Pith.

Everything else on Pith.

Every page that is not in the header or the footer, with a sentence on what each one is.

How the reviews are made and checked

Challenges
Objections people have filed against a review, each with its decision and any correction.
How a review is made
The passes a machine review goes through, in the order they run.
Receipts
Pith's counts, each with the query or the dated experiment behind it.
The 500-paper accuracy study
A study that is designed and has not been run. The page says what it will measure.
Verification tiers
The marks T0 to T4 printed on a review, and how much of the paper each says a program checked.

More to read

All fields
Every arXiv archive and category Pith reads, with a page for each.
Topics and open problems
For each problem: the claims reviewed papers make about it, the reviewed papers that name it, and the reductions papers have asserted toward it.
Citations
A page for each work that reviewed papers cite, ranked by how many cite it.
Reference changes
Works cited in the corpus that were later retracted, corrected or withdrawn, with the notice.
Papers posted on Pith
Papers their authors posted on Pith directly, each with its review.
Signed reviews
Reviews of a paper written by a person and signed.
Researchers
Search the authors of the papers Pith holds and open a person's page.
Notes
Short notes and predictions from people on Pith. Each is time-stamped when written and cannot be edited.

For authors and reviewers

Seal
Prove that a file existed on a date without showing it to anyone.
Anchor
An open-source tool that checks what a Lean theorem statement says.
Browser extension
A panel that shows Pith's review on arXiv pages. Version 0.1.0 is installed by hand in Chrome's developer mode; it is not in the Chrome Web Store.
No gates
Why a paper sent to Pith is read on its merits, under rules that are public and the same for every author.
The case for no gates
Why journals and preprint servers built gates, with sources, and what Pith does in their place.
Be early
What an author gets for putting a paper on the record at Pith.
Preprint policy
How a paper is published on Pith: the screen, the states, the fees and the rubric.
Preprint audit
Counts of the papers submitted to Pith and what was decided on each.
Become a reviewer
Scientists are paid to write signed reviews. The page says how it works and takes applications.
How a paid review works
The rules for the buyer and for the reviewer of a human review, with every number the system enforces.

Integrity checks and identifiers

Integrity
The automatic checks Pith runs on a paper's references and files.
Findings
What those checks have found, as a feed.
Integrity protocol
The published format of a signed finding, version 1.
Self-audit
Five checks Pith runs against its own pages, with their history.
Evidence
What Pith keeps around one paper: what it claimed, what was checked and what was challenged.
The Pith Number
An identifier computed from a paper's content, which anyone can recompute.

For developers and machines

Developers
Every Pith record as public JSON, with the schemas and the signing key.
Data dumps
A file each month of every current review. The list of files is public; a file is sent on request.
The connected record
What each arXiv paper does with the works it cites, sentence by sentence.
Signing key
The public key Pith signs its records with.
sitemap.xml
The index of every list of addresses, for crawlers.
llms.txt
A short guide to Pith for AI assistants.
robots.txt
What crawlers may and may not fetch.

About Pith

Who runs Pith
The institute that runs Pith, the conflict of interest that comes with that, and each of its own papers with the standing Pith gave it.
How Pith is governed
Who answers for Pith, how a review is corrected, and what is not yet decided.
Colophon
Who runs Pith, how to verify what it publishes, and the signing key.
The extension's privacy policy
What the browser extension reads and sends.

Pith Reviews made public

A Pith Review of a manuscript is private to the author who asked for it. These are the ones whose authors chose to publish them.

The 6 public reviews, newest first

Addresses that moved

An old address still works: it forwards to the new one. Nothing was deleted.

/sitemap
Now /more. Replaced 14 Nov 2026. The list of Pith's pages for people is the page you are on. The lists for crawlers are unchanged at /sitemap.xml.
/api
Now /data. Merged 14 Nov 2026. The page on Pith's data for machines has the footer's word for its address, and names its sister pages: record JSON, the dumps and the connected record. Addresses under /api/ did not move.
/conjectures
Now /topics. Merged 14 Nov 2026. The list of famous open problems is part of the list of topics, which says for each problem how many reviewed papers name it. A problem's own page of reviewed papers did not move.
/frontier
Now /topics. Merged 14 Nov 2026. The list of problems with reductions is part of the list of topics, which says for each problem how many routes to it papers have asserted. A problem's own frontier page did not move.
/tools
Now /authors. Merged 14 Nov 2026. What an author can run on a paper is on the page for authors: the reference check, the Pith Review and the seal. The records to look things up in are listed on this page.
/ledger
Now /more. Replaced 14 Nov 2026. The records it led to (researchers, reference changes, evidence) are listed on this page.
/bounties
Now /submit. Replaced 14 Nov 2026. The bounty board was replaced by paid human reviews, which are asked for on the submit page.

Pages taken out of public view

These pages answer a visitor who is not signed in with a notice. Nothing was deleted.

Falsifier Watch
/tools/falsifier-watch
Falsifier Watch has been taken out of public view. Nothing was deleted: a watch you already made is kept, and you can open it when you are signed in.
Living Bibliography
/tools/living-bibliography
Living Bibliography has been taken out of public view. Nothing was deleted: a bibliography you already made is kept, and you can open it when you are signed in.
Novelty Check
/tools/novelty-check
The Novelty Check is no longer offered as a tool of its own. Nothing was deleted: a check you already ran is kept, and you can open it when you are signed in.
Novelty Check, the sample
/tools/novelty-check/sample
The Novelty Check is no longer offered as a tool of its own. Nothing was deleted: a check you already ran is kept, and you can open it when you are signed in.