Unpaywall MCP Server
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- AlicenseNot gradedqualityCmaintenanceProvides free, no-key open-access lookup for scholarly papers via Unpaywall. Enables querying article metadata and open-access status through natural language.5MIT
- AlicenseAqualityCmaintenanceEnables querying open-access availability of scholarly articles via Unpaywall API, including DOI lookup, title search, and citation export.4MIT
- AlicenseAqualityDmaintenanceEnables academic research through the OpenAlex API, allowing users to search for papers, authors, and institutions, retrieve citations, and fetch full-text content when available. Perfect for building intelligent research assistants that can explore academic literature and related works.87MIT
- FlicenseAqualityCmaintenanceEnables looking up free-to-read versions of scholarly papers by DOI and searching article titles for Open Access matches via the Unpaywall API.21-
- AlicenseAqualityCmaintenanceEnables searching scholarly literature across CrossRef, ERIC, Semantic Scholar, and OpenAlex, and retrieving open-access PDFs via Unpaywall.9MIT
- AlicenseCqualityFmaintenanceEnables real-time search and retrieval of academic paper information from multiple sources, providing access to paper metadata, abstracts, and full-text content when available, with structured data responses for integration with AI models that support tool/function calling.3117AGPL 3.0
TDQS
Scored across 4 tools
Each tool has a clearly distinct purpose: fetching PDF text, retrieving metadata, getting fulltext links, and searching titles. There is no overlap in functionality, making it easy for an agent to select the right tool for a specific task.
All tools follow a consistent 'unpaywall_verb_noun' pattern, such as unpaywall_fetch_pdf_text and unpaywall_search_titles. This uniformity enhances readability and predictability across the toolset.
With 4 tools, the server is well-scoped for handling Unpaywall-related operations, covering key actions like metadata retrieval, text extraction, link fetching, and title search without being overly sparse or bloated.
The toolset covers essential CRUD-like operations for accessing open-access content, including fetching, searching, and retrieving links. A minor gap might be the lack of update or delete tools, but this is reasonable given the server's read-only nature for external data.