Kubo RPC is not here.

The /api/v0 Kubo RPC (https://docs.ipfs.tech/reference/kubo/rpc/) 
is not part of IPFS Gateway Specs (https://specs.ipfs.tech/http-gateways/). 
Consider refactoring your app to use different URL.

If you still need this Kubo endpoint, please self-host a Kubo instance yourself: 
https://docs.ipfs.tech/install/command-line/ with proper auth 
https://github.com/ipfs/kubo/blob/master/docs/config.md#apiauthorizations

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