Troubleshooting: Claude does not connect or shows no tools

The sign-in window does not open or closes immediately

• Allow pop-ups for claude.ai and third-party cookies for the sign-in.
• Try a private browser window to rule out an old session.
• Team/Enterprise: ask the Claude organisation admin whether the PaperOffice connector is enabled.

"invalid_client" or "client not registered"

Claude registers itself with the PaperOffice server the first time it connects. If you see this message, remove the connector in Claude and add it again with the exact URL https://mcp.paperoffice.ai/claude. If it persists, open a ticket and include the time of the attempt.

Connected, but no PaperOffice tools appear

• Enable the tools for the conversation (tools icon next to the chat input) — Claude disables new connectors per chat by default.
• Start a new conversation; connectors added mid-conversation are sometimes not picked up.
• Disconnect and reconnect once.

"Unauthorized" during a tool call

The OAuth grant was revoked or expired. Reconnect in Settings → Connectors. If you use a token instead of OAuth, make sure it starts with po_ut_ or po_gt_ — po_sk_ and po_pk_ are blocked.

Claude finds no documents

• Ask for the workspace list first; the user connected may not have access to the workspace you expect.
• Check spelling of names; try a semantic search ("documents about …").
• Recently uploaded documents need a few seconds until OCR and indexing finish.

"Insufficient credits"

Top up credits in the PaperOffice app or enable auto-refill. See Credits and billing.

Still stuck?

Open a ticket in this portal. Please include: assistant and plan, the exact message, the time (with time zone) and, if possible, a screenshot without personal data.