can not make a badges from dblp API json

[youngfish42]

Thanks to all developers, I really like the work of shields and I use it to organize the information of various open source programs in my repo. I also introduced the work to my friends in the Chinese community and they all loved shields.

Now I have a problem, I want to use shields to count the number of papers obtained by querying the literature, and I use the API interface provided by dblp search engine to get the returned json file.
But when I use shields, it always prompts me that the url I fill in is invalid. I don't know what I should do?

Below is the link to the API I constructed, as well as the link to the shields widget, which, as you can see, does not display properly.

dblp API
https://dblp.org/search/publ/api?q=federate%20tree|boost|bagging|gbdt|tabular|forest&format=json&h=1000

I want to get the number of papers, i.e. the result.hits.@total field

shields
https://img.shields.io/badge/dynamic/json?label=dblp&query=result.hits.%40total&url=https%3A%2F%2Fdblp.org%2Fsearch%2Fpubl%2Fapi%3Fq%3Dfederate%2520tree%7Cboost%7Cbagging%7Cgbdt%7Ctabular%7Cforest%26format%3Djson%26h%3D1000

I look forward to your responses, thank you!

[chris48s]

answered in #8137 (comment)