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The X-ray transient eclipsing source MXB 1659-298 went in outburst in 1999and 2015, respectively, during which it was observed by XMM-Newton, NuSTAR andSwift. Using these observations we studied the broadband spectrum of the sourceto constrain the continuum components and to verify the presence of areflection component. We analysed the soft and hard state of the source,finding that the soft state can be modelled with a thermal component associatedwith the inner accretion disc plus a Comptonised component. A smearedreflection component and the presence of an ionised absorber are also requestedin the best-fit model. On the other hand, the direct continuum emission in thehard state can be described by a Comptonised component with a temperaturelarger than 150 keV. Also in this case a reflection component and a ionisedabsorber are observed.

Broadband spectral analysis of MXB 1659-298 in its soft and hard state