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

Q: How do I use Unpaywall (Open Access Papers) with Claude Code?

You connect the MCP Server using claude mcp add and then call it directly from your shell script. It's designed to be non-interactive, making it perfect for cron jobs or GitHub Actions.

Run automated DOI Open Access status checks from your terminal script with Claude Code and the MCP Server.

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Connect Unpaywall (Open Access Papers) MCP to Claude Code

Create your Vinkius account to connect Unpaywall (Open Access Papers) to Claude Code 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 Code

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Automate OA Status Checks in CI/CD

You can pipe a list of DOIs into a shell script that uses this MCP Server to check their open access status. This is perfect for pipelines where you need pre-commit validation on source material availability.

Headless DOI Metadata Retrieval

Because Claude Code runs without a GUI, it's ideal for background tasks. Use the MCP Server to fetch OA status and full-text PDF links from DOIs in an SSH session or Docker container. It’s non-interactive power.

MCP Server for Scripted Data Validation

Run a simple command that calls `get_article_oa_status` with your target DOI list. The output is standard output, ready to be captured by other scripts or logs. This makes it incredibly reliable for automation.

Setup guide

Set up Unpaywall (Open Access Papers) MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see unpaywall-open-access-papers-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Unpaywall (Open Access Papers) transactions." It will automatically discover and invoke the available Unpaywall (Open Access Papers) tools.

Terminal

claude mcp add --transport http unpaywall-open-access-papers-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

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Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the Unpaywall (Open Access Papers) MCP

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

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

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

Get your connection token →

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

You connect the MCP Server using `claude mcp add` and then call it directly from your shell script. It's designed to be non-interactive, making it perfect for cron jobs or GitHub Actions.

Yes, you write a simple loop that feeds multiple DOIs into the tool. The MCP Server handles the sequence and outputs all results to stdio, which your script can then process.

It returns machine-readable status information for a given DOI. This means you get clean JSON back into the terminal, which your script can easily parse with `jq` or similar tools.

It’s perfect. If your deployment process requires verifying that source documentation is openly accessible, running the status check via an MCP Server in a CI/CD pipeline adds necessary validation.

The server touches DOI identifiers and open access metadata. Since it's running headless, it only reads this status data; no write permissions are required or utilized.

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