Is there documents about backend api of mxnet?

i am planing to implement some operator in backend and find so few resources online.

for example, by heavliy digging, i find MXNDArrayGetData() is a method to get pointer of NDArray, which is really key if you want do sth with c/c++ under mxnet

then is there any page about api of mxnet backend? are the source codes the only way?

You can find some resources on the MXNet Confluence Wiki. One example can be found here.

And there’s some information about the backend on the website under the Architecture section.

Another option is to post on the mailing list to get eyes from the core developers.