gem 'mcp_on_ruby'

# config/initializers/mcp_on_ruby.rb McpOnRuby.configure do |config| config.authentication_required = true config.authentication_token = ENV['MCP_AUTH_TOKEN'] config.rate_limit_per_minute = 60 config.allowed_origins = [/\.yourdomain\.com$/] end Rails.application.configure do config.mcp.enabled = true config.mcp.auto_register_tools = true config.mcp.auto_register_resources = true end

# app/tools/user_manager_tool.rb class UserManagerTool < ApplicationTool def initialize super( name: 'user_manager', description: 'Manage application users', input_schema: { type: 'object', properties: { action: { type: 'string', enum: ['create', 'update', 'delete'] }, user_id: { type: 'integer' }, attributes: { type: 'object' } }, required: ['action'] } ) end protected def execute(arguments, context) case arguments['action'] when 'create' user = User.create!(arguments['attributes']) { success: true, user: user.as_json } when 'update' user = User.find(arguments['user_id']) user.update!(arguments['attributes']) { success: true, user: user.as_json } else { error: 'Unsupported action' } end end def authorize(context) # Add your authorization logic context[:authenticated] == true end end

# app/resources/user_stats_resource.rb class UserStatsResource < ApplicationResource def initialize super( uri: 'users/{id}/stats', name: 'User Statistics', description: 'Get detailed user statistics', mime_type: 'application/json' ) end protected def fetch_content(params, context) user = User.find(params['id']) { user_id: user.id, statistics: { posts_count: user.posts.count, comments_count: user.comments.count, last_login: user.last_login_at, account_created: user.created_at }, generated_at: Time.current.iso8601 } end def authorize(context) # Check if user can access this data context[:authenticated] == true end end