na-adjective
available; obtainable
Used especially in computing and technical contexts to describe something that can be acquired or accessed.
このソフトウェアはオンラインで入手可能です。
This software is available online.
入手 is the act of obtaining something, while 入手可能 describes the state of being obtainable.
Compound of 入手 (obtain) + 可能 (possible).