The present invention relates to novel equipment's and methods for minimally invasive surgery emphasizing use of rigid platform for transoral endoscopic surgery of upper gastrointestinal tract. The present novel equipments and methods using the rigid platform aids in effective surgical procedures through natural orifice with accuracy, minimum bleeding, and under vision scarless major surgery of upper gastrointestinal (UGI) tract such as transoral cardiomytomy for achalasia cardia (TOEM), transoral fundoplication (TOF) for hiatus hernia, transoral bariatric surgery (TOBS), transoral oesophagectomy (TOO) for oesophageal cancers and NOTES UGI surgery. Present invention provides a Transoral Port (TOP) used for performing natural orifice surgery of the upper gastrointestinal tract； which mainly comprises of Sheath (SH), Blunt Introducer (BI), Telescope (TE), Diaphragm (DI), Silicon washers (SW), Tunnel pusher tube (TP), Airport (AP), Suction port (SP), Bevel (AB or PB), Markings (MA), Monitor (MO).
