The Xindi Council (sometimes abbreviated as the Council) was founded as an alliance between the five surviving Xindi species following the Xindi Civil War in the mid 21st century. The Council's primary mission was to found a new homeworld for the Xindi, after the destruction of Xindus in the war. (ENT: "The Xindi", "Stratagem")
The Council's founding was arranged by a race of extra-dimensional beings (later called the Guardians by the Xindi) to unite the five species and help them survive. It was not realized at the time that the Guardians sought to use the Xindi as pawns in the Temporal Cold War, aiming to prevent the founding of the United Federation of Planets. (ENT: "The Council")
Based on information provided by the Guardians, in the late 2140s, the Council authorized the construction of a massive superweapon to be used to destroy Earth. The Council was told that the Humans would be the cause of the destruction of the second Xindi homeworld in the 26th century. (ENT: "Damage") The construction of a bioweapon was also considered, but ultimately abandoned by the Council. (ENT: "Rajiin", "Carpenter Street")
As the humans continued searching for the weapon, the Council was barely able to keep the Reptilians and Insectoids from voting to destroy Enterprise. The patience of the Reptilians was lowered each time a failure occured in the weapon project. (ENT: Proving Ground)
The Xindi Council was often on the verge of breaking apart. It finally did so in February 2154, when the Arboreals, Primates, and Aquatics voted to delay the launch of the superweapon based upon evidence from Jonathan Archer. The Reptilians and Insectoids walked out of the Council, stealing the weapon on their own. (ENT: "The Council")
The Council consisted of two representatives from each Xindi race. As of early 2154, the Council representatives from each species were as follows:
- Arboreal: Jannar and an unknown assistant
- Aquatic: Kiaphet Amman'sor and an unknown assistant
- Insectoid: unknown, its name is extremely long and probably unpronouncable for humanoids, and an unknown assistant
- Primate: Degra and an unknown assistant
- Reptilian: Commander Dolim and an unknown assistant
The Council chamber was located in a fortress on a planet colonized by the Avians in the 19th Century BCE. (ENT: "The Council")