Title: Connect Codex Description: Add OpenPost to Codex with remote MCP and browser sign-in. Canonical: https://openpo.st/docs/mcp/codex Source: [https://openpo.st/docs/mcp/codex](https://openpo.st/docs/mcp/codex) # Connect Codex Connect OpenPost once to review a schedule or prepare a draft from Codex. Codex CLI, its IDE extension, and the ChatGPT desktop app share the MCP configuration for the same host. ## Add OpenPost Open **Settings → MCP servers → Add server** in the desktop app, choose **Streamable HTTP**, enter `https://app.openpo.st/mcp`, and save. Or add this entry to `~/.codex/config.toml` for Codex CLI: ```toml [mcp_servers.openpost] url = "https://app.openpo.st/mcp" ``` In the desktop app, restart and choose **Authenticate** beside OpenPost. From Codex CLI, run: ```sh codex mcp login openpost ``` Complete OpenPost's browser sign-in. Choose `mcp:read` to inspect your workspace, or `mcp:full` to let Codex change publications. Start a new session after adding the server. ## Check the connection In Codex CLI, run `codex mcp list`; in the desktop app, check the MCP server list. Then ask Codex, "List my OpenPost workspaces." Name one and ask for its schedule without making changes. ## If it does not connect Authenticate again if the login expired. Check that the configured URL ends in `/mcp`. For a private self-hosted server, use the [local bridge](https://openpo.st/docs/mcp/mcp-guide/self-hosted-and-local) with `command = "openpost-mcp"` and `args = ["--profile", "local"]` in the configuration. That bridge runs on the same machine as Codex. See [Codex MCP configuration](https://developers.openai.com/codex/mcp) for client settings.