Can I upload a closed source artifact?

Questions

What if you want to upload an artifact but the source code of that artifact or project is not public or under an open source license. Can I upload it without publishing the source code?

Answer

Yes! You can upload artifacts under closed source to the Central Repository. For details please read our Terms of Service for Publishers.

Just keep in mind that uploading a jar of the sources to pass the requirements is still needed, but you can add any dummy source JAR file (Eg. a JAR with README content) to pass that requirement step when publishing your artifact.