
Your Cosmos app is wasting bandwidth. Every page load ships megabytes of JavaScript that users don't need. You know InterchainJS could fix this—delivering 90% smaller bundles, seamless cross-chain support, and modern architecture—but who has weeks to spare for a massive migration?

And it's not just bandwidth. Developers building across Cosmos, Ethereum, and Solana are juggling entirely separate libraries, RPC patterns, and mental models. This leads to fragile glue code, duplicated logic, and what Rich Hickey calls “braiding”—a tangled mess of cross-cutting concerns that makes your app harder to reason about, harder to extend, and impossible to optimize.

What if you could slash your bundle size and unify your multi-chain stack through a simple conversation with AI? That’s exactly what the Hyperweb MCP server makes possible.

No manual API mapping. No endless documentation deep-dives. Just describe what you want, and watch AI transform your codebase automatically.

## Why InterchainJS Changes Everything

InterchainJS isn't just another library—it's a complete reimagining of blockchain development for the multi-chain era:

**🎯 90% Smaller Bundles** — Aggressive tree-shaking means you only ship what you actually use  
**🌐 True Multi-Chain Support** — One codebase works across Cosmos, Ethereum, and beyond  
**🔗 Unified APIs** — One library across all supported chains  
**⚡ Modern TypeScript** — Full type safety with intelligent autocompletion

But here's the challenge: migrating from CosmJS's imperative, Cosmos-specific APIs to InterchainJS's declarative, multi-chain architecture requres careful refactoring.

That's where AI agents become your secret weapon.

## Smart Migration, Zero Headaches

MCP agents understand the entire Cosmos ecosystem. Instead of manually parsing CosmJS documentation or untangling complex RPC patterns, you simply describe your app's behavior. The agent handles everything:

- **Protocol Translation** — Converts CosmJS patterns to InterchainJS best practices
- **Type Safety** — Ensures your refactored code is bulletproof
- **Architecture Optimization** — Restructures code for maximum tree-shaking efficiency
- **Multi-Chain Preparation** — Sets up your app for easy chain expansion

Think of it as having a protocol-expert engineer who never sleeps, never makes typos, and always uses the latest tooling.

### CosmJS vs InterchainJS: Technical Deep Dive

| Feature             | CosmJS                         | InterchainJS                    |
| ------------------- | ------------------------------ | ------------------------------- |
| **Architecture**    | Monolithic packages            | Modular, tree-shakeable         |
| **Chain Support**   | Cosmos SDK only                | Multi-chain (Cosmos, EVM, more) |
| **Bundle Strategy** | Ships everything               | Bundle only what you use        |
| **Wallet Handling** | Multiple layers of abstraction | Simpler, flattened architecture |

### Start Your Migration Today

InterchainJS isn't just about smaller bundles—it's about building for the multi-chain future. With AI-powered migration, you can:

- **Reduce bundle size by 90%** through intelligent tree-shaking
- **Support multiple chains** with one unified codebase
- **Improve performance** across all devices and networks
- **Future-proof your application** as new chains integrate seamlessly
- **Stay current** with actively maintained libraries versus deprecated ones

## Get Started in 30 Seconds

1. **Configure your AI assistant** (Cursor or Claude Desktop):

   ```json
   {
   	"mcpServers": {
   		"hyperweb-mcp-server": {
   			"command": "npx",
   			"args": ["-y", "@hyperweb/mcp-server@latest"]
   		}
   	}
   }
   ```

2. **Start building** by asking your AI agent to:

   - "Migrate this CosmJS code to InterchainJS"
   - "Set up Interchain Kit with React"
   - "Generate a Starship config for testing IBC transfers"
   - "Show me Chain Registry v2 usage examples"

3. **Watch as it provides** working code with proper imports and dependencies

**Resources:**

- InterchainJS: [hyperweb-io/interchainjs](https://github.com/hyperweb-io/interchainjs)
- Interchain Kit: [hyperweb-io/interchain-kit](https://github.com/hyperweb-io/interchain-kit)
- MCP Server: [hyperweb-io/mcp](https://github.com/hyperweb-io/mcp)
- Migration Guide: [https://docs.hyperweb.io/interchain-js/migration-from-cosmjs](https://docs.hyperweb.io/interchain-js/migration-from-cosmjs)


Discover how AI agents can automatically migrate your Cosmos applications from the monolithic CosmJS to the tree-shakeable InterchainJS. Learn about bundle size reductions, multi-chain support, and how MCP agents handle the complex API translations for you.

Let AI Agents Handle Your CosmJS Migration to InterchainJS