Opencitations MCP Server: Install & Setup

Install Opencitations in Claude Code

Remote URL

Claude Code

claude mcp add --transport http opencitations https://gateway.pipeworx.io/opencitations/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "opencitations": {
      "url": "https://gateway.pipeworx.io/opencitations/mcp"
    }
  }
}

npm

Claude Code

claude mcp add opencitations -- npx -y @pipeworx/mcp-opencitations

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "opencitations": {
      "command": "npx",
      "args": [
        "-y",
        "@pipeworx/mcp-opencitations"
      ]
    }
  }
}

Frequently asked questions

What does the Opencitations MCP server do?

OpenCitations MCP — citation index (COCI + general Index API).

Is the Opencitations MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Opencitations run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Opencitations to Claude Code?

Run: claude mcp add --transport http opencitations https://gateway.pipeworx.io/opencitations/mcp

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