presign-guard wallet MCP server

x402 examples

Spending limits for AI agents, approved from your phone

Give your agents a wallet without giving them a blank cheque:

• presign-guard-wallet (npm): a viem wallet that checks every signature with presign-guard first (drainers, sanctions, unlimited approvals), keeps to your price per purchase and daily budget, and asks you on Telegram for anything above them. npm i presign-guard-wallet
• presign-guard-agentkit (npm): the same for Coinbase AgentKit agents. Wrap the wallet provider in one line, and every transfer, swap, approval, permit and x402 payment is checked and kept to your limits. npm i presign-guard-agentkit
• presign-guard-wallet-mcp (npm, MCP server): a wallet with spending limits for Claude, Cursor and any MCP client. The agent can pay x402 APIs and send USDC within your budget, and asks you on Telegram above it. npx -y presign-guard-wallet-mcp
• wallet-server: one budget and one set of rules for all your agents, a live dashboard, approvals on the dashboard or Telegram, pause one agent or all, an activity log. It never holds keys or funds: agents still sign and pay themselves.

See the dashboard live (demo, example data) →

import { guardWallet } from "presign-guard-wallet";

const wallet = guardWallet(walletClient, {
  pay, // a fetch that pays x402, or creditKey for prepaid presign-guard checks
  server: { url: process.env.WALLET_SERVER_URL, key: process.env.WALLET_SERVER_KEY },
});
// Under your price: signs. Above it: you get a request on the dashboard and on Telegram.
// Red verdict: never signed. Server unreachable: stops instead of signing.

Try it from your phone: Actions → telegram-demo → Run workflow (a pretend agent, a stub wallet, no money moves).

Paid-API examples

Small, open examples of AI agents combining paid APIs with x402: each call is paid per request in USDC, with no accounts or API keys.

Shortened. The full README is on GitHub.