diff --git a/app/controllers/cards/comments/reactions_controller.rb b/app/controllers/cards/comments/reactions_controller.rb
index c65d34291..0f1277a3c 100644
--- a/app/controllers/cards/comments/reactions_controller.rb
+++ b/app/controllers/cards/comments/reactions_controller.rb
@@ -13,10 +13,20 @@ class Cards::Comments::ReactionsController < ApplicationController
 
   def create
     @reaction = @comment.reactions.create!(params.expect(reaction: :content))
+
+    respond_to do |format|
+      format.turbo_stream
+      format.json { head :created }
+    end
   end
 
   def destroy
     @reaction.destroy
+
+    respond_to do |format|
+      format.turbo_stream
+      format.json { head :no_content }
+    end
   end
 
   private
diff --git a/app/views/cards/_card.json.jbuilder b/app/views/cards/_card.json.jbuilder
index 976785b41..a7116d7dd 100644
--- a/app/views/cards/_card.json.jbuilder
+++ b/app/views/cards/_card.json.jbuilder
@@ -23,4 +23,6 @@ json.cache! [ card, card.column&.color ] do
   json.creator do
     json.partial! "users/user", user: card.creator
   end
+
+  json.comments_url card_comments_url(card)
 end
diff --git a/app/views/cards/comments/reactions/_reaction.json.jbuilder b/app/views/cards/comments/reactions/_reaction.json.jbuilder
new file mode 100644
index 000000000..2c743b7c9
--- /dev/null
+++ b/app/views/cards/comments/reactions/_reaction.json.jbuilder
@@ -0,0 +1,5 @@
+json.(reaction, :id, :content)
+json.reacter do
+  json.partial! "users/user", user: reaction.reacter
+end
+json.url card_comment_reaction_url(reaction.comment.card, reaction.comment, reaction)
diff --git a/app/views/cards/comments/reactions/index.json.jbuilder b/app/views/cards/comments/reactions/index.json.jbuilder
new file mode 100644
index 000000000..5dd744f12
--- /dev/null
+++ b/app/views/cards/comments/reactions/index.json.jbuilder
@@ -0,0 +1 @@
+json.array! @comment.reactions.ordered, partial: "cards/comments/reactions/reaction", as: :reaction
diff --git a/test/controllers/cards/comments/reactions_controller_test.rb b/test/controllers/cards/comments/reactions_controller_test.rb
index 57d635e96..21a94c5f3 100644
--- a/test/controllers/cards/comments/reactions_controller_test.rb
+++ b/test/controllers/cards/comments/reactions_controller_test.rb
@@ -7,6 +7,11 @@ class Cards::Comments::ReactionsControllerTest < ActionDispatch::IntegrationTest
     @card = @comment.card
   end
 
+  test "index" do
+    get card_comment_reactions_path(@card, @comment)
+    assert_response :success
+  end
+
   test "create" do
     assert_difference -> { @comment.reactions.count }, 1 do
       post card_comment_reactions_path(@comment.card, @comment, format: :turbo_stream), params: { reaction: { content: "Great work!" } }
@@ -30,4 +35,29 @@ class Cards::Comments::ReactionsControllerTest < ActionDispatch::IntegrationTest
       assert_response :forbidden
     end
   end
+
+  test "index as JSON" do
+    get card_comment_reactions_path(@card, @comment), as: :json
+
+    assert_response :success
+    assert_equal @comment.reactions.count, @response.parsed_body.count
+  end
+
+  test "create as JSON" do
+    assert_difference -> { @comment.reactions.count }, 1 do
+      post card_comment_reactions_path(@card, @comment), params: { reaction: { content: "👍" } }, as: :json
+    end
+
+    assert_response :created
+  end
+
+  test "destroy as JSON" do
+    reaction = reactions(:david)
+
+    assert_difference -> { @comment.reactions.count }, -1 do
+      delete card_comment_reaction_path(@card, @comment, reaction), as: :json
+    end
+
+    assert_response :no_content
+  end
 end