bankr-x402-sdk-dev Plugin

Web3 development integration with the @bankr/sdk for advanced use cases.

note

The SDK returns transaction data for you to submit using your own wallet infrastructure. If you want Bankr to handle transactions, use the Agent API or bankr-agent plugin instead.

Installation

claude plugin install bankr-x402-sdk-dev

Capabilities

Market Analysis

Build features using market data:

"get token prices for my dashboard"
"implement trending tokens display"
"add technical analysis charts"

Portfolio Tracking

Track user portfolios:

"fetch user balances across chains"
"calculate portfolio value in USD"
"track position P&L"

Token Swaps

Implement swap functionality:

"add swap feature with 0x routing"
"implement cross-chain bridging"
"handle approval transactions"

Leveraged Trading

Integrate Avantis trading:

"implement leveraged positions"
"add stop-loss and take-profit"
"track open positions"

SDK Features

The plugin helps you implement:

Feature	Supported Chains
Prices & Charts	All
Token Swaps	EVM chains
Cross-chain Bridges	EVM chains
Leveraged Trading	Base (Avantis)
Portfolio Tracking	All
NFT Operations	EVM chains

x402 Micropayments

The SDK uses x402 micropayments ($0.01 USDC per request on Base):

"how do x402 payments work?"
"implement payment handling"
"handle 402 responses"

Your wallet signs payment transactions automatically — USDC is deducted from your wallet on Base.

Example: Portfolio Dashboard

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

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

async function getPortfolio() {
  const result = await client.promptAndWait({
    prompt: 'what are my token balances on all chains?',
  });

  return result.response;
}

async function getTokenPrice(token: string) {
  const result = await client.promptAndWait({
    prompt: `what is the price of ${token}?`,
  });

  return result.response;
}

async function executeSwap(amount: number, from: string, to: string) {
  const result = await client.promptAndWait({
    prompt: `swap $${amount} of ${from} to ${to}`,
  });

  // SDK returns transaction data - you must submit it yourself
  if (result.transactions?.length) {
    for (const tx of result.transactions) {
      // Submit using your wallet (e.g., viem walletClient)
      // const hash = await walletClient.sendTransaction(tx.metadata.transaction);
    }
  }

  return {
    response: result.response,
    transactions: result.transactions,
  };
}

Limitations

Through the SDK, these are not supported:

• Solana operations (use API directly)
• Polymarket betting (use API directly)

For full feature access, use the Agent API directly or the bankr-agent plugin.