dwave-system is a basic API for easily incorporating the D-Wave system as a sampler in the D-Wave Ocean software stack. It includes DWaveSampler, a dimod sampler that accepts and passes system parameters such as system identification and authentication down the stack. It also includes several useful composites—layers of pre- and post-processing—that can be used with DWaveSampler to handle minor-embedding, optimize chain strength, etc.