OBJECTIVE: Rates of problematic cannabis use among young adults are high and increasing. Craving for cannabis varies throughout the day and is an important risk factor for cannabis use, yet no studies to date have tested interventions offered at the moment craving is experienced in the natural environment. METHOD: This study used an efficient and innovative microrandomized trial design to test two distinct types of coping messages (mindfulness strategy vs. distraction strategy) offering brief coping strategies when moderate to severe craving was reported via ecological momentary assessment (EMA). RESULTS: Young adults who regularly use cannabis ( CONCLUSIONS: Despite this outcome, this method of testing digital interventions targeting momentary risks for substance use such as craving holds promise for rapidly and efficiently screening a wide variety of intervention strategies for inclusion in future just-in-time adaptive interventions. (PsycInfo Database Record (c) 2025 APA, all rights reserved).