diff --git a/mconn-crypt.vapi b/mconn-crypt.vapi
new file mode 100644
index 0000000..1c7e218
--- /dev/null
+++ b/mconn-crypt.vapi
@@ -0,0 +1,13 @@
+namespace Mconn {
+	[CCode (cheader_filename = "mconn-crypt.h", type_id = "mconn_crypt_get_type ()")]
+	public class Crypt : GLib.Object {
+		[CCode (has_construct_function = false)]
+		protected Crypt ();
+		public GLib.ByteArray decrypt (GLib.Bytes data) throws GLib.Error;
+		[CCode (has_construct_function = false)]
+		public Crypt.for_key_path (string path);
+		public string get_public_key_pem ();
+		public unowned Mconn.Crypt @ref ();
+		public void unref ();
+	}
+}