Thanks for reaching out. As for #2, that was an issue with the underlying data release. We’ve just released a new version and updated the mp-api library. Also see here. Please upgrade to mp-api==0.44.0. As for #1, the client will directly download all documents from our OpenData repositories when no query is provided. The fields argument will be ignored in this case and a warning is printed in the latest mp-api version. Please save the results for a full download to a file, and re-use it to extract what you need. See #4 here. HTH