Claude cannot sign out a device: „This connection may only read“

Area: Account and access · Updated: 1 Nov 2026 · Auf Deutsch · All articles

Symptoms

  • You asked Claude to sign out a browser, the X3 App or the Sales Engine, and it answered „This connection may only read, so it can end only itself“.
  • account_sessions_list shows every sign-in, but account_sessions_revoke refuses all entries except the Claude connection itself.

Cause

  • Ending a sign-in changes your account. A connection that was only allowed to read (for example only analytics:read) must not sign you out elsewhere; since the update of 1 Nov 2026 it may end only itself.

How to fix it

1. Sign the device out in the browser

  • In the dashboard: X3 Konto › Sicherheit › Angemeldete Geräte und Verbindungen › Abmelden
  • With Claude (MCP): No MCP tool (a read-only connection may not end other sign-ins; the list in the browser is the same as account_sessions_list)
  • Since the update of 1 Nov 2026.

Ends exactly that entry; the other devices keep working.

2. Or let Claude do it with a connection that may change something

  • In the dashboard: Claude › Einstellungen › Connectors › X3 › Trennen, then connect again
  • With Claude (MCP): account_sessions_revoke {"id":"3f1c2b9e-5a7d-4c11-9e2a-0b6d7c8e9f01"}

When you connect again, allow at least one permission that changes something (for example settings). Your role must allow it: viewers only read, so for them the browser is the way.

3. End the read-only Claude connection itself

  • In the dashboard: X3 Konto › Sicherheit › Angemeldete Geräte und Verbindungen › Abmelden
  • With Claude (MCP): account_sessions_revoke {"id":"7a2d9c41-0b3e-4f56-8c1d-2e9f6a7b8c90"}

Use the id of the entry with current: true; this works for every connection, read-only or not.

How to tell it worked

  • The device is gone from the list and asks for a new sign-in.

The list of your sign-ins is the same for every connection. Signing a place out is a change to your account, so it needs a connection that may change something, or your own click in X3 Konto.