@bayesfactor We haven’t fully ported the option to submit structures for calculation to our new website yet due to its limited use by the community. We’re looking into bringing it back but have no time estimates for it. In the meantime, please use MPRester.find_structure() to check if your structure already exists in MP and also check out the discussion in this thread: Uploading data to MPContribs - #12 by Davit_Gochitashvili HTH