An EVM-compatible testnet for the Kaia blockchain, Kairos (chain ID 1001) enables fast, low-cost dApp testing with KLAY gas and familiar Ethereum tooling.
Kaia Testnet Kairos is Kaia’s public EVM-compatible test network (chain ID 1001) that mirrors mainnet consensus and gas economics using KLAY as the native currency. It’s used to safely validate smart contracts, token standards (ERC-20/721 and KIP-7/17), cross-chain bridges, fee-delegation flows, oracles, and infra before mainnet. Typical performance: ~1s blocks with immediate finality, median gas price around 25 ston/Gpeb (≈25 gwei; ~0.000525 KLAY for a 21k-gas transfer), and sustained throughput in the hundreds of TPS under load.
Kairos stands out with deterministic ~1s finality on an IBFT-based EVM and native fee delegation, letting dApps or relayers sponsor user gas—ideal for bridge UX and onboarding. It offers predictable low fees (commonly ~25 ston/Gpeb), high throughput (hundreds of TPS), and a long-lived, production-like environment with faucets, public RPCs, and explorer, enabling realistic performance and interoperability testing. Compared with L1s like Ethereum (~12s blocks, <20 TPS), Kairos delivers lower latency and higher throughput while preserving EVM tooling (Solidity, Hardhat/Foundry, MetaMask).
Kaia Testnet Kairos uses KLAY as the gas token for transaction fees. You can obtain KLAY by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge KLAY to Kaia Testnet Kairos, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Kaia Testnet Kairos as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Kaia Testnet Kairos 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 Kaia Testnet Kairos 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 KLAY on Kaia Testnet Kairos, ensure your wallet is connected to the Kaia Testnet Kairos network, enter the recipient's address, specify the amount of KLAY to send, review the gas fee, and confirm the transaction in your wallet.
