Bankr X402 SDK Wallet Operations

This handles wallet initialization for Bankr's x402 micropayment protocol, which charges $0.01 per request. You'll configure a two-wallet system: one private key for signing payments and an optional second address for receiving swapped tokens and NFTs. The setup is straightforward if you're already working with Bankr's SDK, just pass your private key as a hex string. Worth noting that the context wallet defaults to your payment wallet if you don't specify one separately. The protocol itself is interesting, basically enabling per-request micropayments for API calls, though you're locked into their payment rails once you integrate it.

GitHub stars: 80
last updated: Aug 21, 2026

View on GitHub

Install

$ npx -y skills add bankrbot/claude-plugins --skill 'Bankr x402 SDK - Wallet Operations' --agent claude-code

Installs into .claude/skills of the current project.

Files

SDK Wallet Operations

Initialize and configure the BankrClient with proper wallet setup.

Two-Wallet System

Wallet	Purpose	Required
Payment (`privateKey`)	Signs x402 micropayments ($0.01/request)	Yes
Context (`walletAddress`)	Receives swapped tokens, NFTs	No (defaults to payment wallet)

Basic Setup

import { BankrClient } from "@bankr/sdk";

const client = new BankrClient({
  privateKey: process.env.BANKR_PRIVATE_KEY as `0x${string}`,
});

const result = await client.promptAndWait({
  prompt: "What are my balances?",
});

Separate Wallets (Recommended)

For enhanced security, use different wallets for payments and receiving:

const client = new BankrClient({
  // Hot wallet with minimal USDC for payments
  privateKey: process.env.PAYMENT_WALLET_PK as `0x${string}`,
  // Cold/trading wallet receives tokens
  walletAddress: process.env.RECEIVING_WALLET,
});