crossref

Powerful and highly extensible command-line based document and bibliography manager.

PyPaperBot is a Python tool for downloading scientific papers using Google Scholar, Crossref, SciHub, and SciDB.

The open-source agent system that writes research papers with verified citations. Every citation checked against Crossref, OpenAlex and Semantic Scholar.

Findpapers: A tool for helping researchers who are looking for related works

Academic Paper Search：中文科研用户的 Codex / Claude Code / DeepSeek Harness Skill + MCP；跨 CrossRef、PubMed、arXiv、OpenAlex、Europe PMC 检索去重，支持 MeSH、引用核验、引文图谱、试验检索与审计导出。

I, Librarian - open-source version of a PDF managing SaaS.

Source code and data analyses for the Sci-Hub Coverage Study

⚠️ ARCHIVED ⚠️ Search across and get full text for OA & closed journals

Bibcure helps in boring tasks by keeping your bibfile up to date and normalized...also allows you to easily download all papers inside your bibtex

get the bibtex string given a doi

Command-line tool to manage bibliography (pdfs + bibtex)

This web app aims to help scientists with their literature review using metadata from OpenAlex (OA), Semantic Scholar (S2) and Crossref (CR) in local citation networks.

Batch-download reference PDFs from a DOI or paper PDF using Crossref and your institutional Edge session.

Fast relational access to openly-available publication data sets

Citation integrity as a CI gate: verify BibTeX references against Crossref & OpenAlex, catch hallucinated citations, get alerted when a cited paper is retracted.

Cross-platform BibTeX verification for researchers and AI assistants — CLI, Python API, MCP server, and explainable multi-source matching.

Zotero compatibility layer for papis

Unofficial OpenEvidence MCP server — query OpenEvidence from Claude Code, Codex, and any MCP client through your own logged-in browser tab (no API key). Fire-and-forget asks, a shared relay daemon for concurrent sessions, BibTeX + Crossref citations.

📚 Only Cite what you can verify

Download metadata for all DOIs using the Crossref API