Keystone MCP Server: Install & Setup

Install Keystone in Claude Code

Claude Code

claude mcp add --transport http keystone https://keystone-research.vercel.app/api/mcp

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

{
  "mcpServers": {
    "keystone": {
      "url": "https://keystone-research.vercel.app/api/mcp"
    }
  }
}

Frequently asked questions

What does the Keystone MCP server do?

What an arXiv paper builds on, disputes and assumes, read verbatim from its LaTeX. No LLM.

Is the Keystone MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Keystone run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add Keystone to Claude Code?

Run: claude mcp add --transport http keystone https://keystone-research.vercel.app/api/mcp

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