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Publish a version, open Setup, and select Codex. 0mcp provides both a CLI command and TOML configuration.
1

Choose a method

Use the generated CLI command for the quickest setup, or copy the TOML block for manual setup.
2

Choose a scope

Use ~/.codex/config.toml for your user account or .codex/config.toml for one project.
3

Set credentials

Set every environment variable listed by 0mcp before starting Codex.
4

Reconnect

Restart Codex or reopen your IDE session, then confirm that the server appears in the MCP list.
Keep any existing TOML entries when adding the new server block. If the file already has a block with the same name, update it instead of creating a duplicate.
Do not replace your full Codex configuration with the generated block. Merge it with your existing settings.