> ## Documentation Index
> Fetch the complete documentation index at: https://docs.0mcp.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Codex

> Connect your published 0mcp server to Codex.

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

<Steps>
  <Step title="Choose a method">Use the generated CLI command for the quickest setup, or copy the TOML block for manual setup.</Step>
  <Step title="Choose a scope">Use `~/.codex/config.toml` for your user account or `.codex/config.toml` for one project.</Step>
  <Step title="Set credentials">Set every environment variable listed by 0mcp before starting Codex.</Step>
  <Step title="Reconnect">Restart Codex or reopen your IDE session, then confirm that the server appears in the MCP list.</Step>
</Steps>

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.

<Warning>
  Do not replace your full Codex configuration with the generated block. Merge it with your existing settings.
</Warning>