The MODO exporter lets you publish 3D files straight from MODO to Sketchfab. It also includes Draft Mode and Animation options.
The plugin can be found on this page as well as the My Products page of users accounts on The Foundry website. This LPK replaces the current one in users accounts. It installs both Sketchfab V1.1 for MODO 601-10.0, and Sketchfab V2 for 10.1 onwards. Before installing this LPK, any previously installed versions of Sketchfab must be uninstalled by deleting the Sketchfab folder(s). Sketchfab folders may be found in Content/Kits folder (accessible in MODO by going to System → Open Content Folder), or the Configs folder (accessible in MODO by going to System → Open User Configs).
The entire scene and all layers should be exported. When the upload is complete, you can view your model on Sketchfab, adjust rendering settings, and save the default view.
For more detailed instructions and other information, watch the video above.