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[MCP] Improve docs (#4811)

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Updated, expanded on, clarified, and deduplicated some MCP docs
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Gabriel Peal
2025-10-06 08:43:50 -07:00
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parent 36f1cca1b1
commit 721003c552
5 changed files with 48 additions and 22 deletions
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docs/advanced.md
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@@ -16,15 +16,7 @@ See the Rust documentation on [`RUST_LOG`](https://docs.rs/env_logger/latest/env
## Model Context Protocol (MCP)
The Codex CLI can be configured to leverage MCP servers by defining an [`mcp_servers`](./config.md#mcp_servers) section in `~/.codex/config.toml`. It is intended to mirror how tools such as Claude and Cursor define `mcpServers` in their respective JSON config files, though the Codex format is slightly different since it uses TOML rather than JSON, e.g.:
```toml
# IMPORTANT: the top-level key is `mcp_servers` rather than `mcpServers`.
[mcp_servers.server-name]
command = "npx"
args = ["-y", "mcp-server"]
env = { "API_KEY" = "value" }
```
The Codex CLI and IDE extension is a MCP client which means that it can be configured to connect to MCP servers. For more information, refer to the [`config docs`](./config.md#connecting-to-mcp-servers).
## Using Codex as an MCP Server