Terms of use

Chainmail is software that runs in your browser. It lets you send end-to-end encrypted messages over the XMTP network and send crypto payments from your own wallet. It's an early version, provided free and as it is, while we build it.

• We never hold your funds or keys. Payments go directly from your wallet to the other person's, on the blockchain. We can't reverse, refund or cancel them.
• Check before you approve. Your wallet shows the exact amount, recipient and fee. Blockchain transactions are final.
• Never share your recovery phrase with anyone, including us. We will never ask for it.
• Payments currently use Base Sepolia, a test network with no real value, unless the app says otherwise.

Anyone can message any wallet. Chats from people you don't know arrive as requests. Never pay, sign or approve anything because someone in a chat asked you to, unless you know and trust them. Chainmail only offers to pay requests it can fully verify, but it can't tell you whether the person asking is honest.

Don't use Chainmail to:

• break the law, or help anyone else break it;
• scam, harass, threaten or impersonate people;
• send spam or malware;
• interfere with the app, the XMTP network or other people's use of them.

Because messages are end-to-end encrypted, we can't read or moderate them. You can block anyone, and other XMTP apps may apply their own rules.

Chainmail is provided "as is", without warranties. It depends on networks we don't control (XMTP, Base, Ethereum, wallet providers), which can be slow, change or go down. Messages can fail to send, and chats on one device aren't automatically on another. Keep a backup (Settings → History) of anything important. To the extent the law allows, we're not liable for losses from using the app, including lost messages or mistaken payments.

How your information is handled is explained in the privacy page.

We'll update these terms as Chainmail grows, and change the date at the top when we do. Using the app after a change means you accept the new terms. A contact address will be published here before public launch.