Bankr x402 SDK - Transaction Builder

Generate and validate signed on-chain transactions with the Bankr x402 SDK.

80|30|Updated Jan 15, 2026
One-click install
npx skills add https://github.com/BankrBot/claude-plugins --skill bankr-x402-sdk-transaction-builder
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Bankr x402 SDK - Transaction Builder
Source: https://github.com/BankrBot/claude-plugins/tree/main/x402-sdk-dev/skills/sdk-transaction-builder
Command: npx skills add https://github.com/BankrBot/claude-plugins --skill bankr-x402-sdk-transaction-builder

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Construct and sign complex on-chain transactions (transfers, NFTs, and DeFi operations) using the Bankr x402 SDK, eliminating boilerplate and reducing error-prone manual steps.

Core Features & Use Cases

  • Build transfers (ERC20, ETH) and NFT operations (transfer, mint, buy) across networks.
  • Wrap/unwrap ETH, bridge tokens, and execute DeFi actions with built-in validation and metadata.
  • Generate signed transactions with verifiable metadata suitable for audit trails.

Quick Start

Ask it to build a transfer of 100 USDC to 0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0b.

Frequently Asked Questions about Bankr x402 SDK - Transaction Builder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build and sign on-chain transactions for ERC20 transfers without manual boilerplate?

The Bankr x402 SDK automatically constructs, signs, and validates on-chain transactions for ERC20 transfers by accepting transfer parameters and network context, eliminating manual boilerplate and reducing error-prone steps.

Can I execute NFT mint and transfer operations across multiple blockchain networks?

Yes, you can execute NFT mint and transfer operations across multiple blockchain networks. The SDK handles NFT operations by applying network context and private key authentication to compose validated cross-network transactions.

What's the best way to bridge tokens and wrap ETH using a single SDK?

The best way to bridge tokens and wrap ETH is to leverage the SDK's built-in validation and metadata generation. This securely composes cross-chain bridge operations and DeFi actions while producing auditable, signed transaction metadata.

Do I need a private key and network context to validate cross-chain operations?

Yes, you need a private key and network context to validate cross-chain operations. The SDK requires both inputs to successfully construct, sign, and validate transactions for transfers, NFTs, and cross-chain bridges across multiple networks.

How do I generate signed transactions with verifiable metadata for audit trails?

You generate signed transactions with verifiable metadata for audit trails by using the SDK to compose on-chain transfers or NFT operations. The tool automatically attaches verifiable metadata suitable for audit trails during the signing process.