todoist-mcp

Instructions

Implementation Reference

• src/tools/tasks.ts:65-83 (registration)

  Registration and schema definition for the 'get_tasks_list' tool, specifying input parameters for filtering Todoist tasks and mapping to GET /tasks API endpoint.

  createApiHandler({
      name: 'get_tasks_list',
      description: 'Get tasks list from Todoist',
      schemaShape: {
          project_id: z.string().optional().describe('Filter by project'),
          section_id: z.string().optional().describe('Filter by section'),
          label: z.string().optional().describe('Filter by label'),
          filter: z
              .string()
              .optional()
              .describe(
                  'Natural language english filter like "search: keyword", "today", "date before: +4 hours", "date after: May 5", "no date", "no time", "overdue", "7 days & @waiting", "created before: -365 days", "assigned to: person", "added by: me", "#Project & !assigned", "subtask", "!subtask", "P1 | P2", "today & @email", "@work | @office", "(today | overdue) & #Work", "all & 7 days", "!assigned", "Today & !#Work"'
              ),
          ids: z.string().optional().describe('Comma-separated list of task IDs'),
          limit: z.number().optional().default(50),
      },
      method: 'GET',
      path: '/tasks',
  });

• src/utils/handlers.ts:92-146 (handler)

  Core handler logic for API-based tools like get_tasks_list: processes arguments into path and query params, validates path parameters, and calls todoistApi.get('/tasks', finalParams) for GET requests.

  const handler = async (args: z.infer<z.ZodObject<T>>): Promise<R> => {
      let finalPath = options.path;
      const pathParams: Record<string, string> = {};
  
      // Extract path parameters (e.g., {id}) and replace them with actual values
      const pathParamRegex = /{([^}]+)}/g;
      let match;
  
      while ((match = pathParamRegex.exec(options.path)) !== null) {
          const fullMatch = match[0]; // e.g., "{id}"
          const paramName = match[1]; // e.g., "id"
  
          if (args[paramName] === undefined) {
              throw new Error(`Path parameter ${paramName} is required but not provided`);
          }
  
          // Validate and encode path parameter using the centralized security function
          const safeParamValue = validatePathParameter(args[paramName], paramName);
          finalPath = finalPath.replace(fullMatch, safeParamValue);
          pathParams[paramName] = String(args[paramName]);
      }
  
      // Collect non-path parameters for query string or request body
      const otherParams = Object.entries(args).reduce(
          (acc, [key, value]) => {
              if (value !== undefined && !pathParams[key]) {
                  acc[key] = value;
              }
              return acc;
          },
          {} as Record<string, any>
      );
  
      // Apply custom parameter transformation if provided
      const finalParams = options.transformParams ? options.transformParams(args) : otherParams;
  
      // Execute the API request based on HTTP method
      let result;
      switch (options.method) {
          case 'GET':
              result = await todoistApi.get(finalPath, finalParams);
              break;
          case 'POST':
              log('POST', finalPath, finalParams);
              result = await todoistApi.post(finalPath, finalParams);
              break;
          case 'DELETE':
              result = await todoistApi.delete(finalPath);
              break;
      }
  
      // Apply result post-processing if provided
      return options.processResult ? options.processResult(result, args) : result;
  };

• src/utils/TodoistClient.ts:51-74 (helper)

  TodoistClient.get method that executes the HTTP GET request to Todoist REST API /tasks endpoint with query parameters, handling auth and response.

  async get(endpoint: string, params: Record<string, string> = {}): Promise<any> {
      let url = `${API_BASE_URL}${endpoint}`;
  
      const queryParams = new URLSearchParams();
      for (const [key, value] of Object.entries(params)) {
          if (value) {
              queryParams.append(key, value);
          }
      }
  
      const queryString = queryParams.toString();
      if (queryString) {
          url += `?${queryString}`;
      }
  
      log(`Making GET request to: ${url}`);
  
      const response = await fetch(url, {
          method: 'GET',
          headers: this.getHeaders(),
      });
  
      return this.handleResponse(response);
  }