Background: In the last 3 decades, we have witnessed a significant shift from traditional surgical approaches to minimally invasive and robotic surgery for treating gastrointestinal (GI) conditions minimalizing the associated morbidity and mortality. Meanwhile, endoscopy has continually evolved, reshaping the landscape of both diagnostic and therapeutic procedures. The implementation of postsurgical endoscopy as a critical diagnostic tool is primarily due to its capabilities in early complication detection and providing a prompt therapy possibility, assessment of healing, management of symptoms, and surveillance for recurrence in malignancy cases. Summary: This review will first delve into the history of endoscopic developments, explore the various available postoperative diagnostic tools, focusing particularly on endoscopy and showing some real-life examples. Key Messages: As an essential diagnostic tool, postsurgical endoscopy plays a crucial role in the management of patients undergoing upper and lower GI surgeries. It is indispensable for ensuring an optimal postoperative result. The continuous advancements in endoscopic technology and techniques have significantly enhanced the diagnostic and therapeutic capabilities of this modality, solidifying its role in modern GI surgery. Integrating postsurgical endoscopy into routine clinical practice and learning curriculum for surgical residents is vital and essential for optimizing the postoperative care to ensure the best possible outcome for patients.

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