Codex adds the server from the terminal and reads the key from your environment.
codex mcp add crado --url https://crado.ai/mcp --bearer-token-env-var CRADO_API_KEY
[mcp_servers.crado] url = "https://crado.ai/mcp" [mcp_servers.crado.http_headers] Authorization = "Bearer YOUR_KEY"
npx skills add crado-ai/claude-plugin -a codex -g