diff --git a/lib/pleroma/web/mongooseim/mongoose_im_controller.ex b/lib/pleroma/web/mongooseim/mongoose_im_controller.ex
new file mode 100644
index 000000000..f8c634653
--- /dev/null
+++ b/lib/pleroma/web/mongooseim/mongoose_im_controller.ex
@@ -0,0 +1,41 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MongooseIM.MongooseIMController do
+  use Pleroma.Web, :controller
+  alias Comeonin.Pbkdf2
+  alias Pleroma.User
+  alias Pleroma.Repo
+
+  def user_exists(conn, %{"user" => username}) do
+    with %User{} <- Repo.get_by(User, nickname: username, local: true) do
+      conn
+      |> json(true)
+    else
+      _ ->
+        conn
+        |> put_status(:not_found)
+        |> json(false)
+    end
+  end
+
+  def check_password(conn, %{"user" => username, "pass" => password}) do
+    with %User{password_hash: password_hash} <-
+           Repo.get_by(User, nickname: username, local: true),
+         true <- Pbkdf2.checkpw(password, password_hash) do
+      conn
+      |> json(true)
+    else
+      false ->
+        conn
+        |> put_status(403)
+        |> json(false)
+
+      _ ->
+        conn
+        |> put_status(:not_found)
+        |> json(false)
+    end
+  end
+end
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 6a4e4a1d4..552778c92 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -704,6 +704,11 @@ defmodule Pleroma.Web.Router do
     end
   end
 
+  scope "/", Pleroma.Web.MongooseIM do
+    get("/user_exists", MongooseIMController, :user_exists)
+    get("/check_password", MongooseIMController, :check_password)
+  end
+
   scope "/", Fallback do
     get("/registration/:token", RedirectController, :registration_page)
     get("/:maybe_nickname_or_id", RedirectController, :redirector_with_meta)
diff --git a/test/web/mongooseim/mongoose_im_controller_test.exs b/test/web/mongooseim/mongoose_im_controller_test.exs
new file mode 100644
index 000000000..eb83999bb
--- /dev/null
+++ b/test/web/mongooseim/mongoose_im_controller_test.exs
@@ -0,0 +1,59 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MongooseIMController do
+  use Pleroma.Web.ConnCase
+  import Pleroma.Factory
+
+  test "/user_exists", %{conn: conn} do
+    _user = insert(:user, nickname: "lain")
+    _remote_user = insert(:user, nickname: "alice", local: false)
+
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :user_exists), user: "lain")
+      |> json_response(200)
+
+    assert res == true
+
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :user_exists), user: "alice")
+      |> json_response(404)
+
+    assert res == false
+
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :user_exists), user: "bob")
+      |> json_response(404)
+
+    assert res == false
+  end
+
+  test "/check_password", %{conn: conn} do
+    user = insert(:user, password_hash: Comeonin.Pbkdf2.hashpwsalt("cool"))
+
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :check_password), user: user.nickname, pass: "cool")
+      |> json_response(200)
+
+    assert res == true
+
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :check_password), user: user.nickname, pass: "uncool")
+      |> json_response(403)
+
+    assert res == false
+
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :check_password), user: "nobody", pass: "cool")
+      |> json_response(404)
+
+    assert res == false
+  end
+end