diff --git a/app/controllers/cards/pins_controller.rb b/app/controllers/cards/pins_controller.rb
index f8da07da31..d46c6a48df 100644
--- a/app/controllers/cards/pins_controller.rb
+++ b/app/controllers/cards/pins_controller.rb
@@ -9,14 +9,22 @@ def create
     @pin = @card.pin_by Current.user
 
     broadcast_add_pin_to_tray
-    render_pin_button_replacement
+
+    respond_to do |format|
+      format.turbo_stream { render_pin_button_replacement }
+      format.json { head :no_content }
+    end
   end
 
   def destroy
     @pin = @card.unpin_by Current.user
 
     broadcast_remove_pin_from_tray
-    render_pin_button_replacement
+
+    respond_to do |format|
+      format.turbo_stream { render_pin_button_replacement }
+      format.json { head :no_content }
+    end
   end
 
   private
diff --git a/app/controllers/my/pins_controller.rb b/app/controllers/my/pins_controller.rb
index 4468c75d5c..18b58910f2 100644
--- a/app/controllers/my/pins_controller.rb
+++ b/app/controllers/my/pins_controller.rb
@@ -1,6 +1,15 @@
 class My::PinsController < ApplicationController
   def index
-    @pins = Current.user.pins.includes(:card).ordered.limit(20)
+    @pins = user_pins
     fresh_when etag: [ @pins, @pins.collect(&:card) ]
   end
+
+  private
+    def user_pins
+      Current.user.pins.includes(:card).ordered.limit(pins_limit)
+    end
+
+    def pins_limit
+      request.format.json? ? 100 : 20
+    end
 end
diff --git a/app/views/my/pins/index.json.jbuilder b/app/views/my/pins/index.json.jbuilder
new file mode 100644
index 0000000000..f3a39ae845
--- /dev/null
+++ b/app/views/my/pins/index.json.jbuilder
@@ -0,0 +1,3 @@
+json.array! @pins do |pin|
+  json.partial! "cards/card", card: pin.card
+end
diff --git a/docs/API.md b/docs/API.md
index f7bdacb306..3a68c46dde 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -805,6 +805,79 @@ __Response:__
 
 Returns `204 No Content` on success.
 
+## Pins
+
+Pins let users keep quick access to important cards.
+
+### `POST /:account_slug/cards/:card_number/pin`
+
+Pins a card for the current user.
+
+__Response:__
+
+Returns `204 No Content` on success.
+
+### `DELETE /:account_slug/cards/:card_number/pin`
+
+Unpins a card for the current user.
+
+__Response:__
+
+Returns `204 No Content` on success.
+
+### `GET /my/pins`
+
+Returns the current user's pinned cards. This endpoint is not paginated and returns up to 100 cards.
+
+__Response:__
+
+```json
+[
+  {
+    "id": "03f5vaeq985jlvwv3arl4srq2",
+    "number": 1,
+    "title": "First!",
+    "status": "published",
+    "description": "Hello, World!",
+    "description_html": "<div class=\"action-text-content\"><p>Hello, World!</p></div>",
+    "image_url": null,
+    "tags": ["programming"],
+    "golden": false,
+    "last_active_at": "2025-12-05T19:38:48.553Z",
+    "created_at": "2025-12-05T19:38:48.540Z",
+    "url": "http://fizzy.localhost:3006/897362094/cards/4",
+    "board": {
+      "id": "03f5v9zkft4hj9qq0lsn9ohcm",
+      "name": "Fizzy",
+      "all_access": true,
+      "created_at": "2025-12-05T19:36:35.534Z",
+      "url": "http://fizzy.localhost:3006/897362094/boards/03f5v9zkft4hj9qq0lsn9ohcm",
+      "creator": {
+        "id": "03f5v9zjw7pz8717a4no1h8a7",
+        "name": "David Heinemeier Hansson",
+        "role": "owner",
+        "active": true,
+        "email_address": "david@example.com",
+        "created_at": "2025-12-05T19:36:35.401Z",
+        "url": "http://fizzy.localhost:3006/897362094/users/03f5v9zjw7pz8717a4no1h8a7",
+        "avatar_url": "http://fizzy.localhost:3006/897362094/users/03f5v9zjw7pz8717a4no1h8a7/avatar"
+      }
+    },
+    "creator": {
+      "id": "03f5v9zjw7pz8717a4no1h8a7",
+      "name": "David Heinemeier Hansson",
+      "role": "owner",
+      "active": true,
+      "email_address": "david@example.com",
+      "created_at": "2025-12-05T19:36:35.401Z",
+      "url": "http://fizzy.localhost:3006/897362094/users/03f5v9zjw7pz8717a4no1h8a7",
+      "avatar_url": "http://fizzy.localhost:3006/897362094/users/03f5v9zjw7pz8717a4no1h8a7/avatar"
+    },
+    "comments_url": "http://fizzy.localhost:3006/897362094/cards/4/comments"
+  }
+]
+```
+
 ## Comments
 
 Comments are attached to cards and support rich text.
diff --git a/test/controllers/cards/pins_controller_test.rb b/test/controllers/cards/pins_controller_test.rb
index 3bc5698277..db26a12e71 100644
--- a/test/controllers/cards/pins_controller_test.rb
+++ b/test/controllers/cards/pins_controller_test.rb
@@ -17,6 +17,17 @@ class Cards::PinsControllerTest < ActionDispatch::IntegrationTest
     assert_response :success
   end
 
+  test "create as JSON" do
+    card = cards(:layout)
+
+    assert_not card.pinned_by?(users(:kevin))
+
+    post card_pin_path(card), as: :json
+
+    assert_response :no_content
+    assert card.reload.pinned_by?(users(:kevin))
+  end
+
   test "destroy" do
     assert_changes -> { cards(:shipping).pinned_by?(users(:kevin)) }, from: true, to: false do
       perform_enqueued_jobs do
@@ -28,4 +39,15 @@ class Cards::PinsControllerTest < ActionDispatch::IntegrationTest
 
     assert_response :success
   end
+
+  test "destroy as JSON" do
+    card = cards(:shipping)
+
+    assert card.pinned_by?(users(:kevin))
+
+    delete card_pin_path(card), as: :json
+
+    assert_response :no_content
+    assert_not card.reload.pinned_by?(users(:kevin))
+  end
 end
diff --git a/test/controllers/my/pins_controller_test.rb b/test/controllers/my/pins_controller_test.rb
index 3c8ca33e22..daff963549 100644
--- a/test/controllers/my/pins_controller_test.rb
+++ b/test/controllers/my/pins_controller_test.rb
@@ -11,4 +11,14 @@ class My::PinsControllerTest < ActionDispatch::IntegrationTest
     assert_response :success
     assert_select "div", text: /#{users(:kevin).pins.first.card.title}/
   end
+
+  test "index as JSON" do
+    expected_ids = users(:kevin).pins.ordered.pluck(:card_id)
+
+    get my_pins_path(format: :json)
+
+    assert_response :success
+    assert_equal expected_ids.count, @response.parsed_body.count
+    assert_equal expected_ids, @response.parsed_body.map { |card| card["id"] }
+  end
 end