The Mayor of Mos Espa was a title that held the governmental position of mayor of the city of Mos Espa on the planet Tatooine. Mok Shaiz was the mayor of Mos Espa during the New Republic Era.
The Ithorian male Mok Shaiz governed as the mayor of the city Mos Espa and its surrounding plateaus on the planet Tatooine. Shaiz resided in a city hall within Mos Espa, where he was served by a Twi'lek majordomo and several guards, as well as a desk clerk. He took visitors' appointments from within his chambers in the city hall.
After the death of the crime lord Jabba the Hutt in 4 ABY, his majordomo, Bib Fortuna, took his place amid the newly-created power vacuum. Mos Espa subsequently became divided between three families—the Trandoshans, the Aqualish, and the Klatooinians. As Fortuna possessed less power than Jabba had, he had to rely on uneasy alliances, providing Shaiz with payment.
Around the year 9 ABY, the former bounty hunter Boba Fett, assisted by Master Assassin Fennec Shand, killed Fortuna, taking over his palace. Unknown to Fett, Shaiz had been bribed by the Pyke Syndicate, who the Mayor promised the territory that Fett had claimed. As Fett tried to rebuild the Hutt's criminal empire as his own, receiving tributes from many of those who formerly served under Jabba, Shaiz dispatched his majordomo to Fett's palace. Though Fett and Shand believed Shaiz himself would be visiting to pay tribute, the majordomo only offered his employer's welcome, informing the new Daimyo that the Mayor was occupied with pressing matters and instead requesting that Fett pay tribute to Shaiz. Fett did not provide any tribute for the Mayor, but allowed the majordomo to depart alive. Before leaving, the majordomo informed the two that Shaiz may take Fett's response differently, threatening the possibility of a further delegation in the near future.
After Fett and Shand were attacked by assassins of the Order of the Night Wind, they captured one, who alleged that he had been sent by the Mayor. Fett and Shand subsequently took the prisoner to the city hall, and the majordomo attempted to turn them away, claiming Shaiz was indisposed for the remainder of the week. Fett nonetheless forced his way into the Mayor's quarters as the majordomo apologized to Shaiz.
As the majordomo rewarded Fett at the Mayor's request, Fett declared he was no longer a bounty hunter, but Shaiz challenged his claim. Fett asserted that he would take the payment in place of the tribute he had expected from Shaiz, threatening that the Mayor only served as the Daimyo deemed. Shaiz, unfazed by the threat, suggested that Fett reconsider who was behind the Night Wind attack, claiming that he had no motive and that he served at Fett's pleasure, though the crime lord was unconvinced. Offering advice to Fett as his tribute, along with the currency provided earlier, Shaiz told him that running a family was a more complicated endeavor than bounty hunting; when Fett questioned him, the Mayor instructed the Daimyo to visit Madam Garsa Fwip's Sanctuary, where Fett learned that his position was disputed by the Hutts known as the Twins, a brother and sister who were cousins of Jabba.
The Mayor of Mos Espa was first mentioned in the premiere of the first season of the television series The Book of Boba Fett, which aired on Disney+ on December 29, 2021.