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Codex MCP install docs You can find your Ref API key at ref.tools/keys

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Install

Codex is configured in a config.toml file. This typically lives at ~/.codex/config.toml To enable Ref Plans, update your config.toml to include:
For plan-specific mode:

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Verify

Run the command:
You should see ref-plan listed with the Ref Plans MCP URL.

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Get help

If you have any issues, please reach out to help@ref.tools. We’re happy to help you get started!