This paper presents the following AB-Caputo fractional boundary value problem [Formula: see text] with integral-type boundary conditions [Formula: see text] of order [Formula: see text]. Schauder and Krasnoselskii’s fixed point theorems are used to find existence results. Uniqueness is obtained via the Banach contraction principle. To investigate the stability of a given problem, Hyers–Ulam stability is discussed. An example is provided to validate our results.