Cmd. /mcp
List configured MCP tools and inspect server diagnostics.
Key takeaways
/mcplists configured Model Context Protocol tools available to Codex;/mcp verboseadds server-level diagnostics.- Run it before asking Codex to use an external tool, and use verbose mode when a server is present but a tool is missing or failing.
- Tool availability can differ by profile, workspace, and trust state.
- Pair MCP write or destructive tools with
/permissionsand team policy.
Original Command Declaration
/mcpOfficial Summary
/mcp lists configured Model Context Protocol tools available to Codex. Use /mcp verbose for
server-level diagnostics.
Usage
/mcpGood Examples
- Run
/mcpbefore asking Codex to use an external tool. - Run
/mcp verbosewhen a server is present but a tool is missing or failing.
Similar Commands
| Command | Difference | Choose It When |
|---|---|---|
/mcp | Lists MCP tools and diagnostics | You need the actual tool surface |
/apps | Inserts app mentions | You need a connector in the prompt |
/plugins | Manages packaged capabilities | You need to inspect installed bundles |
Use Cases
- Auditing available MCP tools.
- Debugging missing server tools.
- Verifying team tool configuration before automation.
Recent Changes
/mcp verboseprovides deeper server diagnostics.- Built-in MCPs and plugin-provided capabilities are increasingly first-class in runtime flows.
Cautions
- Tool availability can differ by profile, workspace, and trust state.
- Pair MCP write or destructive tools with
/permissionsand team policy.
Release Basis
- Judgment: confirmed addition
- First evidence version:
rust-v0.23.0 - Date (UTC): 2025-08-20
- Release link: https://github.com/openai/codex/releases/tag/rust-v0.23.0
Sources
- Codex slash commands: https://developers.openai.com/codex/cli/slash-commands
- Codex CLI features: https://developers.openai.com/codex/cli/features