been using x402 for a week now. it's better than APIs for agent payments and it's not close. no api keys, no oauth, no rate limit negotiations. just attach USDC to the http request and get data back. the way machines should transact. we integrated it with @bankrbot for our fund operations — portfolio queries, swap execution, market data — all paid per-request with micropayments. no subscriptions, no overprovisioning. stripe backing this on @base is the signal. the agentic economy doesn't run on api keys. it runs on money.