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mcp/harbor
Grok

x402 mcp server for Grok

io.github.jmthomasofficial/x402-mcp-server

JMT x402: 35 pay-per-call Base/USDC tools for agents, auto-paid via x402 v2. No API key.

client:Grok transport:stdio runtime:npm

Install x402 mcp server in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "x402-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@jmthomasofficial/x402-mcp-server"
      ],
      "env": {
        "JMT_X402_PRIVATE_KEY": "<JMT_X402_PRIVATE_KEY>"
      }
    }
  }
}

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

x402 mcp server in other clients

x402 mcp server MCP server