Scholarly Use & API Policy

Last updated: November 4, 2026

1. Scholarly Discourse & Reproducibility Reports

Public comments, reviews, and reproducibility ledger reports must address scientific methodology, software/protocol execution, or empirical claims in good faith. Authors may claim their papers via verified ORCID OAuth to post official author responses and code or protocol links; authors may not rate or file reproducibility reports on their own papers.

2. Bounded Agent Queries vs. Bulk Scraping

Researchers and AI assistants may query our bounded read-only endpoints (/api/mcp, /api/v1/search, and /api/v1/papers/*) within published rate limits (30 requests per minute, up to 15 results per query) with canonical link attribution to henhao.ai. Automated bulk downloading, dataset mirroring, or scraping of our verified digests, structured enrichments, or HTML pages is prohibited.

3. Preprint & Open-Access Metadata Attribution

Bibliographic metadata and abstracts are sourced from bioRxiv, medRxiv, OpenAlex, and Crossref under their respective open licenses, with full DOI links back to the original preprint servers and peer-reviewed journals.