config-reference.md Codex Docs, 2026-03-27 00:39 UTC → 2026-04-12 06:38 UTC

91| `mcp_servers.<id>.startup_timeout_sec` | `number` | Override the default 10s startup timeout for an MCP server. |91| `mcp_servers.<id>.startup_timeout_sec` | `number` | Override the default 10s startup timeout for an MCP server. |

92| `mcp_servers.<id>.tool_timeout_sec` | `number` | Override the default 60s per-tool timeout for an MCP server. |92| `mcp_servers.<id>.tool_timeout_sec` | `number` | Override the default 60s per-tool timeout for an MCP server. |

93| `mcp_servers.<id>.url` | `string` | Endpoint for an MCP streamable HTTP server. |93| `mcp_servers.<id>.url` | `string` | Endpoint for an MCP streamable HTTP server. |

94| `model` | `string` | Model to use (e.g., `gpt-5-codex`). |94| `model` | `string` | Model to use (e.g., `gpt-5.4`). |

95| `model_auto_compact_token_limit` | `number` | Token threshold that triggers automatic history compaction (unset uses model defaults). |95| `model_auto_compact_token_limit` | `number` | Token threshold that triggers automatic history compaction (unset uses model defaults). |

96| `model_catalog_json` | `string (path)` | Optional path to a JSON model catalog loaded on startup. Profile-level `profiles.<name>.model_catalog_json` can override this per profile. |96| `model_catalog_json` | `string (path)` | Optional path to a JSON model catalog loaded on startup. Profile-level `profiles.<name>.model_catalog_json` can override this per profile. |

97| `model_context_window` | `number` | Context window tokens available to the active model. |97| `model_context_window` | `number` | Context window tokens available to the active model. |

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1195Details1195Details

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1197Model to use (e.g., `gpt-5-codex`).1197Model to use (e.g., `gpt-5.4`).

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1199Key1199Key

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