Codex Desktop
Connect Slate MCP to Codex Desktop to create and manage Slate courses from inside the OpenAI Codex app.
Codex Desktop and Codex CLI share the same configuration file, so this setup also enables Slate in the CLI if you have it installed. The reverse is also true: if you’ve already followed the Codex CLI setup, Slate will work in Codex Desktop without any further changes.
Prerequisites
Section titled “Prerequisites”- The OpenAI Codex desktop app installed
- A Slate account on a Standard or Pro plan
Step 1: Open settings
Section titled “Step 1: Open settings”In the Codex desktop app, open Settings.
Step 2: Go to MCP Servers
Section titled “Step 2: Go to MCP Servers”Select MCP Servers, then click Add Server.
Step 3: Add Slate
Section titled “Step 3: Add Slate”Enter Slate as the name, choose Streamable HTTP as the transport, and paste this URL:
https://mcp.slatebuilder.io/mcpStep 4: Authorize
Section titled “Step 4: Authorize”Codex opens a browser window for sign-in as soon as you add the server. Authorize the connection with your Slate account. Once you authorize, Codex stays connected.
Verify the connection
Section titled “Verify the connection”Try asking Codex:
“Check my Slate credit balance”
If everything is connected, Codex will call the check_credits tool and show your current balance.
Example prompts
Section titled “Example prompts”- “Create a 30-minute onboarding course for new hires”
- “List my courses sorted by last updated”
- “Preview an outline for a customer service course”
- “Open a review on my onboarding course”
- “Get engagement stats for my tracked links”
Troubleshooting
Section titled “Troubleshooting”Codex doesn’t recognize Slate tools - check that Slate appears under Settings > MCP Servers and that Codex Desktop has been restarted since you added it.
Authorization browser window doesn’t open - ensure your default browser is set and try again.
Tools return errors - you may have hit a rate limit. See Usage & Limits for details.