DECLARE
l_ws_response_clob CLOB;
l_ws_url VARCHAR2(500) := 'https://YourURL';
BEGIN
apex_web_service.g_request_headers(1).name := 'Accept';
apex_web_service.g_request_headers(1).value := 'application/json; charset=utf-8';
apex_web_service.g_request_headers(2).name := 'Content-Type';
apex_web_service.g_request_headers(2).value := 'application/json; charset=utf-8';
l_ws_response_clob := apex_web_service.make_rest_request
(
p_url => l_ws_url,
p_http_method => 'GET'
);
dbms_output.put_line(dbms_lob.substr(l_ws_response_clob,24000,1));
dbms_output.put_line(dbms_lob.substr(l_ws_response_clob,24001,24000));
END;