While decreases in risky injecting behaviours are an outcome of DCR use, HCV prevention and treatment in these settings haven’t been adequately described. There are no international DCR standards for HCV practice and surveys are yet to address HCV prevention, treatment or sero-prevalence status of DCR clients. This online survey provides a ‘snapshot’ of DCR clients’ HCV status; approaches to HCV in DCRs, and what DCRs need to expand these services.