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

# Kraken Wallet: Personalized DeFi Yield Inside a Self-Custody Wallet

> How Kraken Wallet uses the vaults.fyi API to surface personalized DeFi earning opportunities inside its native wallet UI across Ethereum, Base, Optimism, Arbitrum, and Polygon.

[Kraken Wallet](https://www.kraken.com/wallet) is a self-custody wallet built to connect users to the decentralized web safely and securely. Through the vaults.fyi API, Kraken powers analytics, personalized yield suggestions, and portfolio tracking across multiple protocols and networks — all within the native wallet interface.

This integration is a core part of Kraken's strategy to establish itself as a leading wallet for DeFi, treating Earn as a first-class product experience rather than an afterthought.

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## How It Works

**Token-level yield suggestions.** When users view their balances and select a specific asset, the vaults.fyi API surfaces relevant Earn opportunities for that token, meeting users at the moment of intent.

**Explore tab.** Powered by vaults.fyi market data, the Explore tab lets users browse DeFi opportunities across major protocols without leaving the wallet.

**Multi-chain coverage.** The integration spans Ethereum Mainnet, Base, Optimism, Arbitrum, and Polygon, giving users a cross-chain view of yield opportunities from a single interface.

**Curated protocol selection.** Users can access yields from dozens of leading protocols and filter by their preferences.

## API Capabilities Used

The integration relies on core vaults.fyi API categories:

* **Market data:** APY, TVL, and vault metadata (icons, descriptions, etc.) across protocols and networks.
* **Portfolio tracking:** Accurate position values, transaction events, and returns accrued on each yield-bearing position.

## Why Kraken Built This with vaults.fyi

Building DeFi yield analytics in-house would require maintaining protocol-specific indexers, normalizing yield calculations across incompatible schemas, and tracking coverage across five networks continuously. By integrating vaults.fyi, Kraken reduced that to a single API, enabling the team to focus on product experience rather than data infrastructure.

**For users, this means:**

* Personalized earning suggestions based on actual holdings.
* Yield discovery without leaving the wallet.
* Multi-chain opportunities in one place.
* Real-time data from verified onchain sources.

***

Ready to add DeFi yield discovery to your wallet or app? [Get API access](https://portal.vaults.fyi/signup) to explore the market data and portfolio endpoints Kraken uses.