He traveled much, visiting Arles, Tarascon, Aragon, Catalonia, Majorca (where he must have foregathered with Judah Leon ben Moses Mosconi), and Egypt, where, as he says in his Tzava'ah (ethical will), he hoped to be instructed by the members of Maimonides' family.
At one time Caspi intended to go to Fez, where many renowned schools existed; but he seems to have abandoned this project and to have settled at Tarascon.
Caspi was one of the most prolific writers of his time, being the author of 29 works, the greater part of which are still extant in manuscript and the titles of the remainder being known from the list which he had the precaution to make.
The following is a list of his writings in their chronological order, some of them being no longer in existence: Joseph Caspi's name is also to be found attached to many liturgic poems of merit.
On the other hand, Isaac Abrabanel and Simon Duran emphatically declare him to be antireligious because, among other things, in his commentary on the Moreh he admitted the eternity of the universe (i.