A Nigantha who had two interviews with the Buddha, as recorded in the Cúla Saccaka Sutta and Mahá Saccaka Sutta. He is addressed as Aggivessana, that being his gotta name (the Agnivesyáyanas).
Buddhaghosa says (MA.i.450; cf. J.iii.1, where Sivávatiká is called Avavádaká) that both his parents were Niganthas, skilled debaters, who married at the suggestion of the Licchavis, because they were unable to defeat each other in argument. The Licchavis provided for their maintenance. Four daughters were born to them: Saccá, Lolá, Patácárá and Sivávatiká. These engaged in a discussion with Sáriputta, and were defeated by him. Having then entered the Order, they became arahants. Saccaka was their brother and was the youngest of them. He was a teacher of the Licchavis and lived at Vesáli.
When Saccaka was defeated by the Buddha as stated in the Cúla-Saccaka Sutta, one of the Licchavis, Dummukha, compared him to a crab in a pool, its claws being smashed one after the other and unable to return to the pool. Saccaka, owned defeat, and begged the Buddha to take a meal at his house. The Buddha agreed, and Saccaka became his follower (M.i.234f).
It is said (MA.i.469f) that, in a later birth, long after the Buddha's death, Saccaka was born in Ceylon as the Thera Kála Buddharakkhita and attained arahantship.
Saccaka, is identified with Senaka of the Mahá Ummagga Játaka. J.vi.478.