Eucanippe agastachys is a species of mygalomorph spider in the Idiopidae family. It is endemic to Australia. It was described in 2018 by Australian arachnologists Michael Rix, Barbara York Main, Robert Raven and Mark Harvey.
The species occurs in south-west Western Australia, in the Avon Wheatbelt and Mallee bioregions. The type locality is Durokoppin Nature Reserve.