TypeScript SDK

The T402 TypeScript SDK provides comprehensive support for HTTP-native stablecoin payments.

Packages

Package	Description	npm
`@t402/core`	Protocol types and HTTP utilities
`@t402/evm`	EVM chains (Ethereum, Arbitrum, Base, etc.)
`@t402/ton`	TON blockchain support
`@t402/tron`	TRON blockchain support
`@t402/wdk`	Tether WDK integration
`@t402/wdk-gasless`	Gasless payments (WDK + ERC-4337)
`@t402/wdk-bridge`	Cross-chain bridge (WDK + LayerZero)
`@t402/mcp`	MCP server for AI agents

Quick Install

# Core + EVM (most common)
pnpm add @t402/core @t402/evm
 
# All packages
pnpm add @t402/core @t402/evm @t402/ton @t402/tron @t402/wdk @t402/wdk-gasless @t402/wdk-bridge @t402/mcp

Architecture

@t402/core          Base types, HTTP utilities
    │
    ├── @t402/evm   EVM mechanism (EIP-3009, ERC-4337, LayerZero)
    │
    ├── @t402/ton   TON mechanism (Jettons)
    │
    ├── @t402/tron  TRON mechanism (TRC-20)
    │
    └── @t402/wdk   Tether WDK integration
        │
        ├── @t402/wdk-gasless  ERC-4337 gasless
        │
        └── @t402/wdk-bridge   LayerZero bridge

HTTP Framework Integrations

Framework	Package	Install
Express.js	`@t402/express`	`pnpm add @t402/express`
Next.js	`@t402/next`	`pnpm add @t402/next`
Hono	`@t402/hono`	`pnpm add @t402/hono`

Client Wrappers

Client	Package	Install
Fetch	`@t402/fetch`	`pnpm add @t402/fetch`
Axios	`@t402/axios`	`pnpm add @t402/axios`

Requirements

Node.js 18+ or Bun 1.0+
TypeScript 5.0+ (recommended)
ESM or CommonJS supported

@t402/wdk-gasless