Monastic foundation and ascetic life
The monastery James founded took its name, Zheleznoborov, from the iron-bearing soil of the place where he settled. The synaxarion records that he maintained a strict communal discipline after the pattern of his teacher's monastery, and that his own labors included digging ponds and giving relief to displaced and impoverished people who came to the community. The accounts describe his personal asceticism as including the wearing of a hair shirt and chains.
By tradition his reputation for holiness was established during his own lifetime. The synaxarion relates that in 1415, when Sophia, the wife of Great Prince Basil (reigned 1389–1425), fell gravely ill before childbirth, the prince sent to James asking his prayers and whether she would survive; the tradition connects the saint with the safe birth of the prince's son, the future Basil the Dark. A later visit, dated to 1450, is recorded in which that son came to thank the saint.