harvest-mcp-server

Instructions

Implementation Reference

• src/tools/expenses.ts:21-37 (handler)

  The handler class that executes the logic for 'list_expenses' by invoking the Harvest API client.

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

• src/tools/expenses.ts:135-157 (registration)

  Registration of the 'list_expenses' tool, including its schema and handler association.

  {
    tool: {
      name: 'list_expenses',
      description: 'Retrieve expenses with filtering by user, client, project, billing status, and date ranges. Returns paginated results with expense details.',
      inputSchema: {
        type: 'object',
        properties: {
          user_id: { type: 'number', description: 'Filter by user ID' },
          client_id: { type: 'number', description: 'Filter by client ID' },
          project_id: { type: 'number', description: 'Filter by project ID' },
          is_billed: { type: 'boolean', description: 'Filter by billing status' },
          is_closed: { type: 'boolean', description: 'Filter by closed status' },
          from: { type: 'string', format: 'date', description: 'Start date for date range filter (YYYY-MM-DD)' },
          to: { type: 'string', format: 'date', description: 'End date for date range filter (YYYY-MM-DD)' },
          updated_since: { type: 'string', format: 'date-time', description: 'Filter by expenses 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 expenses per page (max 2000)' },
        },
        additionalProperties: false,
      },
    },
    handler: new ListExpensesHandler(config),
  },