Delegate coding tasks to the OpenAI Codex CLI, installed separately, with explicit model and effort.
Codex Subagent is an MCP integration. Delegate coding tasks to the OpenAI Codex CLI, installed separately, with explicit model and effort.
The published npm package is codex-subagent-mcp, version 0.5.0. Its declared MCP transport is stdio.
The package declares CODEX_SUBAGENT_DEFAULT_MODEL: Model used when a call names none; without it the server asks which model to use.; CODEX_SUBAGENT_DEFAULT_EFFORT: Reasoning effort used when a call specifies none.; CODEX_SUBAGENT_ALLOWED_MODELS: Comma-separated allow-list of model slugs; anything else is refused.; CODEX_SUBAGENT_DEFAULT_SANDBOX: Sandbox used when a call specifies none. Defaults to read-only and cannot exceed the ceiling.; CODEX_SUBAGENT_MAX_SANDBOX: Ceiling on what a delegation may do. Defaults to workspace-write; danger-full-access must be set explicitly.; CODEX_SUBAGENT_MAX_EFFORT: Ceiling on reasoning effort.; CODEX_SUBAGENT_MCP_SERVERS: MCP servers from Codex's config a delegation keeps: none (default), all, or comma-separated names.; CODEX_SUBAGENT_PLUGINS: Installed Codex plugins a delegation keeps: none (default), all, or comma-separated name@marketplace ids.; CODEX_SUBAGENT_APPS: Whether a delegation keeps Codex's apps (connectors to external services): off (default) or on.; CODEX_BIN: Path to the Codex executable, if it is not codex on PATH. On Windows it must be codex.exe, not a .cmd shim..
Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.
View the publisher’s registry entry · Project repository · Project website. This profile uses version 0.5.0 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.
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| Variable | Description | Required |
|---|---|---|
| CODEX_SUBAGENT_DEFAULT_MODEL | Model used when a call names none; without it the server asks which model to use. | Optional |
| CODEX_SUBAGENT_DEFAULT_EFFORT | Reasoning effort used when a call specifies none. | Optional |
| CODEX_SUBAGENT_ALLOWED_MODELS | Comma-separated allow-list of model slugs; anything else is refused. | Optional |
| CODEX_SUBAGENT_DEFAULT_SANDBOX | Sandbox used when a call specifies none. Defaults to read-only and cannot exceed the ceiling. | Optional |
| CODEX_SUBAGENT_MAX_SANDBOX | Ceiling on what a delegation may do. Defaults to workspace-write; danger-full-access must be set explicitly. | Optional |
| CODEX_SUBAGENT_MAX_EFFORT | Ceiling on reasoning effort. | Optional |
| CODEX_SUBAGENT_MCP_SERVERS | MCP servers from Codex's config a delegation keeps: none (default), all, or comma-separated names. | Optional |
| CODEX_SUBAGENT_PLUGINS | Installed Codex plugins a delegation keeps: none (default), all, or comma-separated name@marketplace ids. | Optional |
| CODEX_SUBAGENT_APPS | Whether a delegation keeps Codex's apps (connectors to external services): off (default) or on. | Optional |
| CODEX_BIN | Path to the Codex executable, if it is not codex on PATH. On Windows it must be codex.exe, not a .cmd shim. | Optional |
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