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A product by Paiva Gomes Advogados

Clav
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ProductsWallet verification

Proof of who owns each self-custody wallet

Before you release a withdrawal to an external wallet, send your customer a verification link. The result is stored in Clav with the full history of the request.

See it on the home page
List of verified self-custody wallets in Clav, with network, address, customer, method and status
Screen from the Clav app, with data from a test organization.

What it does

  • Message signing

    Your customer signs a message with the wallet, which costs nothing, moves nothing and gives no one access to the wallet.

  • Your brand on the page

    The verification link opens a page with your name and logo.

  • Bitcoin micro-transaction

    On Bitcoin, the customer can also prove ownership by sending from 546 to 2,000 sats.

  • REST API and signed webhooks

    Create requests from your systems with a dedicated token scope and receive a signed webhook when each wallet is verified.

How it works

  1. 1

    Create the request

    In the dashboard or through the API, enter the network, the address and your customer's ID. Clav generates a verification link.

  2. 2

    Your customer signs

    The link opens a page with your name and logo. The customer signs a message with the wallet, which costs nothing, moves nothing and gives no one access to the wallet.

  3. 3

    The wallet is verified

    The address shows up as verified in Clav, with every attempt recorded. Your systems receive a signed webhook.

Supported networks

  • Ethereum, Polygon, Arbitrum, Optimism, Base, BNB Smart Chain, Avalanche, Bitcoin, Solana, Tron
  • Mainnet only. Test networks are rejected.
  • Wallet connection via WalletConnect
  • Manual signature, for hardware wallets and command-line tools

Frequently asked questions

Ethereum, Polygon, Arbitrum, Optimism, Base, BNB Smart Chain, Avalanche, Bitcoin, Solana and Tron, on mainnet. Your customer can sign through WalletConnect or paste a signature made elsewhere, and on Bitcoin there is also a micro-transaction option.

No. Signing a message costs nothing, moves no funds and gives no one access to the wallet.

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