An EVM-compatible Filecoin testnet (chain ID 314159) for staging network upgrades and smart contracts, using tFIL and production-like storage economics.
Filecoin - Calibration is the persistent public testnet that mirrors Filecoin mainnet behavior for storage, retrieval, and FVM smart contracts, using tFIL. It’s used to trial storage provider operations (sealing, PoSt), storage deal workflows, dApps, network upgrades, and bridge integrations before mainnet. Expect ~30s block times (epochs), low single‑digit TPS for chain messages, and near‑zero gas fees via faucets, enabling rapid, low‑cost iteration.
Calibration is unique because it recreates Filecoin’s storage economy—Proof‑of‑Replication/Proof‑of‑SpaceTime, storage and retrieval markets, and miner lifecycle—rather than optimizing for raw TPS. It runs predictable ~30s epochs and tipsets tuned for large proof/deal messages (chain TPS typically low single digits) with effectively free gas in tFIL, so activity is dominated by sector proofs and deal traffic instead of transfers. With FVM/FEVM, developers can test EVM smart contracts that natively interact with Filecoin storage actors, a capability uncommon on other testnets.
Filecoin - Calibration testnet uses tFIL as the gas token for transaction fees. You can obtain tFIL by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge tFIL to Filecoin - Calibration testnet, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Filecoin - Calibration testnet as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Filecoin - Calibration 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 Filecoin - Calibration 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 tFIL on Filecoin - Calibration testnet, ensure your wallet is connected to the Filecoin - Calibration testnet network, enter the recipient's address, specify the amount of tFIL to send, review the gas fee, and confirm the transaction in your wallet.