Help with the Rechnungstool MCP server.

1. Check the complete URL, including /mcp.
2. Check whether your ChatGPT account offers Developer mode or your Claude account permits a custom connector.
3. Do not remove OAuth fields on a guess. Follow the current setup guide.
4. After a metadata change, start a new conversation and refresh the MCP connection.

Open the connection and check which tools the server exposes. Enable Rechnungstool in the tools or connectors menu of this chat. A configured connector is not automatically active in every conversation.

The anonymous invoice workflow does not need a Rechnungstool account. Account features for stored profiles, customers, items and invoices instead trigger OAuth sign-in. Before authorising, check which connection and data are involved.

Ask the assistant to summarise the draft first and finalise only after your confirmation. After successful finalisation, it should retrieve the ZUGFeRD PDF as a file resource. A text-only reply is not a completed invoice workflow.

Email freevallm@gmail.com. Include the AI assistant used, approximate time, affected step and visible error text. Do not send passwords, access tokens, full invoices or unnecessary personal data.

There is no guaranteed response time. Provider details are in the legal notice; data handling is described in the privacy notice.