n8n MCP Server

Instructions

Implementation Reference

• src/tools/audit-utils.ts:261-305 (handler)

  The handler function for 'n8n_duplicate_workflow', which retrieves an existing workflow, prepares it for duplication (clearing ID/metadata), updates the name, sets it to inactive, and creates it as a new workflow via a POST request.

    server.registerTool(
      'n8n_duplicate_workflow',
      {
        title: 'Duplicate Workflow',
        description: `Create a copy of an existing workflow.
  
  Args:
    - id (string): Workflow ID to duplicate
    - newName (string, optional): Name for the copy (default: "Copy of [original name]")
  
  Returns:
    The duplicated workflow with its new ID.`,
        inputSchema: z.object({
          id: z.string().min(1).describe('Workflow ID to duplicate'),
          newName: z.string().optional().describe('Name for the copy')
        }).strict(),
        annotations: {
          readOnlyHint: false,
          destructiveHint: false,
          idempotentHint: false,
          openWorldHint: false
        }
      },
      async (params: { id: string; newName?: string }) => {
        // Get the original workflow
        const original = await get<Record<string, unknown>>(`/workflows/${params.id}`);
        
        // Prepare copy
        const copy = { ...original };
        delete copy.id;
        delete copy.createdAt;
        delete copy.updatedAt;
        delete copy.versionId;
        copy.name = params.newName || `Copy of ${original.name}`;
        copy.active = false; // Always deactivate copies
        
        // Create the copy
        const newWorkflow = await post<Record<string, unknown>>('/workflows', copy);
        
        return {
          content: [{ type: 'text', text: `✅ Workflow duplicated!\n\n- Original ID: ${params.id}\n- New ID: ${newWorkflow.id}\n- New Name: ${newWorkflow.name}` }],
          structuredContent: newWorkflow
        };
      }
    );