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Piprail

@piprail

Repository

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

Basic information

Category

Other

Transports

stdio

Publisher

piprail

Submitted by

John Weeks

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.

Use cases of Piprail

  • AI agents autonomously paying for APIs within a strict budget.
  • Discovering which x402-enabled endpoints are available (

Comments

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