ChatGPT + Codex
Create a custom app
- Open Settings or Workspace Settings → Apps. Enable developer mode or custom apps if your workspace shows that control.
- Choose Create, name the app Marli, paste the production endpoint, and choose OAuth authentication.
- Select Scan tools, finish Lytica sign-in and organization selection, confirm
ask_marliappears, then create or publish the app as your workspace requires. - Start a normal chat, add Marli from Apps or Tools, and ask your question.
Custom-app availability and admin controls vary by plan and workspace. ChatGPT Agent mode does not use custom apps, and ChatGPT web does not read your local Codex configuration. If Marli’s tools change, a workspace admin must refresh or rescan them and publish again.
Add Marli from the CLI
Codex desktop, CLI, and IDE integrations share the same MCP configuration.
codex mcp add marli --url https://mcp.lyticalabs.ai/mcp
codex mcp login marli
codex mcp listPrefer the app? Open Settings → MCP servers → Add server, choose Streamable HTTP, paste the endpoint, save, and authenticate.
OpenAI’s Codex MCP guide