diff --git a/app/controllers/api/v1/gw_individual_scores_controller.rb b/app/controllers/api/v1/gw_individual_scores_controller.rb
index d46e88f..bd335fe 100644
--- a/app/controllers/api/v1/gw_individual_scores_controller.rb
+++ b/app/controllers/api/v1/gw_individual_scores_controller.rb
@@ -8,7 +8,8 @@ module Api
       before_action :restrict_access
       before_action :set_crew
       before_action :authorize_crew_member!
-      before_action :set_participation
+      before_action :set_participation, except: %i[create_by_event batch_by_event]
+      before_action :set_or_create_participation_by_event, only: %i[create_by_event batch_by_event]
       before_action :set_score, only: %i[update destroy]
 
       # POST /crew/gw_participations/:gw_participation_id/individual_scores
@@ -56,6 +57,68 @@ module Api
       def batch
         return render_unauthorized_response unless current_user.crew_officer?
 
+        process_batch_scores
+      end
+
+      # POST /crew/gw_events/:gw_event_id/individual_scores
+      # Auto-creates participation if needed, officers only
+      def create_by_event
+        return render_unauthorized_response unless current_user.crew_officer?
+
+        score = @participation.gw_individual_scores.build(score_params_with_player)
+        score.recorded_by = current_user
+
+        if score.save
+          render json: GwIndividualScoreBlueprint.render(score, view: :with_member, root: :individual_score), status: :created
+        else
+          render_validation_error_response(score)
+        end
+      end
+
+      # POST /crew/gw_events/:gw_event_id/individual_scores/batch
+      # Auto-creates participation if needed, officers only
+      def batch_by_event
+        return render_unauthorized_response unless current_user.crew_officer?
+
+        process_batch_scores
+      end
+
+      private
+
+      def set_crew
+        @crew = current_user.crew
+        raise CrewErrors::NotInCrewError unless @crew
+      end
+
+      def set_participation
+        @participation = @crew.crew_gw_participations.find(params[:gw_participation_id])
+      end
+
+      def set_or_create_participation_by_event
+        event = GwEvent.find(params[:gw_event_id])
+        @participation = @crew.crew_gw_participations.find_or_create_by!(gw_event: event)
+      end
+
+      def set_score
+        @score = @participation.gw_individual_scores.find(params[:id])
+      end
+
+      def score_params
+        params.require(:individual_score).permit(:crew_membership_id, :round, :score, :is_cumulative)
+      end
+
+      def score_params_with_player
+        params.require(:individual_score).permit(:crew_membership_id, :phantom_player_id, :round, :score, :is_cumulative)
+      end
+
+      def can_record_score_for?(membership_id)
+        return true if current_user.crew_officer?
+
+        # Regular members can only record their own scores
+        current_user.active_crew_membership&.id == membership_id
+      end
+
+      def process_batch_scores
         scores_params = params.require(:scores)
         results = []
         errors = []
@@ -63,6 +126,7 @@ module Api
         scores_params.each_with_index do |score_data, index|
           score = @participation.gw_individual_scores.find_or_initialize_by(
             crew_membership_id: score_data[:crew_membership_id],
+            phantom_player_id: score_data[:phantom_player_id],
             round: score_data[:round]
           )
           score.assign_attributes(
@@ -85,32 +149,6 @@ module Api
                  status: :multi_status
         end
       end
-
-      private
-
-      def set_crew
-        @crew = current_user.crew
-        raise CrewErrors::NotInCrewError unless @crew
-      end
-
-      def set_participation
-        @participation = @crew.crew_gw_participations.find(params[:gw_participation_id])
-      end
-
-      def set_score
-        @score = @participation.gw_individual_scores.find(params[:id])
-      end
-
-      def score_params
-        params.require(:individual_score).permit(:crew_membership_id, :round, :score, :is_cumulative)
-      end
-
-      def can_record_score_for?(membership_id)
-        return true if current_user.crew_officer?
-
-        # Regular members can only record their own scores
-        current_user.active_crew_membership&.id == membership_id
-      end
     end
   end
 end
diff --git a/config/routes.rb b/config/routes.rb
index 6dbf4a4..5d6aedb 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -217,6 +217,11 @@ Rails.application.routes.draw do
           end
         end
       end
+      get 'gw_participations/by_event/:event_id', to: 'crew_gw_participations#by_event', as: :gw_participation_by_event
+
+      # Create individual scores by event (auto-creates participation if needed)
+      post 'gw_events/:gw_event_id/individual_scores', to: 'gw_individual_scores#create_by_event'
+      post 'gw_events/:gw_event_id/individual_scores/batch', to: 'gw_individual_scores#batch_by_event'
     end
 
     # Reading collections - works for any user with privacy check