Use Kerux from your AI assistant (MCP)

https://www.usekerux.com/api/mcp

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claude.ai and ChatGPT (sign in, no key)

• Verified app when it’s claude.ai or ChatGPT: Kerux recognizes them by where they send you back (claude.ai, chatgpt.com).
• Any other app shows “Name given by the app” and a red warning with the site it sends you back to. Anyone can call an app “Claude”: allow it only if you know that site and just asked to connect it.
• The workspace. The app works only in that one. To use another workspace, connect again and pick it.
• The permissions. There is never an “everything” choice: an app can’t change billing, members or API keys, and it can’t set up webhooks (sending your data to another service needs an API key).

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What a connected app can’t do

• Send your contacts’ data to a new place. It can’t add a webhook or HTTP step to a new address, or an Always-on box that calls a webhook or an API, and it can’t publish or launch a campaign whose steps send to an address the live campaign doesn’t. You add those in Kerux, where you see where the data goes. Steps already live keep working and publish as before.
• Spend money or change keys. Your Twilio keys and connecting a Bluesky account are done in Kerux, or with an admin API key.
• Say that all your contacts agreed to texts or WhatsApp. Turning on Contacts’ consent in Settings > Sending rules is done by an owner or admin in Kerux. No app or API key can turn it on.
• Start whole audiences without the contacts permission. Sending a broadcast, a trigger that starts everyone in a segment, list or tag on a schedule (or on a date), trigger URLs and turning on Auto-start new contacts need Start campaigns and broadcasts for your contacts.
• Delete more than 100 contacts a day. Each delete is recorded with the app that made it. Delete more in Contacts.
• Read secret addresses. Call and booking-tool intake URLs show only their host; trigger URLs need the contacts permission.

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Claude Code, Cursor and desktop apps (API key)

claude mcp add --transport http kerux https://www.usekerux.com/api/mcp \
  --header "Authorization: Bearer YOUR_KEY"

{
  "mcpServers": {
    "kerux": {
      "url": "https://www.usekerux.com/api/mcp",
      "headers": { "Authorization": "Bearer YOUR_KEY" }
    }
  }
}

{
  "mcpServers": {
    "kerux": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://www.usekerux.com/api/mcp",
        "--header",
        "Authorization: Bearer YOUR_KEY"
      ]
    }
  }
}

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Connected apps and disconnecting

• Click Disconnect to end an app’s access. It stops working on its next request.
• A member who leaves the workspace takes their connected apps with them.
• To change an app’s permissions, disconnect it and connect again.
• A connection lasts 90 days. After that the assistant asks you to sign in to Kerux again.
• Apps connected with a key stop when you revoke the key in API keys.

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Things to ask

• “Why is Ana stuck?”
• “Build a 3-step campaign for agency owners: an invitation, then two short follow-ups.”
• “Is my Q4 campaign ready to launch? What would block it?”
• “Why is the Webinar campaign so slow this week?”
• “What needs my attention today?”
• “Add these 10 LinkedIn profiles to my Webinar list.”
• “Summarize this week’s replies in my Q4 campaign.”
• “How many invitations did each account send this week, and how many were accepted?”

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Tools