): the MCP handshake, then tools, resources, prompts, and pagination, with a scorecard and a conformance report.
• Breaking changes: MCP snapshots compare tools, prompts, and resource templates with a committed baseline, in a pull request comment and in release notes.
• Other clients (compat . --all --scorecard): whether the MCP config is valid and can be added to Claude Desktop, Cursor, Cline, and Windsurf on this machine.
• Remote servers and publishing: opt-in Remote MCP Readiness, MCP Registry Readiness, and an offline public directory preflight.

See the CLI Reference for more commands and examples, codex-plugin-doctor --help for all of them, and codex-plugin-doctor explain <finding-id> for what a rule means.

Install

npm install -g codex-plugin-doctor
codex-plugin-doctor self-test
codex-plugin-doctor check .
codex-plugin-doctor check . --runtime
codex-plugin-doctor mcp path/to/mcp-package

GitHub Action

name: Validate Codex plugin

on:
  pull_request:

permissions:
  contents: read

jobs:
  doctor:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
        with:
          persist-credentials: false
      - uses: Esquetta/CodexPluginDoctor@v1.92.0
        with:
          version: "1.92.0"
          path: .
          runtime: "true"
          policy: codex-publish

runtime: "true" runs the package's code, so this job keeps a read-only token. codex-plugin-doctor init-ci . writes a workflow for you. See GitHub Action Usage for reports, pull request comments, and inputs.

Documentation

• CLI Reference
• GitHub Action Usage
• MCP Snapshot
• Release Gating
• Rule Catalog
• Official Plugin Components
• Real-World Validation
• Examples
• Changelog
• All documentation

1.0 Stability

The 1.0 line is the stable compatibility baseline for plugin authors and CI consumers.

• Public JSON schema surfaces and existing rule IDs/default severities are treated as stable through 1.0.
• Runtime probing remains opt-in because it executes package-local MCP servers.
• New features stay additive unless a major version says otherwise.

See the documentation index for architecture, usage, security, and contributor guides.

Contributing

Contributions are welcome. Start with Contributing, the Security Policy, the Code of Conduct, and the validation tuning issue template. npm run release-check runs the release preflight; see Versioning and Releases.

Support

If this tool saves you time, GitHub stars and sponsorship help signal that the project is worth continuing.

• Star the repository on GitHub.
• Use GitHub Sponsors through the repository funding link.
• Open validation tuning issues for false positives or false negatives.