> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mayan.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Wallets

> Add cross-chain swaps to your wallet and earn on every swap.

Wallets integrate Mayan to give users in-app swapping across chains. MetaMask, Phantom, OKX Wallet and Backpack run their swap experience this way: the interface belongs to the wallet, and routing and execution run underneath it.

## What integrating with Mayan unlocks

* **Any token to any chain.** Users swap between any supported assets, on one chain or across two, without leaving the wallet.
* **One move.** A cross-chain swap is a single signature, not a bridge followed by a swap.
* **Instant settlement.** Swaps complete in seconds.
* **Non-custodial.** Funds move between the user's own addresses, so the wallet's security model is unchanged.

Most wallets integrate through the [SDK](/build/sdk). The [widget](/integration/swap-widget) is a drop-in alternative if you would rather not build the interface.

## Fees

You set a referrer address and a fee in basis points on the quote request. The fee is collected onchain on every swap routed through your integration, with no invoicing and nothing to reconcile. See [fees & earning](/build/fees-earning).

## Use cases

* [Swap](/use-cases/swap): trade any asset to any asset in-app
* [Bridge](/use-cases/bridge): move holdings between chains
* [Deposit & Withdraw](/use-cases/deposit): fund and exit other apps from the wallet

## Case studies

* [**MetaMask**](https://mayan.finance/blog/mayan-powers-faster-cross-chain-swaps-inside-metamask) improved cross-chain quote latency for millions of users with Mayan.
* [**imToken**](https://mayan.finance/blog/mayan-unlocks-cross-chain-swaps-inside-imtoken-wallet) unlocked cross-chain swaps inside its self-custody wallet with Mayan.
* [**Gem Wallet**](https://mayan.finance/blog/how-gem-wallet-took-self-custody-multichain-with-mayan) added cross-chain with Mayan, without compromising its non-custodial design.

## Next steps

<CardGroup cols={3}>
  <Card title="Widget" icon="window" href="/integration/swap-widget">
    A prebuilt swap interface you can embed.
  </Card>

  <Card title="SDK" icon="cube" href="/build/sdk">
    Build the swap flow into your own interface instead.
  </Card>

  <Card title="Fees & Earning" icon="coins" href="/build/fees-earning">
    Set a referrer address and earn on every swap you route.
  </Card>
</CardGroup>