Codex

Install globally

Create or edit ~/.codex/config.toml with the following entry. Use your API key in place of uig_live_YOUR_KEY_HERE:

[mcp_servers.ui-guideline]url = "https://mcp.uiguideline.com/api/mcp"http_headers = { "UIG_API_KEY" = "uig_live_YOUR_KEY_HERE" }

Restart the Codex CLI to pick up the change.

Install per project

Create a .codex/config.toml at your project root with the same entry and commit it. Each teammate fills in their own key.