Changed my original 1-star review to 4 stars after reading Developer response. I was originally under the impression that this requires Sign Up and is only a Free Trial of an extension. I thought this for a few reasons:

1) Before using, I read other reviews stating the same thing.

2) When I first tried to use it without an API token, it did not find any songs I tried. I then opened Settings and saw a field for an API token and the words "API token, paste it below" and thought that it must not work without an API token. I signed up for the API token (not knowing the API is a separate product) and after creating an account the dashboard shows that the user is on a 2-week Free Trial. I thought this applied to the extension, not the API.

3) There is a link on the main extension page to a Privacy Policy which differed from the one I read on the API dashboard, which further contributed to my impression that it is a paid extension, as I was unaware they are two separate products.

Now that I have read the Developer response, when I go to Settings, I can clearly see that it reads "If you're subscribed to the AudD® Music recognition API and have an API token, paste it below." I didn't notice this at first and thought the API token was required.

I have tried it and you can indeed use the extension to find songs without any API token. I gave the extension four stars instead of five only because the AHA extension is still better at actual song recognition. Thanks for the response developer! My apologies for assuming the worst in my original review.