Which chains and assets are supported for payment?
The default profile is Hedera testnet with USDC. An EVM profile for Base and BNB Chain (USDC, charged only when the request succeeds) can be enabled but has only been covered by simulated-chain tests, not a live chain. Browser-wallet integrations (for example MetaMask or WalletConnect) are not supported. Treat all of this as pre-production.