In yogic tradition, Khechari Mudra holds a revered position with its origin rooted in various ancient spiritual texts. In Hindu mythology, Shiva is the first Yogi (Adi Yogi) who is said to have shared the secrets of Yoga including the advanced practices like Khechari Mudra with his consort Parvati and other sages. Reference can be had from Shiva Samhita.
In contrast, no single person can be credited with starting the Khechari Mudra. Several Yogis practiced and gained their expertise in Khechari Mudra and modified/refined over time and this has become an integral part of advanced yogic discipline.
Different Yogis called this Mudra by different names, viz. Khechari Mudra, Nabha Mudra and Lambhika Yoga. Its presence in classical texts ensures that it remains accessible to modern practitioners seeking to deepen their spiritual journey. This mudra is highly helpful for every Yogi to attain their salvation.