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1. Add an "MCP Client" node to your workflow.
2. Configure it:
   • MCP Endpoint URL: https://api.klardaten.com/mcp
   • Authentication: MCP OAuth
3. Create a new credential under "Credential for MCP OAuth2 API".

4. In the credential:
   • Leave "Use Dynamic Client Registration" enabled.
   • Set "Server URL" to https://api.klardaten.com/mcp.
5. Click "Connect to MCP".

At the Klardaten sign-in, select API Key and paste the personal key you created from your invitation. If you already use a Klardaten email and password, you can sign in with those instead.

When authorization finishes, the tool list shows the available DATEVconnect tools.