SDK MCP Server: Install & Setup

Install SDK in Claude Code

Claude Code

claude mcp add 2s-io-sdk -e EVM_PRIVATE_KEY=... -- npx -y @2sio/mcp

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

{
  "mcpServers": {
    "2s-io-sdk": {
      "command": "npx",
      "args": [
        "-y",
        "@2sio/mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the SDK MCP server do?

Pay-per-call x402 API: geocoding, weather, earthquakes, patents, US case law, Federal Register, scientific papers, DNS/WHOIS, OFAC screening and Census data.

Is the SDK MCP server free?

Probably not entirely. The listing mentions pay-per-call, credits or a subscription. Check the provider for current pricing.

Does SDK run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add SDK to Claude Code?

Run: claude mcp add 2s-io-sdk -e EVM_PRIVATE_KEY=... -- npx -y @2sio/mcp

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