SwapKit

Cross-chain swaps made easy

Build Cross-Chain DeFi in Minutes

SwapKit provides everything you need to integrate blockchain functionality into your application with a single, unified API. Now with v4’s enhanced architecture and runtime flexibility.

20+ Blockchains

Support for EVM chains, Bitcoin, Cosmos ecosystem, Solana, Ripple (XRP), and more - all through one consistent interface. Explore Networks →

Multi-Wallet Support

Connect with 20+ wallets including MetaMask, WalletConnect, Ledger, Keystore, and hardware wallets. Wallet Integration →

DeFi Protocols

Built-in integrations with THORChain, Chainflip, 1inch, and other leading DeFi protocols. View API Reference →

Runtime Configuration

New in v4: Update API keys, RPC URLs, and settings at runtime without recreating your client. Learn About v4 →

Quick Start

// @noErrorValidation

import { createSwapKit, Chain, SwapKitApi } from "@swapkit/sdk";

const swapKit = createSwapKit();

await swapKit.connectKeystore(
  [Chain.Ethereum, Chain.Bitcoin, Chain.Ripple],
  "your mnemonic phrase"
);

const ethBalance = await swapKit.getBalance(Chain.Ethereum);
const btcBalance = await swapKit.getBalance(Chain.Bitcoin);
const xrpBalance = await swapKit.getBalance(Chain.Ripple);

const { routes } = await SwapKitApi.getSwapQuote({
  sellAsset: "ETH.ETH",
  sellAmount: "1000000000000000000",
  buyAsset: "BTC.BTC",
  sourceAddress: swapKit.getAddress(Chain.Ethereum),
  destinationAddress: swapKit.getAddress(Chain.Bitcoin),
  slippage: 3,
});

if (routes.length > 0) {
  const txHash = await swapKit.swap({ route: routes[0] });
}

Why SwapKit?

Unified API

One consistent API for all chains and protocols. No need to learn different interfaces for each blockchain. Essential Actions →

Production Ready

Battle-tested in production by THORSwap and other leading DeFi applications. Best Practices →

Modular Design

Use only what you need - from lightweight toolboxes to the full SDK. Framework Integration →

Active Development

Regular updates, new chain integrations, and responsive community support. What’s New →

Popular Integration Paths

Whether you’re building a simple wallet connector or a complex DeFi protocol, SwapKit has the right approach for your needs:

🚀 Quick Start

Perfect for: New developers, prototyping, learning Get up and running in minutes with the complete SDK package. - Full feature set out of the box - All wallets and chains included - Production-ready defaults Get Started →

⚡ Essential Actions

Perfect for: Basic DeFi apps, wallet integrations Learn the core functionality every SwapKit app needs. - Connect wallets across 20+ chains - Send transactions with proper fee handling - Perform cross-chain swaps Essential Actions →

🌐 Multi-Chain Focus

Perfect for: Cross-chain applications, portfolio trackers Dive deep into specific blockchain ecosystems. - EVM networks (Ethereum, Arbitrum, Polygon)

Bitcoin family (BTC, BCH, LTC, DOGE) - Cosmos ecosystem (ATOM, THOR, MAYA) Explore Chains →

🔧 Advanced Development

Perfect for: Custom protocols, enterprise applications Extend SwapKit with your own plugins and wallets. - Create custom plugins for new protocols

Build wallet adapters for new providers - Optimize for production environments Advanced Features →

Features at a Glance

🔗 Cross-Chain Swaps: Seamlessly swap assets across different blockchains
💰 Multi-Chain Wallets: Manage wallets and balances across all supported chains
🔐 Hardware Wallet Support: Full support for Ledger, Trezor, and KeepKey
📊 Real-Time Quotes: Get accurate swap quotes from multiple DEX aggregators
🛠️ Toolbox System: Low-level utilities for direct blockchain interactions
🔌 Plugin Architecture: Extend functionality with custom plugins
📱 Mobile Ready: Works in React Native and mobile environments
⚡ Optimized Performance: Efficient caching and request batching

🚀 Jump Right In!

Experience SwapKit in action with our interactive playgrounds and examples

Official Playgrounds

Online IDEs

StackBlitz

Instant dev environment

CodeSandbox

Collaborative coding

Get Started in 3 Steps

1. Install SwapKit

bash bun add @swapkit/sdk

bash pnpm add @swapkit/sdk

bash npm install @swapkit/sdk

bash yarn add @swapkit/sdk

2. Initialize the SDK

// @noErrorValidation

import { createSwapKit } from "@swapkit/sdk";

const swapKit = createSwapKit({
  config: {
    apiKeys: {
      swapKit: "your-swapkit-api-key",
    },
  },
});

3. Start Building

// @noErrorValidation

import { createSwapKit, Chain, AssetValue, FeeOption } from "@swapkit/sdk";

const swapKit = createSwapKit();

await swapKit.connectEVMWallet([Chain.Ethereum]);

const balance = await swapKit.getBalance(Chain.Ethereum);

const assetValue = AssetValue.from({
  asset: "ETH.ETH",
  value: "0.1",
});

const txHash = await swapKit.transfer({
  assetValue,
  recipient: "0x742d35Cc6634C0532925a3b844Bc9e7595f6E321",
  feeOptionKey: FeeOption.Fast,
});