Keryx MCP Server: Install & Setup

Install Keryx in Claude Code

Remote URL

Claude Code

claude mcp add --transport http keryx https://keryx.cc/mcp

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

{
  "mcpServers": {
    "keryx": {
      "url": "https://keryx.cc/mcp"
    }
  }
}

npm

Claude Code

claude mcp add keryx -- npx -y keryx-mcp

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

{
  "mcpServers": {
    "keryx": {
      "command": "npx",
      "args": [
        "-y",
        "keryx-mcp"
      ]
    }
  }
}

Frequently asked questions

What does the Keryx MCP server do?

Budgeted research with cited evidence and visible payment state on the selected Arc network.

Is the Keryx 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 Keryx run locally or remotely?

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

How do I add Keryx to Claude Code?

Run: claude mcp add --transport http keryx https://keryx.cc/mcp

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