We describe a science mission concept for SEEJ, asmallsatwhich will monitor X-ray bright exoplanet hosts during exoplanet transit using miniature focusing X-ray optics (MIXO) telescopes. The depth and duration of the of the flux change will allow us to characterize the exopspheres of multiple hot Jupiters in a single year. In addition, the long baselines of the out of transit data will allow us to characterize the temperature, flux and flare rates of the exoplanet hosts at an unprecedented level.
