Compatible with every major AI agent and IDE
What is the Unpaywall (Open Access Papers) MCP Server?
Connect to the Unpaywall database to instantly find legal, open-access versions of scholarly papers. This server allows your AI agent to bypass paywalls by locating freely available PDFs and repository versions of research articles using their Digital Object Identifier (DOI).
What you can do
- OA Status Verification — Instantly check if a specific scholarly article is available for free under an Open Access license.
- PDF Retrieval — Get direct links to legal, full-text PDF versions of research papers hosted on publisher sites or institutional repositories.
- Metadata Inspection — Retrieve information about the type of Open Access (gold, green, bronze, etc.) and the hosting source.
- Research Automation — Streamline literature reviews by letting your agent automatically find accessible versions of cited works.
How it works
- Subscribe to this server
- Enter your email address (required by Unpaywall's API policy)
- Start searching for open-access papers in Claude, Cursor, or any MCP-compatible client
Who is this for?
- Researchers & Academics — quickly find full-text versions of papers without navigating multiple library portals
- Students — access required reading materials that are legally available for free
- Data Scientists — automate the collection of open-access research data and papers for analysis
Built-in capabilities (1)
Retrieve Open Access status and locations for a specific DOI
Why Windsurf?
Windsurf's Cascade agent chains multiple Unpaywall (Open Access Papers) tool calls autonomously. query data, analyze results, and generate code in a single agentic session. Paste Vinkius Edge URL, reload, and all 1 tools are immediately available. Real-time tool feedback appears inline, so you see API responses directly in your editor.
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Windsurf's Cascade agent autonomously chains multiple tool calls in sequence, solving complex multi-step tasks without manual intervention
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Purpose-built for agentic workflows. Cascade understands context across your entire codebase and integrates MCP tools natively
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JSON-based configuration means zero code changes: paste a URL, reload, and all 1 tools are immediately available
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Real-time tool feedback is displayed inline, so you see API responses directly in your editor without switching contexts
Unpaywall (Open Access Papers) in Windsurf
Unpaywall (Open Access Papers) and 4,000+ other MCP servers. One platform. One governance layer.
Teams that connect Unpaywall (Open Access Papers) to Windsurf through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 4,000+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for Unpaywall (Open Access Papers) in Windsurf
The Unpaywall (Open Access Papers) MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 1 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Windsurf only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
Unpaywall (Open Access Papers) for Windsurf
Every tool call from Windsurf to the Unpaywall (Open Access Papers) MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
How do I check if a specific research paper is available for free?
Use the get_article_oa_status tool with the paper's DOI. Your agent will query the Unpaywall database and return the Open Access status along with direct links to the PDF if available.
Does this tool provide legal versions of the papers?
Yes. Unpaywall only indexes legal, author-archived, or publisher-provided Open Access versions of scholarly articles. It does not access pirated content.
What information is required to use this server?
You need the DOI (Digital Object Identifier) of the article and a valid email address to authenticate with the Unpaywall API.
How does Windsurf discover MCP tools?
Windsurf reads the mcp_config.json file on startup and connects to each configured server via Streamable HTTP. Tools are listed in the MCP panel and available to Cascade automatically.
Can Cascade chain multiple MCP tool calls?
Yes. Cascade is an agentic system. it can plan and execute multi-step workflows, calling several tools in sequence to accomplish complex tasks without manual prompting between steps.
Does Windsurf support multiple MCP servers?
Yes. Add as many servers as needed in mcp_config.json. Each server's tools appear in the MCP panel and Cascade can use tools from different servers in a single flow.
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