
Web3 development has long been plagued by complexity, especially for developers trying to build user-facing applications that interact with multiple wallets and blockchains. Enter Interchain Kit, the universal wallet adapter that simplifies this entire process, offering a seamless interface for connecting to the growing ecosystem of Cosmos-based and EVM-compatible wallets.

Previously known as Cosmos Kit, Interchain Kit emerged from Cosmology's mission to lower the barrier for frontend developers building blockchain apps. As part of the broader Interchain JavaScript Stack developed by Hyperweb, it plays a central role in enabling accessible, cross-chain development using the world's most popular language: JavaScript.

## From Cosmos Kit to Interchain Kit: The Evolution

Cosmos Kit began as a simple wallet adapter for the Cosmos ecosystem, enabling connections to popular wallets like Keplr, Leap, Cosmostation, and Ledger. Its intuitive API and powerful UI integrations quickly gained traction, attracting adoption from flagship Cosmos applications including Osmosis, the premier DEX of the ecosystem.

As demand for cross-ecosystem interoperability grew, Cosmos Kit transformed into Interchain Kit. This rebranding wasn't just cosmetic. Interchain Kit expanded to include support for EVM wallets like Metamask, allowing developers to integrate Cosmos and Ethereum-compatible wallet connections through a single interface.

## Real-World Impact: From Crypto.com to Osmosis

Interchain Kit helped usher major partners into the Cosmos ecosystem. [Crypto.com integrated their DeFi wallet using Cosmos Kit](https://x.com/pyramation/status/1811864514775908398), enabling millions of users to interact with Cosmos-based applications easily. This was a game-changing milestone that helped demonstrate the maturity of the Cosmos frontend ecosystem.

Likewise, Osmosis adopted Cosmos Kit and Telescope as foundational pieces of their developer stack. This partnership wasn't just a technical integration, it led to broader community tooling like OsmoJS, powered by the CosmJS and Telescope integration, which enables easier TypeScript-based interaction with the Osmosis chain.

## Signing Cosmos Transactions with Metamask? Yes, It's Possible

One of the most exciting features of Interchain Kit is its ability to bridge the user experience between Cosmos and Ethereum ecosystems. Thanks to EIP-712 support via [InterchainJS](/stack/interchainjs), Hyperweb's reengineered successor to CosmJS, developers can now enable Metamask to sign Cosmos transactions. This is a huge leap in wallet interoperability, allowing Ethereum-native users to seamlessly interact with Cosmos-based apps without switching wallets.

### Supporting New Cosmos EVM Chains

This functionality is especially important as new Cosmos EVM chains emerge. These chains combine the robustness of the Cosmos SDK with Ethereum's smart contract standards, enabling smart contracts written in Solidity to benefit from Cosmos's modular architecture and IBC interoperability.

### Expanding to New Ecosystems

Even more compelling is the growing adoption of the Interchain Stack in newly forming ecosystems. Both Ripple and TAC (Token Assets Chain) from Telegram are building new blockchain layers aligned with Cosmos and IBC standards. By leveraging tools like Interchain Kit and InterchainJS, these ecosystems can immediately support user-friendly wallet interactions, including Metamask, while tapping into the full power of the interchain.

Hyperweb's tooling provides the connective tissue to unify these ecosystems under a common development experience, expanding the reach of Cosmos and making cross-chain functionality a default, not an afterthought.

## Interchain Kit: A Cornerstone of the Interweb

Interchain Kit reflects the ethos behind the Interweb—a vision championed by Hyperweb to "make the web whole again" by seamlessly bridging Web2 and Web3. With no-chain tools like Interchain Kit, developers no longer need to grapple with low-level blockchain complexity to build secure, user-friendly dApps.

Together with InterchainJS, Telescope, and Create Interchain App, Interchain Kit forms the backbone of the Interchain JavaScript Stack, empowering developers to launch apps that are fast, scalable, and truly interoperable across blockchain networks.

## Want to Get Started?

The fastest way to experience Interchain Kit is through [**Create Interchain App**](https://github.com/hyperweb-io/create-interchain-app) — our scaffolding tool that sets up a complete dApp with Interchain Kit pre-configured. Whether you're building a wallet, DEX, NFT platform, or cross-chain protocol, you'll have a working app with wallet connections in minutes.

Ready to dive deeper? [Explore the Interchain Kit](/stack/interchain-kit), the [docs](https://docs.hyperweb.io/interchain-kit), and the complete [Hyperweb TypeScript stack](/stack).

Follow [**Hyperweb**](https://x.com/Hyperweb_) for the latest updates.

Let's build the Interweb—together.



Discover how Interchain Kit revolutionizes Web3 development by providing a universal wallet adapter that seamlessly connects Cosmos and EVM ecosystems. Learn about its evolution from Cosmos Kit, real-world adoption by major platforms like Osmosis and Crypto.com, and how it enables Metamask to sign Cosmos transactions while simplifying cross-chain dApp development.

Interchain Kit: The Unified Wallet Interface Powering the Interchain Web