Indrapramati is a ṛṣi(rishi; sage). Somewhere in Purāṇas (Purana; Mythical Scriptures), he is also mentioned as Indrapramada. He is referred to as belonging to the clan of Sage Vaśiṣṭha (Vasistha), and a seer of mantras in Veda. In that case, whether Indrapramati — whom we know as the son of Vaśiṣṭha, is identical with Indrapratima.
While doing the classification of Veda, Maharṣi (Maharshi; Great sage)Paila, disciple of Vyāsadeva (Vyasadeva), divided Ṛgveda Saṁhitā (Rigveda Samjhita) into two parts and taught them to two of his disciples, Indrapramati and Vāskali (Vaskali). Indrapramati taught his portion to his disciple Māṇḍukeya(Mandukeya) or Mārkaṇḍeya (Markandeya). According to Viṣṇupurāṇa (Vishnupurana), Māṇḍukeya is not only the disciple of Indrapramati, but his son as well. It is mentioned in Purāṇas that he lived in Brahmakṣetra (Brahmakshetra).
Indrapramati was one of those sages who came to Kurukṣetra (Kurukshetra) to visit Bhīṣma on his bed of arrows. He also came to visit king Parīkṣit(Parikshit) while he was doing Prāyopaveśana (Prayopavesana).