+ * @param object Where to store the returned object - should call json_object_put on it - can be NULL
+ * @param error Where to store the copied returned error - should call free on it - can be NULL
+ * @param info Where to store the copied returned info - should call free on it - can be NULL
+ *
+ * @returns 0 in case of success or a negative value in case of error.
+ *
+ * @see afb_req_subcall
+ * @see afb_req_subcall_sync
+ * @see afb_api_call
+ */
+int afb_service_call_sync(
+ const char *api,
+ const char *verb,
+ struct json_object *args,
+ struct json_object **object,
+ char **error,
+ char **info);
+```
+
+## afb_service_call_legacy
+
+```C
+/**
+ * @deprecated try to use @ref afb_api_call instead
+ *
+ * Calls the 'verb' of the 'api' with the arguments 'args' and 'verb'
+ * in the name of the binding.
+ * The result of the call is delivered to the 'callback' function with
+ * the 'callback_closure'.
+ *
+ * For convenience, the function calls 'json_object_put' for 'args'.
+ * Thus, in the case where 'args' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
+ * The 'callback' receives 3 arguments:
+ * 1. 'closure' the user defined closure pointer 'closure',
+ * 2. 'status' a status being 0 on success or negative when an error occurred,
+ * 2. 'result' the resulting data as a JSON object.
+ *
+ * @param api The api name of the method to call
+ * @param verb The verb name of the method to call
+ * @param args The arguments to pass to the method
+ * @param callback The to call on completion
+ * @param closure The closure to pass to the callback
+ *
+ * @see also 'afb_api_call'
+ * @see also 'afb_api_call_sync'
+ * @see also 'afb_api_call_sync_legacy'
+ * @see also 'afb_req_subcall'
+ * @see also 'afb_req_subcall_sync'
+ */
+void afb_service_call_legacy(
+ const char *api,
+ const char *verb,
+ struct json_object *args,
+ void (*callback)(
+ void *closure,
+ int status,
+ struct json_object *result,
+ afb_api_t api),
+ void *closure);
+```
+
+## afb_service_call_sync_legacy
+
+```C
+/**
+ * @deprecated try to use @ref afb_api_call_sync instead
+ *
+ * Calls the 'verb' of the 'api' with the arguments 'args' and 'verb' in the
+ * name of the binding. 'result' will receive the response.
+ *
+ * For convenience, the function calls 'json_object_put' for 'args'.
+ * Thus, in the case where 'args' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
+ * @param api The api name of the method to call
+ * @param verb The verb name of the method to call
+ * @param args The arguments to pass to the method