[zxzax]

If you are committing crimes in China, the police (i.e. the Chinese government) will find you and stop you. I don't know why this is a point of contention. That is a fact.

If the API was protected in any way, the usage can fall under anti-circumvention. That's how the DMCA works. This is also a fact.

We can dispute what actually happened, and we can dispute invididual laws in China (or in EU, or the US), but your assertions seem to be suggesting that it's wrong that these things happen at all, which is not true.

[ratww]

Making a program is not illegal, as long as it's not circumventing anything. If it were, SEND A DMCA. FOLLOW THE LAW.

The API was public, authenticated, documented and intended for third party developers. Even if it was reverse engineered there is still legal grounds for that, as seen by the YouTube-dl situation.

If there was any law-breaking, it would be the people downloading scores and MuseGroup for distributing them.

Repeating what I said below:

Even if musescore-downloader was doing illegal things (and I would argue it wasn't, since there was no circumvention of anything), the law should be followed by both sides, no excuses. That means sending a DMCA instead of a threat.

[zxzax]

This may have been an accident where the legal notice was sent out before taking the API offline. If that's the case I agree they messed up. The DMCA may not apply here.