Cross-Chain
Definitions
At a high level, bridges offer the following features:
| Feature | Description |
|---|---|
| Arbitrary Messaging Bridge (AMB) | Allows arbitrary messages to be securely relayed from a smart contract on chain 1 to a smart contract on chain 2. AMB provides guarantees that messages delivered to chain 2 represent events finalized on chain 1. |
| Token Bridge | Allows user to lock native tokens or ERC20 tokens on chain 1 and mint claim tokens on chain 2. Bridge maintains the invariant that, for each token minted on chain 2, there exists a corresponding token locked on chain 1. |
Provider Summary
The following providers support Monad Testnet:
TN = testnet, MN = mainnet; ✅ = supported, ⌛️ = in progress, ❓ = unknown, ❌ = won't support
Provider Details
Axelar
Axelar is an interchain platform that connects blockchains to enable universal web3 transactions. By integrating with Axelar, applications built on Monad can now easily send messages and assets between the 49+ blockchains connected via Axelar.
To learn more about Axelar visit our docs and GitHub.
Axelarscan
To view current transactions and live stats about the Axelar network, please visit the Axelarscan block explorer.
Chainlink CCIP
Chainlink Cross-Chain Interoperability Protocol (CCIP) is the standard for cross-chain interoperability. CCIP enables developers to build secure cross-chain apps that can transfer tokens, send messages, and initiate actions across blockchains.
Through the Cross-Chain Token (CCT) standard, CCIP enables token developers to integrate new and existing tokens with CCIP in a self-serve manner in minutes, without requiring vendor lock-in, hard-coded functions, or external dependencies that may limit future optionality. CCTs support self-serve deployments, full control and ownership for developers, zero-slippage transfers, and enhanced programmability via configurable rate limits and reliability features such as Smart Execution. CCIP is powered by Chainlink decentralized oracle networks (DONs)—a proven standard with a track record of securing tens of billions of dollars and enabling over $19 trillion in onchain transaction value.
Key CCIP developer tools:
- CCIP official documentation: start integrating CCIP into your cross-chain application.
- CCIP Token Manager: an intuitive front-end web interface for the deployment of new and management of existing CCTs by their developers, including no-code guided deployments and configuration tools.
- CCIP SDK: a software development kit that streamlines the process of integrating CCIP, allowing developers to use JavaScript to create a token transfer frontend dApp.
Contract Addresses for Monad Testnet:
Circle CCTP
Cross-Chain Transfer Protocol (CCTP) by Circle is a permissionless onchain utility that facilitates USDC transfers securely between supported blockchains via native burning and minting.
Circle created CCTP to improve capital efficiency and minimize trust assumptions when using USDC across blockchains.
CCTP enables developers to build multichain applications that allow users to perform 1:1 transfers of USDC securely across blockchains.
To get started, visit the Circle CCTP documentation
Garden
Garden is transforming Bitcoin interoperability with its next-gen bridge. It is built by the renBTC team using an intents based architecture with trustless settlement, enabling cross-chain Bitcoin swaps in as little as 30 seconds with zero custody risk.
In its first year, Garden processed over $1 billion in volume—proving the market's demand for seamless, cost-effective Bitcoin bridging solutions.
Now, Garden is unlocking a new era of interoperability—supporting non-likewise assets, external liquidity, and a wallet-friendly API—to onboard the next wave of partners and users.
To get started, visit the documentation.
Hyperlane
Hyperlane is a permissionless interoperability protocol for cross-chain communication. It enables message passing and asset transfers across different chains without relying on centralized intermediaries or requiring any permissions.
To get started, visit the Hyperlane documentation.
Hyperlane Explorer
To view status of your cross chain transactions, please visit the Hyperlane Explorer.
LayerZero
LayerZero is an omnichain interoperability protocol that enables cross-chain messaging. Applications built on Monad can use the LayerZero protocol to connect to 35+ supported blockchains seamlessly.
To get started with integrating LayerZero, visit the LayerZero documentation and provided examples on GitHub.
Li.fi
LI.FI delivers a seamless solution for multi-chain payments and swaps through a single unified API and SDK. By combining access to all liquidity sources—including DEX aggregators, bridges, and solvers—it ensures comprehensive coverage across ecosystems. Its smart routing technology identifies the cheapest and fastest path for any payment or trade, optimizing efficiency and cost.
Additionally, LI.FI offers a plug-and-play widget that enables instant, user-friendly payment flows, making integration simple for developers and intuitive for end users.
To get started, visit Li.fi documentation
Polymer
Polymer is an interoperability protocol tailor made for multi-rollup applications. It places control in the hands of the builder, by combining cross-chain merkle proofs and a simple API to allow application builders to flexibly adopt Polymer's infrastructure for their own needs. Prove any action. Cross-chain.
To get started visit the Polymer documentation.
Relay
Relay is the fastest and cheapest way to bridge and transact across chains, offering a multichain payments network that makes swapping and transacting across hundreds of blockchains delightfully simple. Since its launch in 2024, Relay has served over 5 million users, processed 50 million transactions, and facilitated more than $5 billion in volume across 85+ networks.
At its core, Relay combines two powerful components: instant, low-cost cross-chain intents powered by the Relay Protocol, and comprehensive DEX meta-aggregation spanning 85 chains (including Monad), ensuring users always get the best execution.
To get started, visit the Relay documentation
Wormhole
Wormhole is a generic messaging protocol that provides secure communication between blockchains.
By integrating Wormhole, a Monad application can access users and liquidity on > 30 chains and > 7 different platforms.
See this quickstart to get started with integrating Wormhole in your Monad project.
For more information on integrating Wormhole, visit their documentation and the provided GitHub examples.
Contract Addresses for Monad Testnet: