xmtp

XMTP V3 changes how identity works for messaging.

In V2, your inbox was your wallet — tightly bound to a single ETH address. 

Yesterday's V3 update decoupled that. Here's what changed 👇

Your old V2 ETH address becomes just one linked identity in V3.

Your inbox is now portable, extensible, and future-proof — no longer stuck to one chain or key.

Bring your own identities and switch them anytime.

It unlocks:

• Passkey support
• Cross-chain identity
• Bring your own keys, wallets, and names

Your inbox is truly yours — flexible, portable, and no longer chained to a single wallet.

In V3, your inbox has a new unique identifier: inboxId.

✅ Controlled by passkeys or wallets
✅ Links multiple identities (ETH, Solana, more)
✅ Resolves names from any linked identity