Install Om MCP in Codex

Add the hosted Om MCP in Codex App as a Developer mode plugin, or attach it from the Codex CLI with email-only OAuth.

Codex App

Codex App uses ChatGPT Developer mode and a custom unpublished plugin. Do not start from ~/.codex/config.toml. Developer mode is required for this unpublished plugin path. The Codex CLI path below does not need Developer mode.

  1. Sign in to ChatGPT. Open Settings → Security and login and turn on Developer mode.
  2. Open Settings → Plugins, or go to chatgpt.com/plugins.
  3. Choose +, name the plugin Om, and paste https://agents.omtx.ai/mcp.
  4. Create the connection. When the Om authorization page opens, sign in with your Om account.
  5. Review the requested permission. It must be email only. There is no OpenID checkbox or path to select. Do not approve openid, profile, or phone.
  6. Approve the email permission, return to ChatGPT, and confirm Om reports connected.
  7. Start a new conversation. Choose Developer mode from the + menu, enable Om, then ask for om_status.
Plugin fieldstext
Name: Om
MCP server URL: https://agents.omtx.ai/mcp

Codex CLI

For the terminal CLI, add the hosted Om MCP endpoint and complete OAuth with the email scope. Do not use --scopes openid,email.

codex mcp addBash
codex mcp add omtx --url https://agents.omtx.ai/mcp
codex mcp login --scopes email omtx

Email only. No OpenID path.

Hosted Om MCP advertises email only. The ChatGPT plugin consent screen is not a list where you should enable OpenID. Codex CLI currently requests extra OIDC scopes by default, so the documented login is codex mcp login --scopes email omtx. If openid, profile, or phone appears, cancel instead of approving.

What to do after connect

  1. In Codex App, start a new conversation with Developer mode and Om enabled.
  2. In the CLI, restart Codex so the new MCP server is loaded.
  3. Ask for om_status or pricing_get to confirm the server is attached.
  4. Move into a real workflow such as scoring a protein, Discovery, or Hub launch.

Good first prompts

  • Use Om MCP to search KRAS and summarize the therapeutic strategy.
  • List Generated Data entries available to my account.
  • Run deep diligence on KEAP1 resistance and show the strongest citations.
  • Launch a Hub workflow and tell me how to track the job.