The OpenBSD rpki-client is a free, easy-to-use implementation of the Resource Public Key Infrastructure for Relying Parties to facilitate validation of the Route Origin of a BGP announcement. The program queries the RPKI repository system, downloads and validates Route Origin Authorisations and finally outputs Validated ROA Payloads in the configuration format of OpenBGPD, BIRD, and also as CSV or JSON objects for consumption by other routing stacks.