> ## Documentation Index
> Fetch the complete documentation index at: https://docs.paperzilla.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Which paper sources does Paperzilla cover?

> Paperzilla monitors major preprint sources and new PubMed-indexed biomedical and clinical literature.

export const AiAgents = ({path}) => <Tip>
    <b>AI agents</b>: This page is available as <a href={path + '.md'}>markdown</a>. See also the <a href="/llms.txt">docs index</a> and <a href="/llms-full.txt">full docs</a>.
  </Tip>;

<AiAgents path="/answers/sources-covered" />

Paperzilla monitors preprints and indexed research literature from:

* arXiv
* medRxiv
* bioRxiv
* ChemRxiv
* ChinaXiv
* PubMed

Source badges appear on paper cards so you can see origin at a glance.

PubMed is included in Starter, Plus, and Pro. It covers new PubMed-indexed biomedical and clinical literature after you add PubMed categories to a project. Paperzilla does not mirror the full PubMed archive.

PubMed records can be available before an abstract or full text is public. Paperzilla always links to the PubMed record. A PDF action appears only when an open-access PDF URL is available.