SIP-03: Sei Address Association
After the SIP-03 upgrade, native Cosmos addresses sei1... will stop working. To keep access to your 
SEI funds and stake, you need to associate your EVM address 0x... with the matching Cosmos address on-chain. Connect both wallets below and this page walks you through it — the association itself is free.
Both addresses belong to you: one private key always has two forms — 0x... on the EVM side and sei1... on the Cosmos side. Associating them just tells the chain they are the same account.
The Sei team provides an end-to-end migration helper at dashboard.sei.io/evm-upgrade — try it first if you prefer a one-click flow that works with most wallets.
SEI onlyThis page only handles association for the native SEI token. For USDC
, USDT
, ATOM, WBTC and other IBC-bridged assets, follow the official Sei migration guide — each token has its own bridge / swap route.
- Step 2Association (free)
- Step 3Transfer from Cosmos
Cosmos wallet (sei1…)
The Keplr / Leap account that holds your SEI today. Optional, but with it connected this page can pay the gas and send the funds for you — no manual copy-pasting.
EVM wallet (0x…)
The wallet that should own the tokens after migration. Any injected EVM wallet works: MetaMask, Compass, Rabby, Tangem, Trust Wallet, OKX.
Sei is moving from a Cosmos stack to a pure EVM (SIP-03). After the upgrade, native Cosmos addresses sei1... and Cosmos transactions will stop working. To preserve access to funds, you need to perform a one-time on-chain association linking your EVM address 0x... with the matching Cosmos address sei1.... Signing the association message is enough — the protocol publishes the pubkey and registers the link, and charges nothing for it.
Details: docs.sei.io/learn/sip-03-migration