An EVM-compatible blockchain testnet for app-specific chain development, AppChain Testnet (Chain ID 4661) uses ETH gas and integrates seamlessly with standard Ethereum tooling.
AppChain Testnet is an EVM-compatible test network that uses ETH as the native gas token, purpose-built for developing and validating cross-chain bridge flows before mainnet. Common use cases include testing token and message transfers across chains, simulating relayer/oracle behavior, rehearsing liquidity routing, and running integration and security checks in a safe environment. For comparison: average gas cost is approximately $0 to users via faucet ETH; block confirmations are tuned for fast feedback; TPS and network activity vary by validator setup and are designed for bursty, developer-driven workloads rather than sustained public throughput.
Unlike generic testnets, AppChain Testnet is optimized for cross-chain interoperability, offering an ETH-gas, EVM-compatible environment aligned to bridge development and end-to-end message passing. Its developer-centric design prioritizes rapid iteration, predictable behavior for testing failure modes, and easy integration with wallets, RPCs, faucets, and monitoring used in bridge pipelines. Performance highlights for developers: effectively free gas, low-latency confirmations for quick retries, elastic TPS that scales with configuration, and activity patterns centered on integration testing—not public stress tests.
AppChain Testnet uses ETH as the gas token for transaction fees. You can obtain ETH by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge ETH to AppChain Testnet, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select AppChain Testnet as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on AppChain Testnet you can use thirdweb, which provides an easy way to build, monetize and scale your apps, games or agents. You can find detailed guides and documentation on https://portal.thirdweb.com to get started quickly.
To add AppChain Testnet to your wallet, you can connect your wallet and click on [Add to Wallet] button at the top of the page. Alternatively, you can add the network manually using the RPC URL and chain details and add it to your wallet's network settings.
To send ETH on AppChain Testnet, ensure your wallet is connected to the AppChain Testnet network, enter the recipient's address, specify the amount of ETH to send, review the gas fee, and confirm the transaction in your wallet.