harvest-mcp-server

Instructions

Implementation Reference

• src/tools/tasks.ts:20-36 (handler)

  The ListTasksHandler class handles the execution of the list_tasks tool by validating input and calling the Harvest API.

  class ListTasksHandler implements ToolHandler {
    constructor(private readonly config: BaseToolConfig) {}
  
    async execute(args: Record<string, any>): Promise<CallToolResult> {
      try {
        const validatedArgs = validateInput(TaskQuerySchema, args, 'tasks query');
        logger.info('Listing tasks from Harvest API');
        const tasks = await this.config.harvestClient.getTasks(validatedArgs);
        
        return {
          content: [{ type: 'text', text: JSON.stringify(tasks, null, 2) }],
        };
      } catch (error) {
        return handleMCPToolError(error, 'list_tasks');
      }
    }
  }

• src/tools/tasks.ts:116-132 (registration)

  The list_tasks tool is defined and registered with its schema and handler within registerTaskTools.

  {
    tool: {
      name: 'list_tasks',
      description: 'Retrieve a list of tasks with optional filtering. Tasks are the building blocks for time tracking and can be assigned to projects.',
      inputSchema: {
        type: 'object',
        properties: {
          is_active: { type: 'boolean', description: 'Filter by active status' },
          updated_since: { type: 'string', format: 'date-time', description: 'Filter by tasks updated since this timestamp' },
          page: { type: 'number', minimum: 1, description: 'Page number for pagination' },
          per_page: { type: 'number', minimum: 1, maximum: 2000, description: 'Number of tasks per page (max 2000)' },
        },
        additionalProperties: false,
      },
    },
    handler: new ListTasksHandler(config),
  },