How do I install the Bankr x402 SDK - Transaction Builder skill?

Run npx skillmds@latest add enuno/bankr-x402-sdk-transaction-builder in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Bankr x402 SDK - Transaction Builder safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Bankr x402 SDK - Transaction Builder?

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Is Bankr x402 SDK - Transaction Builder free to use?

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Who published Bankr x402 SDK - Transaction Builder?

enuno (@enuno) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Bankr x402 SDK - Transaction Builder by enuno

Name: Bankr x402 SDK - Transaction Builder
Rating: 4.2 (5 reviews)
Author: enuno

Bankr x402 SDK - Transaction Builder

This skill should be used when the user asks to "send tokens", "transfer ETH", "send USDC to", "transfer NFT", "wrap ETH", "unwrap WETH", "bridge tokens", "mint NFT", "buy NFT", "approve token", "build transaction", "DeFi transaction", or needs to build transactions for transfers, approvals, NFT operations, cross-chain bridges, ETH/WETH conversions, or DeFi interactions beyond simple swaps using the Bankr SDK.

enuno Updated Sep 9, 2026 1 repo stars

File contents

SDK Transaction Builder

Build blockchain transactions for transfers, NFTs, bridges, and DeFi operations.

Transaction Types

Type	Description	Example Prompt
`transfer_erc20`	Send ERC20 tokens	"Send 100 USDC to 0x..."
`transfer_eth`	Send native ETH	"Send 0.1 ETH to 0x..."
`convert_eth_to_weth`	Wrap ETH	"Wrap 0.5 ETH"
`convert_weth_to_eth`	Unwrap WETH	"Unwrap 1 WETH"
`transfer_nft`	Send NFT	"Transfer my NFT #123 to 0x..."
`buy_nft`	Purchase NFT	"Buy the cheapest Pudgy Penguin"
`mint_manifold_nft`	Mint from Manifold	"Mint from Manifold at 0x..."
`mint_seadrop_nft`	Mint from SeaDrop	"Mint from SeaDrop at 0x..."
`swapCrossChain`	Bridge tokens	"Bridge 100 USDC from Ethereum to Base"

Prompt Patterns

# Transfers
"Send 100 USDC to 0x742d35..."
"Transfer 0.5 ETH to vitalik.eth"
"Send 50 USDC to 0x123... on Base"

# ETH/WETH
"Wrap 0.5 ETH to WETH"
"Unwrap 1 WETH to ETH"

# NFTs
"Transfer my Pudgy Penguin #1234 to 0x..."
"Buy the cheapest Pudgy Penguin on OpenSea"
"Mint NFT from Manifold contract 0x..."

# Cross-Chain
"Bridge 100 USDC from Ethereum to Base"
"Move 0.5 ETH from Base to Ethereum"

Usage

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

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

// Transfer tokens
const result = await client.promptAndWait({
  prompt: "Send 100 USDC to 0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
});

if (result.status === "completed" && result.transactions) {
  const tx = result.transactions[0].metadata.transaction;
  await wallet.sendTransaction(tx);
}

Transaction Metadata

All transactions include metadata for verification:

const tx = result.transactions[0];
const meta = tx.metadata.__ORIGINAL_TX_DATA__;

console.log(`Chain: ${meta.chain}`);
console.log(`Amount: ${meta.inputTokenAmount} ${meta.inputTokenTicker}`);
console.log(`To: ${meta.receiver}`);
console.log(`Message: ${meta.humanReadableMessage}`);

Timing Guidelines

Operation	Typical Time
ERC20/ETH transfer	2-5s
Wrap/Unwrap	2-5s
NFT transfer	3-5s
NFT purchase	5-10s
Cross-chain bridge	10-30s

Related Skills

sdk-token-swaps: Token swap patterns and approval handling
sdk-capabilities: Full list of supported operations
sdk-wallet-operations: Client setup and configuration

---name: bankr-x402-sdk-transaction-builderdescription: This skill should be used when the user asks to "send tokens", "transfer ETH", "send USDC to", "transfer NFT", "wrap ETH", "unwrap WETH", "bridge tokens", "mint NFT", "buy NFT", "approve token", "build transaction", "DeFi transaction", or needs to build transactions for transfers, approvals, NFT operations, cross-chain bridges, ETH/WETH conversions, or DeFi interactions beyond simple swaps using the Bankr SDK.--- # SDK Transaction Builder Build blockchain transactions for transfers, NFTs, bridges, and DeFi operations. ## Transaction Types | Type | Description | Example Prompt | |------|-------------|----------------| | `transfer_erc20` | Send ERC20 tokens | "Send 100 USDC to 0x..." | | `transfer_eth` | Send native ETH | "Send 0.1 ETH to 0x..." | | `convert_eth_to_weth` | Wrap ETH | "Wrap 0.5 ETH" | | `convert_weth_to_eth` | Unwrap WETH | "Unwrap 1 WETH" | | `transfer_nft` | Send NFT | "Transfer my NFT #123 to 0x..." | | `buy_nft` | Purchase NFT | "Buy the cheapest Pudgy Penguin" | | `mint_manifold_nft` | Mint from Manifold | "Mint from Manifold at 0x..." | | `mint_seadrop_nft` | Mint from SeaDrop | "Mint from SeaDrop at 0x..." | | `swapCrossChain` | Bridge tokens | "Bridge 100 USDC from Ethereum to Base" | ## Prompt Patterns ``` # Transfers "Send 100 USDC to 0x742d35..." "Transfer 0.5 ETH to vitalik.eth" "Send 50 USDC to 0x123... on Base" # ETH/WETH "Wrap 0.5 ETH to WETH" "Unwrap 1 WETH to ETH" # NFTs "Transfer my Pudgy Penguin #1234 to 0x..." "Buy the cheapest Pudgy Penguin on OpenSea" "Mint NFT from Manifold contract 0x..." # Cross-Chain "Bridge 100 USDC from Ethereum to Base" "Move 0.5 ETH from Base to Ethereum" ``` ## Usage ```typescript import { BankrClient } from "@bankr/sdk"; const client = new BankrClient({ privateKey: process.env.BANKR_PRIVATE_KEY as `0x${string}`, }); // Transfer tokens const result = await client.promptAndWait({ prompt: "Send 100 USDC to 0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0", }); if (result.status === "completed" && result.transactions) { const tx = result.transactions[0].metadata.transaction; await wallet.sendTransaction(tx); } ``` ## Transaction Metadata All transactions include metadata for verification: ```typescript const tx = result.transactions[0]; const meta = tx.metadata.__ORIGINAL_TX_DATA__; console.log(`Chain: ${meta.chain}`); console.log(`Amount: ${meta.inputTokenAmount} ${meta.inputTokenTicker}`); console.log(`To: ${meta.receiver}`); console.log(`Message: ${meta.humanReadableMessage}`); ``` ## Timing Guidelines | Operation | Typical Time | |-----------|--------------| | ERC20/ETH transfer | 2-5s | | Wrap/Unwrap | 2-5s | | NFT transfer | 3-5s | | NFT purchase | 5-10s | | Cross-chain bridge | 10-30s | ## Related Skills - **sdk-token-swaps**: Token swap patterns and approval handling - **sdk-capabilities**: Full list of supported operations - **sdk-wallet-operations**: Client setup and configuration

Frequently asked questions