diff --git a/src/matrix-http-api.c b/src/matrix-http-api.c
index 9df5ea6..eeb3c34 100644
--- a/src/matrix-http-api.c
+++ b/src/matrix-http-api.c
@@ -843,6 +843,32 @@ i_create_room(MatrixAPI *api,
           error);
 }
 
+static void
+i_initial_sync(MatrixAPI *api,
+               MatrixAPICallback callback,
+               gpointer user_data,
+               guint limit,
+               gboolean archived,
+               GError **err)
+{
+    GHashTable *params;
+
+    params = create_query_params();
+
+    if (limit != 0) {
+        g_hash_table_replace(params, "limit", g_strdup_printf("%d", limit));
+    }
+
+    if (archived) {
+        g_hash_table_replace(params, "archived", g_strdup("true"));
+    }
+
+    _send(MATRIX_HTTP_API(api),
+          callback, user_data,
+          "GET", "initialSync", params, NULL,
+          err);
+}
+
 static void
 matrix_http_api_matrix_api_init(MatrixAPIInterface *iface)
 {
@@ -854,4 +880,5 @@ matrix_http_api_matrix_api_init(MatrixAPIInterface *iface)
     iface->get_homeserver = i_get_homeserver;
     iface->login = i_login;
     iface->create_room = i_create_room;
+    iface->initial_sync = i_initial_sync;
 }
diff --git a/src/test-client.c b/src/test-client.c
index 73c64f6..7f3407d 100644
--- a/src/test-client.c
+++ b/src/test-client.c
@@ -41,6 +41,8 @@ create_room_finished(MatrixAPI *api,
     } else {
         g_printf("Room registered\n");
     }
+
+    matrix_api_initial_sync(MATRIX_API(api), NULL, NULL, 10, TRUE, NULL);
 }
 
 static void