Google Tasks MCP Server

Instructions

Implementation Reference

• src/index.ts:604-655 (handler)

  The asynchronous handler function that implements the 'create-task' tool logic. It checks authentication, constructs the task request body, inserts the task via the Google Tasks API, and handles success/error responses.

  async ({ tasklist, title, notes, due }) => {
    if (!isAuthenticated()) {
      return {
        isError: true,
        content: [
          {
            type: "text",
            text: "Not authenticated. Please use the 'authenticate' tool first.",
          },
        ],
      };
    }
  
    try {
      const requestBody: any = {
        title,
        status: "needsAction",
      };
  
      if (notes) requestBody.notes = notes;
      if (due) requestBody.due = due;
  
      const response = await tasks.tasks.insert({
        tasklist,
        requestBody,
      });
  
      return {
        content: [
          {
            type: "text",
            text: `Task created successfully:\n\n${JSON.stringify(
              response.data,
              null,
              2
            )}`,
          },
        ],
      };
    } catch (error) {
      console.error("Error creating task:", error);
      return {
        isError: true,
        content: [
          {
            type: "text",
            text: `Error creating task: ${error}`,
          },
        ],
      };
    }
  }

• src/index.ts:595-603 (schema)

  Zod schema defining the input parameters for the 'create-task' tool: tasklist (required string), title (required string), notes (optional string), due (optional string in RFC 3339 format).

  {
    tasklist: z.string().describe("Task list ID"),
    title: z.string().describe("Title of the task"),
    notes: z.string().optional().describe("Notes for the task"),
    due: z
      .string()
      .optional()
      .describe("Due date in RFC 3339 format (e.g., 2025-03-19T12:00:00Z)"),
  },

• src/index.ts:592-656 (registration)

  The server.tool() call that registers the 'create-task' tool with its name, description, input schema, and handler function.

  server.tool(
    "create-task",
    "Create a new task in a task list",
    {
      tasklist: z.string().describe("Task list ID"),
      title: z.string().describe("Title of the task"),
      notes: z.string().optional().describe("Notes for the task"),
      due: z
        .string()
        .optional()
        .describe("Due date in RFC 3339 format (e.g., 2025-03-19T12:00:00Z)"),
    },
    async ({ tasklist, title, notes, due }) => {
      if (!isAuthenticated()) {
        return {
          isError: true,
          content: [
            {
              type: "text",
              text: "Not authenticated. Please use the 'authenticate' tool first.",
            },
          ],
        };
      }
  
      try {
        const requestBody: any = {
          title,
          status: "needsAction",
        };
  
        if (notes) requestBody.notes = notes;
        if (due) requestBody.due = due;
  
        const response = await tasks.tasks.insert({
          tasklist,
          requestBody,
        });
  
        return {
          content: [
            {
              type: "text",
              text: `Task created successfully:\n\n${JSON.stringify(
                response.data,
                null,
                2
              )}`,
            },
          ],
        };
      } catch (error) {
        console.error("Error creating task:", error);
        return {
          isError: true,
          content: [
            {
              type: "text",
              text: `Error creating task: ${error}`,
            },
          ],
        };
      }
    }
  );