Store one memory (semantically indexed) in your wallet's private namespace. $0.001 via x402. Free without paying: sign 'borismem-free:<wallet>:<ts>' (EIP-191) and call /free/memory/write or /free/memory/search -- 1000 writes + 500 searches per rolling 30 days, no payment, no account.
https://mem.borisinc.com/paid/memory/write