feat(mcp): Add MCP server routes & dedicated customization

packages/forest_admin_agent/lib/forest_admin_agent/http/router.rb

@@ -34,6 +34,14 @@ def self.cache_disabled?
         false
       end
 
+      def self.mcp_server_enabled?
+        config = ForestAdminAgent::Facades::Container.config_from_cache
+        config&.dig(:enable_mcp_server) == true
+      rescue StandardError
+        # If config is not available or an error occurs, default to MCP disabled
+        false
+      end
+
       def self.reset_cached_routes!
         @mutex.synchronize do
           @cached_routes = nil
@@ -66,6 +74,16 @@ def self.routes
           { name: 'update_field', handler: -> { Resources::UpdateField.new.routes } }
         ]
 
+        # Add MCP routes only if enabled via configuration
+        if mcp_server_enabled?
+          route_sources += [
+            { name: 'mcp_oauth_metadata', handler: -> { Mcp::OAuthMetadata.new.routes } },
+            { name: 'mcp_oauth_authorize', handler: -> { Mcp::OAuthAuthorize.new.routes } },
+            { name: 'mcp_oauth_token', handler: -> { Mcp::OAuthToken.new.routes } },
+            { name: 'mcp_endpoint', handler: -> { Mcp::McpEndpoint.new.routes } }
+          ]
+        end
+
         all_routes = {}
 
         route_sources.each do |source|

packages/forest_admin_agent/lib/forest_admin_agent/mcp/activity_log_creator.rb

@@ -0,0 +1,76 @@
+require 'faraday'
+require 'json'
+
+module ForestAdminAgent
+  module Mcp
+    class ActivityLogCreator
+      ACTION_TO_TYPE = {
+        'index' => 'read',
+        'search' => 'read',
+        'filter' => 'read',
+        'listHasMany' => 'read',
+        'actionForm' => 'read',
+        'action' => 'write',
+        'create' => 'write',
+        'update' => 'write',
+        'delete' => 'write',
+        'availableActions' => 'read',
+        'availableCollections' => 'read'
+      }.freeze
+
+      def self.create(forest_server_url, auth_info, action, extra = {})
+        type = ACTION_TO_TYPE[action]
+        raise "Unknown action type: #{action}" unless type
+
+        forest_server_token = auth_info.dig(:extra, :forest_server_token)
+        rendering_id = auth_info.dig(:extra, :rendering_id)
+
+        client = Faraday.new(forest_server_url) do |conn|
+          conn.headers['Content-Type'] = 'application/json'
+          conn.headers['Forest-Application-Source'] = 'MCP'
+          conn.headers['Authorization'] = "Bearer #{forest_server_token}"
+        end
+
+        records = extra[:record_ids] || (extra[:record_id] ? [extra[:record_id]] : [])
+
+        payload = {
+          data: {
+            id: 1,
+            type: 'activity-logs-requests',
+            attributes: {
+              type: type,
+              action: action,
+              label: extra[:label],
+              records: records.map(&:to_s)
+            }.compact,
+            relationships: {
+              rendering: {
+                data: {
+                  id: rendering_id.to_s,
+                  type: 'renderings'
+                }
+              },
+              collection: {
+                data: if extra[:collection_name]
+                        {
+                          id: extra[:collection_name],
+                          type: 'collections'
+                        }
+                      end
+              }
+            }
+          }
+        }
+
+        response = client.post('/api/activity-logs-requests', payload.to_json)
+
+        return if response.success?
+
+        Facades::Container.logger.log(
+          'Warn',
+          "[MCP] Failed to create activity log: #{response.body}"
+        )
+      end
+    end
+  end
+end

packages/forest_admin_agent/lib/forest_admin_agent/mcp/agent_caller.rb

@@ -0,0 +1,82 @@
+require 'faraday'
+require 'json'
+
+module ForestAdminAgent
+  module Mcp
+    class AgentCaller
+      def initialize(auth_info)
+        @token = auth_info[:token]
+        @forest_server_token = auth_info.dig(:extra, :forest_server_token)
+        @api_endpoint = auth_info.dig(:extra, :environment_api_endpoint)
+      end
+
+      def collection(name)
+        CollectionClient.new(name, @forest_server_token, @api_endpoint)
+      end
+
+      class CollectionClient
+        def initialize(name, token, api_endpoint)
+          @name = name
+          @token = token
+          @api_endpoint = api_endpoint
+        end
+
+        def list(params = {})
+          payload = build_list_payload(params)
+
+          response = http_client.post("/forest/rpc/#{@name}/list", payload.to_json)
+
+          handle_response(response)
+        end
+
+        private
+
+        def build_list_payload(params)
+          payload = {}
+
+          payload[:filters] = params[:filters] if params[:filters]
+
+          payload[:search] = params[:search] if params[:search]
+
+          if params[:sort]
+            payload[:sort] = [
+              {
+                field: params[:sort][:field],
+                ascending: params[:sort][:ascending]
+              }
+            ]
+          end
+
+          payload
+        end
+
+        def handle_response(response)
+          unless response.success?
+            error_body = parse_error_body(response)
+            raise ForestAdminAgent::Http::Exceptions::BadRequestError, error_body
+          end
+
+          JSON.parse(response.body)
+        end
+
+        def parse_error_body(response)
+          body = response.body
+
+          return body if body.is_a?(String) && !body.empty?
+
+          return body['error'] || body['message'] || body.to_json if body.is_a?(Hash)
+
+          "Request failed with status #{response.status}"
+        end
+
+        def http_client
+          @http_client ||= Faraday.new(@api_endpoint) do |conn|
+            conn.headers['Content-Type'] = 'application/json'
+            conn.headers['Authorization'] = "Bearer #{@token}"
+            conn.ssl.verify = !ForestAdminAgent::Facades::Container.cache(:debug)
+          end
+        end
+      end
+    end
+  end
+end

packages/forest_admin_agent/lib/forest_admin_agent/mcp/error_parser.rb

@@ -0,0 +1,37 @@
+module ForestAdminAgent
+  module Mcp
+    class ErrorParser
+      def self.parse(error)
+        return error.message if error.is_a?(StandardError)
+
+        parse_from_string(error.to_s)
+      end
+
+      def self.parse_from_string(error_string)
+        return nil if error_string.nil? || error_string.empty?
+
+        # Try to parse as JSON
+        begin
+          parsed = JSON.parse(error_string)
+          extract_from_json(parsed)
+        rescue JSON::ParserError
+          # Not JSON, return as-is
+          error_string
+        end
+      end
+
+      def self.extract_from_json(parsed)
+        # Handle JSON:API error format
+        if parsed.is_a?(Hash) && parsed['errors'].is_a?(Array)
+          errors = parsed['errors']
+          return errors.filter_map { |e| e['detail'] || e['title'] || e['name'] }.join(', ')
+        end
+
+        # Handle simple error object
+        return parsed['detail'] || parsed['message'] || parsed['error'] || parsed.to_s if parsed.is_a?(Hash)
+
+        parsed.to_s
+      end
+    end
+  end
+end

packages/forest_admin_agent/lib/forest_admin_agent/mcp/filter_schema.rb

@@ -0,0 +1,89 @@
+module ForestAdminAgent
+  module Mcp
+    class FilterSchema
+      OPERATORS = %w[
+        Equal
+        NotEqual
+        LessThan
+        GreaterThan
+        LessThanOrEqual
+        GreaterThanOrEqual
+        Match
+        NotContains
+        NotIContains
+        LongerThan
+        ShorterThan
+        IncludesAll
+        IncludesNone
+        Today
+        Yesterday
+        PreviousMonth
+        PreviousQuarter
+        PreviousWeek
+        PreviousYear
+        PreviousMonthToDate
+        PreviousQuarterToDate
+        PreviousWeekToDate
+        PreviousXDaysToDate
+        PreviousXDays
+        PreviousYearToDate
+        Present
+        Blank
+        Missing
+        In
+        NotIn
+        StartsWith
+        EndsWith
+        Contains
+        IStartsWith
+        IEndsWith
+        IContains
+        Like
+        ILike
+        Before
+        After
+        AfterXHoursAgo
+        BeforeXHoursAgo
+        Future
+        Past
+      ].freeze
+
+      AGGREGATORS = %w[And Or].freeze
+
+      def self.json_schema
+        {
+          oneOf: [
+            leaf_schema,
+            branch_schema
+          ]
+        }
+      end
+
+      def self.leaf_schema
+        {
+          type: 'object',
+          properties: {
+            field: { type: 'string' },
+            operator: { type: 'string', enum: OPERATORS },
+            value: {}
+          },
+          required: %w[field operator]
+        }
+      end
+
+      def self.branch_schema
+        {
+          type: 'object',
+          properties: {
+            aggregator: { type: 'string', enum: AGGREGATORS },
+            conditions: {
+              type: 'array',
+              items: { '$ref': '#' }
+            }
+          },
+          required: %w[aggregator conditions]
+        }
+      end
+    end
+  end
+end

packages/forest_admin_agent/lib/forest_admin_agent/mcp/invalid_client_error.rb

@@ -0,0 +1,5 @@
+module ForestAdminAgent
+  module Mcp
+    class InvalidClientError < StandardError; end
+  end
+end

packages/forest_admin_agent/lib/forest_admin_agent/mcp/invalid_request_error.rb

@@ -0,0 +1,5 @@
+module ForestAdminAgent
+  module Mcp
+    class InvalidRequestError < StandardError; end
+  end
+end

packages/forest_admin_agent/lib/forest_admin_agent/mcp/invalid_token_error.rb

@@ -0,0 +1,5 @@
+module ForestAdminAgent
+  module Mcp
+    class InvalidTokenError < StandardError; end
+  end
+end