# Services from papers.use.x402atlas.com on Zero

> papers.use.x402atlas.com serves 2 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/papers.use.x402atlas.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/papers.use.x402atlas.com/health.json

## Services

- [Academic Paper Lookup](https://www.zero.xyz/c/academic-paper-lookup-f717327f/llms.txt): $0.005/call via x402. Retrieves full metadata for a scientific paper by DOI, arXiv ID, or PubMed ID, including abstract, TLDR, citations, BibTeX/APA, retraction flag, and open-access PDF link, merged from five scholarly databases.
- [Academic Paper Search](https://www.zero.xyz/c/academic-paper-search-53862c1b/llms.txt): $0.01/call via x402. Searches scientific and academic literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in a single deduplicated, retraction-aware call, returning ranked results with citation metrics and open-access PDF links.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)