Disclosure: I work at AIsa, and AIsa is our product. Everything about Muse below comes from my own use, including the screenshots.
Rio estimated the call would cost about three cents. The quote came back at thirteen. So it stopped and asked me.
That was the moment I decided to write this. Not because Meta's Muse hit No. 1 on the US App Store within 10 days of launch, though it did. Because for the first time, I'd watched a consumer AI app go use a paid API on my behalf, and handle the money more carefully than I expected.
If you build agents, or build things agents will call, the interesting part is how that handoff worked. Muse lets you connect outside services. I signed in to AIsa once through OAuth, then asked Rio, the assistant, to find keywords a competitor ranks for that we haven't covered yet. That's a real SEO job, and it runs on paid data.
Three things happened that I didn't expect.
It got a quote before running anything. The content-gap analysis came back quoted at $0.132, with a cap of $0.165. Nothing ran until I'd seen that.
It stopped when the price was higher than it guessed. Rio had estimated about $0.03. When the real quote came in higher, it d and checked with me before going ahead.
The bill came in under the quote. By Rio's count, every call in the session cost well below what was quoted. One plan quoted at $0.60 ended up costing $0.09.
That's what I think an agent should look like. It can use real professional services, and the spending decisions stay with the person. Notice what made it possible on the service side: an OAuth flow the agent could complete, and a price it could read before calling.
Muse is Meta's personal AI app. It connects to your calendar, your email, and the tasks on your phone. If something isn't finished when you put the phone down, a cloud machine keeps working on it.
I used it for a few days as my actual assistant: scheduling, email, and the SEO research above. Three things stood out before I ever got to the spending part.
You never manage context. No prompt writing, no fresh chats to keep topics apart. I ran unrelated tasks in one conversation and it kept track. I never repeated background I'd already given it. Most AI products of the last two years quietly assumed you already knew how to use AI. Muse adapts to the person instead. I think kids and grandparents could pick it up without help.
Rio makes it feel like a companion, not a tool. A soft, fluffy character sounds like a small design choice. For someone trying AI for the first time, it's the thing that makes them try.
I couldn't dent the free plan. When I took this screenshot after heavy use, I'd used 2% of my weekly limit.
What separates Muse from a chatbot is that it acts across apps, and the work doesn't stop when you put your phone down. Instead of opening five apps to get one thing done, you hand it to an agent.
If you sell online, sit with that for a second. Comparing prices, placing an order, tracking a shipment. More of that will happen through an agent. Your shopper might never see your storefront, just a one-line recommendation from their assistant.
According to [this Hacker News thread](https://news.ycombinator.com/item?id=49789982), Amazon has blocked Muse.
I think the logic is simple. If shoppers get used to buying through someone else's agent, a marketplace stops being a place people visit and becomes a backend that agents query. Traffic, customer data, and ad inventory are all up for grabs at that point. Amazon's caution makes sense to me.
It also raises a question for everyone smaller than Amazon: is your business ready to be understood and used by an AI agent?
Since I work there, keep your skepticism on. But the experience above is the clearest demo of what AIsa is for: a resource layer that agents can use. One OAuth sign-in connects it. Every call is quoted up front with a spending cap, and you pay per call. And the tools are the professional kind: SEO content-gap analysis, go-to-market research, social lookups, financial data. If you're building an agent, start at aisa.one/api.
Have you handed a real task to an AI yet, with money on the line? Not a chat. A task. I'd like to hear how it went, and what it was allowed to spend. Comments are open.