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Connect Grok and Grok Bot

Add JustOnce as a custom connector on grok.com, or ask Grok Bot to add it in a chat. Then sign in once.

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Written by Aaron Wittman

xAI's Grok can use JustOnce in two places: Grok on grok.com, and Grok Bot, the always-on agent xAI built with Cursor.

Grok on grok.com

  1. On grok.com, open Connectors (grok.com/connectors), choose New Connector, then Custom.

  2. Name it JustOnce and enter the server URL https://mcp.justonce.ai exactly, with nothing added to the end.

  3. When Grok sends you to the JustOnce sign-in, sign in (or create your account there), then click Allow.

  4. In a chat, ask Grok "What do you remember about me?" to check the link.

Grok Bot

Grok Bot doesn't have a settings form for servers. You add one by asking it in a chat:

  1. Send Grok Bot a message such as "Add a custom MCP server called JustOnce at https://mcp.justonce.ai".

  2. Check the details it confirms back to you, then let it go ahead.

  3. Follow the sign-in link it gives you: sign in to JustOnce (or create your account), then click Allow.

  4. The JustOnce tools are available from your next message. Ask it what it knows about you.

At the time of writing Grok Bot is in beta and comes with SuperGrok plans and Cursor's paid plans; xAI decides who can use it.

Good to know

  • Grok and Grok Bot read and write the same memory as your other assistants.

  • Use the same sign-in method and email address you use everywhere else, or you'll create a second, empty account.

  • If the sign-in stops with The app's return address isn't one JustOnce trusts, tell us — xAI may have changed its sign-in address.

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