n8n MCP Server

Instructions

Implementation Reference

• src/tools/variables.ts:93-101 (handler)

  The handler function for 'n8n_get_variable' that fetches a variable by ID from the n8n API.

    async (params: z.infer<typeof IdParamSchema>) => {
      const variable = await get<N8nVariable>(`/variables/${params.id}`);
      
      return {
        content: [{ type: 'text', text: formatVariable(variable) }],
        structuredContent: variable
      };
    }
  );

• src/tools/variables.ts:74-92 (registration)

  Registration of the 'n8n_get_variable' tool using the IdParamSchema input schema.

    server.registerTool(
      'n8n_get_variable',
      {
        title: 'Get n8n Variable',
        description: `Get a specific variable by ID.
  
  Args:
    - id (string): Variable ID
  
  Returns:
    Variable details with id, key, and value.`,
        inputSchema: IdParamSchema,
        annotations: {
          readOnlyHint: true,
          destructiveHint: false,
          idempotentHint: true,
          openWorldHint: false
        }
      },