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mcp/harbor
Grok

unpaywall for Grok

io.github.smaboundless/unpaywall

Open-access availability for 120M+ scholarly articles via the Unpaywall API

client:Grok transport:stdio runtime:pypi

Install unpaywall in Grok

.mcp.json (in your project root)

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{
  "mcpServers": {
    "unpaywall": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "unpaywall-mcp-server"
      ],
      "env": {
        "UNPAYWALL_EMAIL": "<UNPAYWALL_EMAIL>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

unpaywall in other clients

unpaywall MCP server