Little of Aleppo has been excavated by archaeologists, knowledge about Niqmi-Epuh comes from tablets discovered at Alalaḫ.

[1] His existence is confirmed by a number of tablets with his seal on their envelope[2] Yarim-Lim king of Alalakh, uncle of Yarim-Lim II and vassal of Yamhad died during Niqmi-Epuh's reign and was succeeded by his son Ammitakum,[3] who started to assert Alalakh's semi-independence.

[4] The tablets mention Niqmi-Epuh's votive status which he dedicated to Hadad and placed it in that deity's Temple.

[6] Niqmi-Epuh's most celebrated deed was his conquest of the town Arazik, near Charchemish,[7] the fall of this city was important to the extent of being suitable for dating several legal cases.

He seems to have a number of sons, including Irkabtum who succeeded him immediately, prince Abba-El,[10] and possibly Yarim-Lim III.