How do I install Codex Subagent?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is Codex Subagent official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 55 (Fair). The formula is published on the methodology page.

MCPpedia

Codex Subagent MCP Server | MCPpedia

Codex Subagent MCP Server

Name: Codex Subagent MCP Server
Author: parisbs

Delegate coding tasks to the OpenAI Codex CLI, installed separately, with explicit model and effort.

Tools Versions Alternatives

Registryparisbs

55Fair

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "parisbs-codex-subagent-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "codex-subagent-mcp@0.5.0"
      ],
      "env": {
        "CODEX_SUBAGENT_DEFAULT_MODEL": "",
        "CODEX_SUBAGENT_DEFAULT_EFFORT": "",
        "CODEX_SUBAGENT_ALLOWED_MODELS": "",
        "CODEX_SUBAGENT_DEFAULT_SANDBOX": "",
        "CODEX_SUBAGENT_MAX_SANDBOX": "",
        "CODEX_SUBAGENT_MAX_EFFORT": "",
        "CODEX_SUBAGENT_MCP_SERVERS": "",
        "CODEX_SUBAGENT_PLUGINS": "",
        "CODEX_SUBAGENT_APPS": "",
        "CODEX_BIN": ""
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
CODEX_SUBAGENT_DEFAULT_MODEL	No	Model used when a call names none; without it the server asks which model to use.
CODEX_SUBAGENT_DEFAULT_EFFORT	No	Reasoning effort used when a call specifies none.
CODEX_SUBAGENT_ALLOWED_MODELS	No	Comma-separated allow-list of model slugs; anything else is refused.
CODEX_SUBAGENT_DEFAULT_SANDBOX	No	Sandbox used when a call specifies none. Defaults to read-only and cannot exceed the ceiling.
CODEX_SUBAGENT_MAX_SANDBOX	No	Ceiling on what a delegation may do. Defaults to workspace-write; danger-full-access must be set explicitly.
CODEX_SUBAGENT_MAX_EFFORT	No	Ceiling on reasoning effort.
CODEX_SUBAGENT_MCP_SERVERS	No	MCP servers from Codex's config a delegation keeps: none (default), all, or comma-separated names.
CODEX_SUBAGENT_PLUGINS	No	Installed Codex plugins a delegation keeps: none (default), all, or comma-separated name@marketplace ids.
CODEX_SUBAGENT_APPS	No	Whether a delegation keeps Codex's apps (connectors to external services): off (default) or on.
CODEX_BIN	No	Path to the Codex executable, if it is not codex on PATH. On Windows it must be codex.exe, not a .cmd shim.

Codex Subagent MCP Server

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