 The study aimed to investigate the feasibility, acceptability, engagement, and effectiveness of a cognitive behavioral therapy, CBT, based chatbot, Otis, as an early health anxiety management intervention for adults in New Zealand during the COVID-19 pandemic. The results showed that although there was no significant decrease in health anxiety at post-intervention or follow-up, participants perceived benefiting from the intervention and reported significant improvement in general anxiety, personal well-being, and quality of life. Anthropomorphism, Otis' appearance and delivery of content facilitated the use of Otis, while technical difficulties and high performance and effort expectancy were barriers to acceptance and engagement. Overall, the study suggests that chatbots may be a feasible and acceptable means of delivering CBT to improve anxiety management, quality of life, and personal well-being but might not significantly reduce health anxiety. This article was authored by Yanushka Gunsekara and Leesh Duncan.