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mcp/harbor
Grok

PipRail for Grok

io.github.piprail/mcp

Budget-bound x402 payment wallet for AI agents — pays HTTP 402 URLs, capped locally. No backend.

client:Grok transport:stdio runtime:npm

Install PipRail 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": {
    "mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@piprail/mcp"
      ],
      "env": {
        "PIPRAIL_PRIVATE_KEY": "<PIPRAIL_PRIVATE_KEY>",
        "PIPRAIL_CHAIN": "<PIPRAIL_CHAIN>",
        "PIPRAIL_CHAINS": "<PIPRAIL_CHAINS>",
        "PIPRAIL_MAX_AMOUNT": "<PIPRAIL_MAX_AMOUNT>",
        "PIPRAIL_MAX_TOTAL": "<PIPRAIL_MAX_TOTAL>",
        "PIPRAIL_MAX_TOTAL_DENOM": "<PIPRAIL_MAX_TOTAL_DENOM>",
        "PIPRAIL_MAX_PAYMENTS": "<PIPRAIL_MAX_PAYMENTS>",
        "PIPRAIL_MAX_PAYMENTS_PER_WINDOW": "<PIPRAIL_MAX_PAYMENTS_PER_WINDOW>",
        "PIPRAIL_WARN_AT_FRACTION": "<PIPRAIL_WARN_AT_FRACTION>",
        "PIPRAIL_SPEND_LOG": "<PIPRAIL_SPEND_LOG>",
        "PIPRAIL_EVENT_LOG": "<PIPRAIL_EVENT_LOG>",
        "PIPRAIL_TOKENS": "<PIPRAIL_TOKENS>",
        "PIPRAIL_SCHEMES": "<PIPRAIL_SCHEMES>"
      }
    }
  }
}

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

PipRail in other clients

PipRail MCP server