> For the complete documentation index, see [llms.txt](https://x402.gitbook.io/x402/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://x402.gitbook.io/x402/core-concepts/wallet.md).

# Wallet

In x402, a wallet is both a payment mechanism and a form of unique identity for buyers and sellers. Wallet addresses are used to send, receive, and verify payments, while also serving as identifiers within the protocol.

#### Role of the Wallet

**For Buyers**

Buyers use wallets to:

* Store USDC/crypto
* Sign payment payloads
* Authorize onchain payments programmatically

Wallets enable buyers, including AI agents, to transact without account creation or credential management.

**For Sellers**

Sellers use wallets to:

* Receive USDC/crypto payments
* Define their payment destination within server configurations

A seller's wallet address is included in the payment requirements provided to buyers.

[CDP's Wallet API ](https://docs.cdp.coinbase.com/wallet-api-v2/docs/welcome)is our recommended option for programmatic payments and secure key management.

#### Summary

* Wallets enable programmatic, permissionless payments in x402.
* Buyers use wallets to pay for services.
* Sellers use wallets to receive payments.
* Wallet addresses also act as unique identifiers within the protocol.


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