Ink Sepolia is the ETH‑denominated testnet for the Ink network, used to safely test cross‑chain bridge flows, smart contracts, wallets, and end‑to‑end dApp integrations before mainnet deployment. It mirrors mainnet fee semantics so developers can validate upgrades, monitor events, and run QA without risking real funds. As of Sep 2025, official performance metrics (avg gas cost, block speed, TPS, network activity) are not publicly published; faucet‑funded gas makes costs effectively near‑zero and values vary by node, so verify real‑time figures via your RPC/telemetry.
Ink Sepolia is unique in pairing ETH‑native gas with a dedicated staging environment tailored for bridge and interoperability testing, making results more reproducible than on generic testnets. Unlike high‑throughput L2s that publish strict benchmarks, there are no authoritative numbers for avg gas cost, block speed, TPS, or activity as of Sep 2025; expect negligible gas fees and variable throughput typical of a developer testnet. This reliability‑first, parity‑with‑mainnet design streamlines pre‑deployment validation and cross‑chain QA.
Ink Sepolia 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 Ink Sepolia, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Ink Sepolia as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Ink Sepolia 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 Ink Sepolia 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 Ink Sepolia, ensure your wallet is connected to the Ink Sepolia network, enter the recipient's address, specify the amount of ETH to send, review the gas fee, and confirm the transaction in your wallet.