Codex Testnet is a public test network that uses ETH as its native gas currency, enabling developers to deploy and validate smart contracts and cross-chain bridge flows end to end. It supports safe testing of deposits/withdrawals, message passing, and failure recovery while profiling gas fees, latency, and throughput without risking real funds. As a testnet, network parameters and state may be reset, and performance can vary across releases.
Compared to production blockchains, Codex Testnet prioritizes developer experimentation and interoperability checks, trading absolute stability for rapid iteration and free test‑ETH costs. It uses ETH for gas, ensuring broad tooling compatibility; however, official performance metrics (average gas cost, block time, TPS, daily activity) are not publicly documented as of Sep 2025—use the network’s explorer or RPC metrics to compare live stats with your target chain. This makes it well‑suited for realistic cross‑chain bridge QA while avoiding mainnet fees and finality risk.
Codex 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 Codex Testnet, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Codex Testnet as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Codex 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 Codex 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 Codex Testnet, ensure your wallet is connected to the Codex 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.