Piprail

Name: Piprail
Author: piprail

@piprail

About Piprail

Hand any AI agent a budget-capped wallet to pay, discover & register x402 payment-gated URLs across every chain. Local, self-custodial, no backend, no fee.

#x402 #agent-payments #crypto-payments #usdc #stablecoin #multichain #wallet #autonomous-payments #web3

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "piprail": {
      "command": "npx",
      "args": [
        "-y",
        "@piprail/mcp"
      ],
      "env": {
        "PIPRAIL_PRIVATE_KEY": "<YOUR_WALLET_KEY>",
        "PIPRAIL_CHAIN": "base",
        "PIPRAIL_MAX_AMOUNT": "0.10",
        "PIPRAIL_MAX_TOTAL": "10.00",
        "PIPRAIL_TOKENS": "USDC"
      }
    }
  }
}

Tools

No tools detected

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is Piprail?

Piprail is an MCP server that provides any AI agent (Claude Desktop, Cursor, Claude Code, Windsurf, VS Code, Cline) with a budget-capped wallet to autonomously pay x402 ("402 Payment Required") payment-gated URLs. It runs locally with your wallet and a spend policy the model cannot exceed — no backend, no custody, no facilitator, no fee.

How to use Piprail?

Run npx -y @piprail/mcp, add the config block (set your wallet key and spend caps via environment variables like PIPRAIL_MAX_AMOUNT, PIPRAIL_MAX_TOTAL, PIPRAIL_TOKENS, PIPRAIL_HOSTS, and PIPRAIL_CHAIN), then restart your client. The server exposes five tools for discovering, quoting, planning, paying, and registering x402 endpoints.

Key features of Piprail

Five tools for the full x402 payment lifecycle.
Budget-capped wallet enforced before any on-chain send.
Supports every major EVM chain plus Solana, TON, Tron, NEAR, Sui, Aptos, Algorand, Stellar, and XRP Ledger.
Works with USDC, USDT, and native coin across chains.
Wallet key never leaves your machine — no back end or custody.
Runs locally with no facilitator and no additional fee.