diff --git a/src/cordova_googleplus.mli b/src/cordova_googleplus.mli
index 20fcb86..72b4a7f 100644
--- a/src/cordova_googleplus.mli
+++ b/src/cordova_googleplus.mli
@@ -1 +1,46 @@
-(*TODO*)
+[@@@js.stop]
+
+val available : unit -> bool
+
+[@@@js.start]
+
+[@@@js.implem
+let available () =
+  Js_of_ocaml.Js.Optdef.test Js_of_ocaml.Js.Unsafe.global##.plugins##.googleplus]
+
+module Login : sig
+  type parameters
+
+  type user
+
+  type error = Ojs.t
+
+  val parameters :
+    ?web_client_id:string ->
+    ?offline:bool ->
+    ?id_token:string ->
+    ?server_auth_code:string ->
+    ?profile:string ->
+    ?email:string ->
+    ?scopes:Ojs.t list ->
+    unit ->
+    parameters
+    [@@js.builder] [@@js.verbatim_names]
+
+  val login :
+    ?param:parameters ->
+    ?onInit:(user -> unit) ->
+    ?onError:(error -> unit) ->
+    unit ->
+    unit
+    [@@js.global "window.plugins.googleplus.login"]
+end
+
+type loginResponse
+
+val loginResponse : Login.user -> loginResponse [@@js.call]
+
+val id_token : loginResponse -> string [@@js.get "id_token"]
+
+val logout : ?onInit:(Ojs.t -> unit) -> ?onError:(Ojs.t -> unit) -> unit -> unit
+  [@@js.global "window.plugins.googleplus.logout"]