MCP Test Server

Instructions

Implementation Reference

• src/domains/users.js:4-16 (handler)

  The static method getAll in UserService that executes the get_users tool logic: filters users by optional role and returns them.

  static getAll(filters = {}) {
    let filteredUsers = users;
    
    if (filters.role) {
      filteredUsers = filteredUsers.filter(user => user.role === filters.role);
    }
  
    return {
      success: true,
      data: filteredUsers,
      total: filteredUsers.length
    };
  }

• src/domains/users.js:72-85 (schema)

  Input/output schema definition for the get_users tool.

  {
    name: 'get_users',
    description: 'Get all users from the mock database',
    inputSchema: {
      type: 'object',
      properties: {
        role: {
          type: 'string',
          description: 'Filter users by role (admin, user, moderator)',
          enum: ['admin', 'user', 'moderator']
        }
      }
    }
  },

• mcp-server.js:38-46 (registration)

  Registration of available tools list, including the get_users schema via userToolSchemas.

  this.server.setRequestHandler(ListToolsRequestSchema, async () => {
    return {
      tools: [
        ...userToolSchemas,
        ...taskToolSchemas,
        searchToolSchema
      ]
    };
  });

• mcp-server.js:54-55 (registration)

  Dispatch/handling registration for the get_users tool call, invoking the handler.

  case 'get_users':
    return createMcpResponse(UserService.getAll(args));

• src/domains/users.js:1-16 (helper)

  Import of mock users data used by the get_users handler.

  import { users } from '../data/mockData.js';
  
  export class UserService {
    static getAll(filters = {}) {
      let filteredUsers = users;
      
      if (filters.role) {
        filteredUsers = filteredUsers.filter(user => user.role === filters.role);
      }
  
      return {
        success: true,
        data: filteredUsers,
        total: filteredUsers.length
      };
    }