Slave I, also spelled Slave One, was a modified Firespray-31-class patrol and attack craft used by the infamous Mandalorian bounty hunter Jango Fett before the Clone Wars and later his unaltered cloned son Boba Fett just prior to the Fall of the Republic and during the reign of the Galactic Empire. The ship in its original form was produced by a subsidiary company of Kuat Drive Yards, based on the planet Kuat.

The Slave I was a Firespray-31-class patrol and attack craft that was modified as far back as its time under Jango Fett. During this time, the only overt weapon systems leftover from its standard layout were the tail blaster cannons, but he still made sure to upgrade them, allowing these cannons to be fired with greater precision.

Already during its time under Jango, the Slave I was a very effective and customized ship, armed with superior shielding technology, high levels of endurance, and an arsenal of hidden and overt weapons. When his son, Boba Fett, took on the ship, he made his own modifications, so the Slave I was filled with heavy-duty shield generators, several new weapons systems, and various types of auxiliary sensor systems. Additionally, a secret military sensor, which could be used for jamming and masking, allowed the Slave I to disappear from the majority of scanning systems. The craft was equipped with overwhelming weaponry that could take out other heavily armed ships. However, with the exception of the twin blaster cannons, the weapons systems remained hidden to make the ship appear as if it was lightly armed.