diff --git a/docs/development/API/pleroma_api.md b/docs/development/API/pleroma_api.md
index a92c3c291..47fcb7479 100644
--- a/docs/development/API/pleroma_api.md
+++ b/docs/development/API/pleroma_api.md
@@ -725,3 +725,42 @@ Emoji reactions work a lot like favourites do. They make it possible to react to
 * Authentication: required
 * Params: none
 * Response: HTTP 200 on success, 500 on error
+
+## `/api/v1/pleroma/settings/:app`
+### Gets settings for some application
+* Method `GET`
+* Authentication: `read:accounts`
+
+* Response: JSON. The settings for that application, or empty object if there is none.
+* Example response:
+```json
+{
+  "some key": "some value"
+}
+```
+
+### Updates settings for some application
+* Method `PATCH`
+* Authentication: `write:accounts`
+* Request body: JSON object. The object will be merged recursively with old settings. If some field is set to null, it is removed.
+* Example request:
+```json
+{
+  "some key": "some value",
+  "key to remove": null,
+  "nested field": {
+    "some key": "some value",
+    "key to remove": null
+  }
+}
+```
+* Response: JSON. Updated (merged) settings for that application.
+* Example response:
+```json
+{
+  "some key": "some value",
+  "nested field": {
+    "some key": "some value",
+  }
+}
+```
diff --git a/lib/pleroma/web/api_spec/operations/pleroma_settings_operation.ex b/lib/pleroma/web/api_spec/operations/pleroma_settings_operation.ex
new file mode 100644
index 000000000..e2cef4f67
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/pleroma_settings_operation.ex
@@ -0,0 +1,72 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.PleromaSettingsOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["Settings"],
+      summary: "Get settings for an application",
+      description: "Get synchronized settings for an application",
+      operationId: "SettingsController.show",
+      parameters: [app_name_param()],
+      security: [%{"oAuth" => ["read:accounts"]}],
+      responses: %{
+        200 => Operation.response("object", "application/json", object())
+      }
+    }
+  end
+
+  def update_operation do
+    %Operation{
+      tags: ["Settings"],
+      summary: "Update settings for an application",
+      description: "Update synchronized settings for an application",
+      operationId: "SettingsController.update",
+      parameters: [app_name_param()],
+      security: [%{"oAuth" => ["write:accounts"]}],
+      requestBody: request_body("Parameters", update_request(), required: true),
+      responses: %{
+        200 => Operation.response("object", "application/json", object())
+      }
+    }
+  end
+
+  def app_name_param do
+    Operation.parameter(:app, :path, %Schema{type: :string}, "Application name",
+      example: "pleroma-fe",
+      required: true
+    )
+  end
+
+  def object do
+    %Schema{
+      title: "Settings object",
+      description: "The object that contains settings for the application.",
+      type: :object
+    }
+  end
+
+  def update_request do
+    %Schema{
+      title: "SettingsUpdateRequest",
+      type: :object,
+      description:
+        "The settings object to be merged with the current settings. To remove a field, set it to null.",
+      example: %{
+        "config1" => true,
+        "config2_to_unset" => nil
+      }
+    }
+  end
+end
diff --git a/lib/pleroma/web/pleroma_api/controllers/settings_controller.ex b/lib/pleroma/web/pleroma_api/controllers/settings_controller.ex
new file mode 100644
index 000000000..1136575b6
--- /dev/null
+++ b/lib/pleroma/web/pleroma_api/controllers/settings_controller.ex
@@ -0,0 +1,79 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.PleromaAPI.SettingsController do
+  use Pleroma.Web, :controller
+
+  alias Pleroma.Web.Plugs.OAuthScopesPlug
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["write:accounts"]} when action in [:update]
+  )
+
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["read:accounts"]} when action in [:show]
+  )
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PleromaSettingsOperation
+
+  @doc "GET /api/v1/pleroma/settings/:app"
+  def show(%{assigns: %{user: user}} = conn, %{app: app} = _params) do
+    conn
+    |> json(get_settings(user, app))
+  end
+
+  @doc "PATCH /api/v1/pleroma/settings/:app"
+  def update(%{assigns: %{user: user}, body_params: body_params} = conn, %{app: app} = _params) do
+    settings =
+      get_settings(user, app)
+      |> merge_recursively(body_params)
+
+    with changeset <-
+           Pleroma.User.update_changeset(
+             user,
+             %{pleroma_settings_store: %{app => settings}}
+           ),
+         {:ok, _} <- Pleroma.Repo.update(changeset) do
+      conn
+      |> json(settings)
+    end
+  end
+
+  defp merge_recursively(old, %{} = new) do
+    old = ensure_object(old)
+
+    Enum.reduce(
+      new,
+      old,
+      fn
+        {k, nil}, acc ->
+          Map.drop(acc, [k])
+
+        {k, %{} = new_child}, acc ->
+          Map.put(acc, k, merge_recursively(acc[k], new_child))
+
+        {k, v}, acc ->
+          Map.put(acc, k, v)
+      end
+    )
+  end
+
+  defp get_settings(user, app) do
+    user.pleroma_settings_store
+    |> Map.get(app, %{})
+    |> ensure_object()
+  end
+
+  defp ensure_object(%{} = object) do
+    object
+  end
+
+  defp ensure_object(_) do
+    %{}
+  end
+end
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index e953116c5..842596e97 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -463,6 +463,13 @@ defmodule Pleroma.Web.Router do
       get("/birthdays", AccountController, :birthdays)
     end
 
+    scope [] do
+      pipe_through(:authenticated_api)
+
+      get("/settings/:app", SettingsController, :show)
+      patch("/settings/:app", SettingsController, :update)
+    end
+
     post("/accounts/confirmation_resend", AccountController, :confirmation_resend)
   end
 
diff --git a/test/pleroma/web/pleroma_api/controllers/settings_controller_test.exs b/test/pleroma/web/pleroma_api/controllers/settings_controller_test.exs
new file mode 100644
index 000000000..e3c752d53
--- /dev/null
+++ b/test/pleroma/web/pleroma_api/controllers/settings_controller_test.exs
@@ -0,0 +1,126 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.PleromaAPI.SettingsControllerTest do
+  use Pleroma.Web.ConnCase
+
+  import Pleroma.Factory
+
+  describe "GET /api/v1/pleroma/settings/:app" do
+    setup do
+      oauth_access(["read:accounts"])
+    end
+
+    test "it gets empty settings", %{conn: conn} do
+      response =
+        conn
+        |> get("/api/v1/pleroma/settings/pleroma-fe")
+        |> json_response_and_validate_schema(:ok)
+
+      assert response == %{}
+    end
+
+    test "it gets settings", %{conn: conn, user: user} do
+      response =
+        conn
+        |> assign(
+          :user,
+          struct(user,
+            pleroma_settings_store: %{
+              "pleroma-fe" => %{
+                "foo" => "bar"
+              }
+            }
+          )
+        )
+        |> get("/api/v1/pleroma/settings/pleroma-fe")
+        |> json_response_and_validate_schema(:ok)
+
+      assert %{"foo" => "bar"} == response
+    end
+  end
+
+  describe "POST /api/v1/pleroma/settings/:app" do
+    setup do
+      settings = %{
+        "foo" => "bar",
+        "nested" => %{
+          "1" => "2"
+        }
+      }
+
+      user =
+        insert(
+          :user,
+          %{
+            pleroma_settings_store: %{
+              "pleroma-fe" => settings
+            }
+          }
+        )
+
+      %{conn: conn} = oauth_access(["write:accounts"], user: user)
+
+      %{conn: conn, user: user, settings: settings}
+    end
+
+    test "it adds keys", %{conn: conn} do
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> patch("/api/v1/pleroma/settings/pleroma-fe", %{
+          "foo" => "edited",
+          "bar" => "new",
+          "nested" => %{"3" => "4"}
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      assert response == %{
+               "foo" => "edited",
+               "bar" => "new",
+               "nested" => %{
+                 "1" => "2",
+                 "3" => "4"
+               }
+             }
+    end
+
+    test "it removes keys", %{conn: conn} do
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> patch("/api/v1/pleroma/settings/pleroma-fe", %{
+          "foo" => nil,
+          "bar" => nil,
+          "nested" => %{
+            "1" => nil,
+            "3" => nil
+          }
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      assert response == %{
+               "nested" => %{}
+             }
+    end
+
+    test "it does not override settings for other apps", %{
+      conn: conn,
+      user: user,
+      settings: settings
+    } do
+      conn
+      |> put_req_header("content-type", "application/json")
+      |> patch("/api/v1/pleroma/settings/admin-fe", %{"foo" => "bar"})
+      |> json_response_and_validate_schema(:ok)
+
+      user = Pleroma.User.get_by_id(user.id)
+
+      assert user.pleroma_settings_store == %{
+               "pleroma-fe" => settings,
+               "admin-fe" => %{"foo" => "bar"}
+             }
+    end
+  end
+end