if you have xenfts on ethpow you can claim directly from the contract https://www.oklink.com/ethw/address/0x94d9e02d115646dfc407abde75fa45256d66e043/contract if you have normal xen mints or cointools you have to find the right contract and then you can also claim xen directly fromn the contract.
for xenft claim you would use the last method on the above link 14. bulkClaimMintReward you enter tokenId (you have it on xen.network) and the address wich started the claimrank.
I checked the xen address
https://www.oklink.com/ethw/address/0x06450dee7fd2fb8e39061434babcfc05599a6fb8
for how to claimmint if you started the claim from your wallet, but I don't see contract code deployed so It might be tricky, you could make a script in python and send 0x52c7f8dc as input data to the contract and in theory claimMintReward should work, but don't take my word for it
Although, come to think of it, if your rpc is down, i think you still need to connect your wallet to the metamask when you claim directly from the contract, so I am not sure above will work since you still have to set gwei in your metamask wallet and if you say your rpc is down, you won't be able to send the data to the contrtact. Python will work, sinc you'll youse a different rpc provider i guess