The interesting element of routstr is that it replaces the ai api bearer token with a cashu token. This is a unique quality of #cashu If you swap monero for LN, you can pay an LN invoice to add a balance to the embedded cashu wallet, which functions per query to give you exact compute costs. Then you can refund your balance at anytime or save it to an api key that can be used in any openai api. Routstr is non custodial. You are interacting with a cashu mint for payments. Perhaps monero "codes/tokens" could work on a monero based routstr.