all. Currently sidecar owns a api "/node/version" for get polkadot node version. But is there any api could return sidecar api version for us?
How are you running sidecar? If you have it installed in your project you can query the version using the CLI:
If you have installed it globally:
And if you are query through the docs page: https://paritytech.github.io/substrate-api-sidecar/dist/