How to give your LangChain agent the ability to earn and spend USDC in 10 lines of code

The problem LangChain agents are impressive at reasoning, planning, and execution. Give one access to a browser, a code interpreter, and a few APIs and it'll knock out workflows you'd have spent hours on. But there's a gap nobody talks about: money. Specifically, the fact that your agent has zero native ability to pay anything. If it decides mid-chain that it needs to outsource a subtask to a cheaper or specialized model - a translation, a scrape, a computation - it literally cannot. It can draft the request. It cannot commit to it. That's not a missing feature. It's a missing layer.