How to Use the Unpaywall (Open Access Papers) MCP in Claude

Quickly check Open Access status and find PDF links using your Claude Desktop environment.

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Connect Unpaywall (Open Access Papers) MCP to Claude Desktop

Create your Vinkius account to connect Unpaywall (Open Access Papers) to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Unpaywall (Open Access Papers) with Claude Desktop

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Check Open Access Status with Claude Desktop

The `get_article_oa_status` tool figures out if an article is open access and where to find the full text. You just pass it a DOI, and your agent gets back all the necessary status information. It pulls not only the OA status but also specific links for PDF versions across multiple repositories. This means you don't have to jump between ten different academic websites; Claude Desktop handles the lookup directly from the DOI.

Retrieving Full-Text Links

Need a full-text PDF? Use `get_article_oa_status` to retrieve direct links for open access versions. The tool doesn't just say 'yes'; it gives you the precise URL needed to download the article. This is critical when working with local databases or files; your agent can pull this structured data and put it right into a script or record.

Integrating Knowledge Management via MCP Server

When you run this MCP Server through Claude Desktop, the tool acts as a quick knowledge check. You feed it a DOI, and your agent runs `get_article_oa_status` to see if scholarly research is freely available. It’s perfect for PMs or developers who need live context on data availability without leaving their local development environment.

Setup guide

Set up Unpaywall (Open Access Papers) MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The Unpaywall (Open Access Papers) MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the Unpaywall (Open Access Papers) MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under unpaywall-open-access-papers-mcp.

json

{
  "mcpServers": {
    "unpaywall-open-access-papers-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Unpaywall. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Unpaywall (Open Access Papers) MCP in Claude Desktop

You add it via Settings -> Developer in the Claude Desktop app. Once installed, your agent can call `get_article_oa_status` using a DOI you provide right in the chat input.

Yes. Because the MCP Server runs locally, it's great for checking OA status against DOIs and feeding that data directly into your machine’s files or databases.

It provides structured data regarding the Open Access status, along with specific URLs for full-text PDFs. The tool returns this information so your agent can use it immediately.

Absolutely. If you're on the web version, you paste the public HTTPS URL into Settings -> Integrations.

The server handles and reports scholarly publication metadata, specifically Open Access status and DOI links for academic papers.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

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