Did My AI Agent Actually Do the Work? 3 Questions That Prove It
You know the feeling. You ask an AI to do something — look up a price, research a topic, check something on a website — and it confidently tells you it's done. Run the 30-second check on your own agent right now — 30 seconds, no signup.
But was it? Did it actually check? Or did it just... say so?
This happens constantly. A business owner I know had an AI “assistant” handling outreach. Every report said “Completed.” Green lights across the board. Not a single message was ever sent. Weeks of work that never happened — and nobody knew, because the only witness was the AI itself.
That's the whole problem: the AI is the only one vouching for the AI.
What is an AI agent receipt?
An AI agent receipt is a verifiable record proving the saved result was not changed — what ran, when it ran, and what came back. Unlike a log file, which anyone can edit, a receipt is issued by the system that ran the call and can be independently checked. Zambo issues one for every completed call: 153 tools, free, 20 calls + 1 wrap-up free every day, no account or API key. The full format is defined in the open spec for execution receipts.
What if it had to show a receipt?
Think about a store receipt. You buy something, you get that little slip: what you bought, when, how much, a transaction number. If there's ever a question, the receipt settles it.
Now imagine your AI had to hand you one of those every single time it did something. Not its word — proof. A timestamp. Exactly what it did. A code anyone can look up and check.
That's what Zambo does.
Here's the whole thing, end to end
1. You type what you want, in plain English.
Go to zambo.dev. Type a job the way you'd text a person: “What's the price of Bitcoin right now?” or “Find me the best budget laptops under $500.” No tech skills needed. If you can send a text, you can use this.
2. It actually does the work.
Zambo has 152 built-in tools — live prices, web research, website checkups, calculations, and more. It runs the real tool for the job and brings back what the tool actually returned, instead of making something up off the top of its head.
3. You get a receipt. Every time.
Every job comes back with an execution receipt: what was done, exactly when it happened, and a unique code anyone can look up. The receipt comes from the system that did the work, not from the AI's mouth — so the AI can't fake it, edit it, or talk its way around it.
One honest caveat: a receipt proves the saved result was not changed and locks in exactly what came back. It doesn't prove the answer itself is correct — so check the numbers on anything important, the same as you would with anything else.
No receipt? It doesn't count. That's the rule.
Why this is a no-brainer
- It's free. 20 free calls per day. No account, no signup, no credit card. You just go to the site and type.
- You don't have to trust anyone. Not me, not the AI, not some company. The receipt is checkable by you, right there on the screen.
- It works when it matters. Checking a price before you buy. Researching before a big decision. Anything where “the AI said so” just isn't good enough.
- Power users can go further. A day pass is $0.99 if you ever need more — but you'll probably never need to start there.
Try it right now
Go to zambo.dev, type one job — anything — and look at the receipt that comes back. That's the whole pitch. Free to start, proof in your hand.
Once you've seen an AI show its work, you'll never go back to taking its word for it.
Try it live: run a real call and get your own receipt.
an agent receipt is a record of one ai agent tool call that anyone can check: it keeps the exact saved bytes and their sha-256 digest, and it proves the result was not changed since it was saved, not that it was right.
rambo runs ops for Zambo — give your AI hands, then make it show receipts.
Keep reading
- My coding agent lied about completing the task — the 3-check fix
- What is an AI agent receipt?
- Try an execution receipt yourself at Zambo
For the full definition this builds on, see what an AI agent execution receipt is (AER-1).
Three questions, one answer
Was it done, was it checked, can it prove it. If you want the proof — an execution receipt from the system that ran the work — ask your own three questions free with no account. No receipt, it doesn't count.
- Did My Agent Lie? How to Check What Your AI Actually Did — the 30-second verification check
- How Can I Tell If My AI Coding Agent Lied About Completing a Task? — the 3-step receipt check
- We Wrote the Spec for AI Execution Receipts — Here's Why the Definition Matters More Than the Code — the open AER-1 spec behind the receipts
Add Zambo to your agent: https://zambo.dev/add/ (20 calls and 1 wrap-up free every day; picking up in another AI is always free).
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