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mcp/harbor
Grok

x402 middleware for Grok

com.gadgethumans.swarm/x402-middleware

One-line x402 + Stripe payment middleware for MCP servers. The Stripe for the agent economy.

client:Grok transport:stdio runtime:npm

Install x402 middleware in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "x402-middleware": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@gadgethumans/x402"
      ]
    }
  }
}

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 middleware in other clients

x402 middleware MCP server