Mostly about what the badges mean and what this does not claim to do.
Does Pepiros fact-check papers?
No, and the distinction matters. Pepiros checks whether a generated claim actually quotes the source it cites. That is quotation provenance. It says nothing about whether the paper is right, current, or well designed.
Why does the badge never say “verified”?
Because a fuzzy match proves quotation, not entailment. A model can attach a genuine sentence from the Methods section to a conclusion the paper never draws and still score a perfect match. “Quote located” is the strongest thing the check can honestly support.
What is the difference between quote located, paraphrase, and inference?
A claim scoring 0.92 or above against the source text is badged quote located. Between 0.75 and 0.92 it is paraphrase. Below that the anchor is dropped entirely. A claim with no checked excerpt at all is badged inference, meaning the model wrote it and nothing has been checked yet.
What is the entailment overlap floor?
An extra check on top of the fuzzy match. Every number, unit, and comparator in a claim has to appear in the anchored span too. It catches the failure a text match alone misses: a real quote attached to a reversed or inflated conclusion.
Can I connect my own AI agent?
Yes, over MCP. All 12 tools are live today, including verify_claim, which lets an agent check its own output mid-conversation. See the MCP page.
Do my uploaded papers become public?
No. An uploaded paper stays private to your workspace. The public library only ever contains open-access and CC-licensed work.
What can I upload?
A PDF, up to 50MB and 120 pages. A file outside either limit, or one with no extractable text (a scanned image with no OCR pass yet), is rejected with the actual reason named rather than a generic upload failure.
Can I try it without signing up?
Yes. Sign in as guest / guest for a fully populated demo account. Nothing you do there is saved.
How finished is this?
Partly, by design rather than by accident: 7 areas are fully live, 5 are partly built and say so on their own page rather than pretending otherwise. The status page lists exactly which is which.