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The Avalanche SDK for TypeScript is a modular suite of tools designed for building powerful applications on the Avalanche ecosystem. Whether you’re building DeFi applications, NFT platforms, or cross-chain bridges, our SDKs provide everything you need.

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Core Capabilities

  • Direct Chain Access - RPC calls, wallet integration, and transaction management
  • Indexed Data & Metrics - Access Glacier Data API & Metrics API with type safety
  • Interchain Messaging - Build cross-L1 applications with ICM/Teleporter
Developer Preview: This suite of SDKs is currently in beta and is subject to change. We’d love to hear about your experience! Share your feedback here. Use in production at your own risk.

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Which SDK Should I Use?

Choose the right SDK based on your specific needs:
SDK PackageDescriptionBest For
@avalanche-sdk/clientDirect blockchain interaction - transactions, wallets, RPC callsDApps, wallets, trading bots
@avalanche-sdk/chainkitComplete suite: Data, Metrics and Webhooks APIAnalytics, explorers, monitoring
@avalanche-sdk/interchainSend messages between Avalanche L1s using ICM/TeleporterCross-chain apps, bridges

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Quick Start

  • npm
  • yarn
  • pnpm
npm install @avalanche-sdk/client

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Basic Example

import { createClient } from '@avalanche-sdk/client';

// Initialize the client
const client = createClient({
  network: 'mainnet'
});

// Get balance
const balance = await client.getBalance({
  address: '0x...',
  chainId: 43114
});

console.log('Balance:', balance);

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Available SDKs

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Client SDK

The main Avalanche client SDK for interacting with Avalanche nodes and building blockchain applications. Key Features:
  • Complete API coverage for P-Chain, X-Chain, and C-Chain
  • Full viem compatibility - anything you can do with viem works here
  • TypeScript-first design with full type safety
  • Smart contract interactions with first-class APIs
  • Wallet integration and transaction management
  • Cross-chain transfers between X, P and C chains
Common Use Cases:
  • Retrieve balances and UTXOs for addresses
  • Build, sign, and issue transactions to any chain
  • Add validators and delegators
  • Create subnets and blockchains
  • Convert subnets to L1s

Get Started with Client SDK

Learn how to integrate blockchain functionality into your application

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ChainKit SDK

Combined SDK with full typed coverage of Avalanche Data (Glacier) and Metrics APIs. Key Features:
  • Full endpoint coverage for Glacier Data API and Metrics API
  • Strongly-typed models with automatic TypeScript inference
  • Built-in pagination helpers and automatic retries/backoff
  • High-level helpers for transactions, blocks, addresses, tokens, NFTs
  • Metrics insights including network health, validator stats, throughput
  • Webhook support with payload shapes and signature verification
API Endpoints:

Get Started with ChainKit SDK

Access comprehensive blockchain data and analytics

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Interchain SDK

SDK for building cross-L1 applications and bridges. Key Features:
  • Type-safe ICM client for sending cross-chain messages
  • Seamless wallet integration with existing wallet clients
  • Built-in support for Avalanche C-Chain and custom subnets
  • Message tracking and delivery confirmation
  • Gas estimation for cross-chain operations
Use Cases:
  • Cross-chain token bridges
  • Multi-L1 governance systems
  • Interchain data oracles
  • Cross-subnet liquidity pools

Get Started with Interchain SDK

Build powerful cross-chain applications

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Next Steps

View Examples

Explore code examples and tutorials

API Reference

Detailed API documentation

Join Community

Get help from the community

GitHub

View source code and contribute
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