What is PassbackAI?
PassbackAI is the review-and-passback loop for AI drafts. When your AI hands back a long answer and a handful of specific things are wrong in specific places, this is where you mark them and send them back — precisely, on the exact words. Here's the whole thing in three minutes.
Paste an AI answer, mark each thing that's wrong right where it sits, and pass the whole batch back to the model in one paste — every note anchored to the exact passage it belongs to. It works with Claude, ChatGPT, Cursor, and Gemini. It's the difference between nudging a wall of text with vague prose and answering the model precisely, like a professional. The first time it clicks, you'll want to tell someone. Try it — paste an answer.
Start with the moment it's for
You asked your AI for a quarterly summary — the Q3 business report your boss needs by Thursday. It came back fast, formatted, confident, about 1,200 words. You read it once, and it's mostly good. But five specific things are wrong, in five specific places:
- The headline revenue figure says $4.2M. It was $3.8M.
- One paragraph calls it Q2. It's Q3 everywhere else.
- There's a line claiming "churn fell to 2%" — a number the model invented; we never reported that.
- The outlook section is three paragraphs of hedged corporate fog where two clear sentences would do.
- The final recommendation contradicts the risk you flagged on page one.
You want the model to fix exactly those five and leave the other 1,150 words alone. So you start typing into the chat box: "In the revenue line, change 4.2 to 3.8…" By the third correction the report has scrolled out of view, you're paraphrasing instead of pointing, and by the fifth you're telling yourself the model will probably catch the rest. It will not. The next version comes back wrong on the two you gave up on, and you're doing another round.
That give-up moment — around correction four — is the entire problem PassbackAI exists to remove.
What PassbackAI actually is
PassbackAI is a single tool that runs in your browser. Here's what a newcomer needs to know, in five short pieces.
- The loop: paste → mark → pass back. Paste the model's answer and it renders as a real document. Highlight the revenue figure and write "was $3.8M." Highlight "Q2" and write "Q3." Do that for all five — marking the fifth is as easy as the first, because you're pointing at the text, not describing where it is. Then click Copy. Every note comes out paired to the exact passage it's about, and you paste that one block back into the chat. Five corrections, five targets, one round.
- It works with any AI. PassbackAI is cross-platform. The answer can come from ChatGPT, Claude, Cursor, or Gemini — anything that reads and writes Markdown. Claude is the deepest integration: it connects over MCP, so Claude can hand a document straight to you and read your feedback back without a copy-paste in sight.
- When to use it — and when not to. Use it when an answer is long and several separate things need changing, or when the output has passages you don't follow and you want the model to explain each one. Skip it for a single one-line fix — just type that into the chat. And it doesn't decide whether the answer is correct or safe to ship; it makes it effortless to point at what's wrong and have the model account for it.
- Where your document goes. By default, nothing you paste leaves your browser — reviewing runs entirely on your machine. A document only travels when you choose to share or route it; a private share link is encrypted in your browser before it uploads, and a document your AI routes to you over MCP is stored on our server so the model can read the responses back. Both are opt-in, never automatic.
- Two ways in. Either you paste an answer yourself, or your AI routes one to you. When Claude connects over MCP, it can send a draft directly into your collection to review — the same tool, whether you brought the document or the model did.
The part that makes it feel professional
Here's what actually changes, and it isn't the plumbing. Working with AI usually means accepting a wall of text and nudging it with more prose — "make the outlook tighter," "fix the numbers" — and hoping the model guesses which numbers, which paragraph, which tone. That's tinkering. It's fine for a throwaway. It is not how you do work you'll put your name on.
PassbackAI lets you answer the model the way you'd answer a sharp colleague: precisely, on the exact words it got wrong. Not "the revenue's off somewhere" but this figure, change it to $3.8M. Not "the outlook feels vague" but these three paragraphs, cut them to two clear sentences. You respond at the resolution the work deserves — and the model, given an unambiguous target, lands every fix on the first try.
That's the feeling underneath the loop and the anchoring and the cross-platform plumbing: your serious AI work stops feeling like coaxing and starts feeling like editing. And when a draft is important enough that another set of eyes should weigh in before it goes back to the model, you can hand it off as a single link — no account, no install — and their anchored notes ride right alongside yours. But the core of it is smaller and more personal than that: one person, one draft, answered precisely. It's the kind of better you don't keep to yourself.
The fastest way to understand it is to run it once. Paste an answer — real or the built-in sample — mark a few things, and copy the result back to your AI. If you want the deeper how-to, the full guide walks the format step by step, and the manifesto is the short argument for why the chat box loses at this.