Etherscan Cards
Bringing DeFi Yield Insights to the World’s Most Trusted Block Explorer
Etherscan is Ethereum's premier block explorer. Etherscan has leveraged the vaults.fyi API to give users more insights into yield opportunities via the Etherscan Cards integration.
The Idea: Contextual Yield Insights for User Addresses
When users explore an Ethereum address on Etherscan, they’re often looking to understand what that wallet holds and how it’s being used. But what if they could also see what those idle assets could be doing?
That’s where the vaults.fyi Market data and Transactional support come in. By surfacing real-time DeFi yield opportunities and enabling user interaction with vaults, they provide helpful, actionable context directly within the Etherscan interface.
How It Works
Here’s how the integration functions behind the scenes:
When a user views an Ethereum wallet address on Etherscan, the Insights API checks for idle balances in ETH and stablecoins (USDC, USDT, and DAI).
2. Find Relevant Yield Opportunities
Etherscan queries the Insights API to identify the top DeFi yield opportunities that match those assets, filtered by clear and trusted criteria.
3. Display Vault Details
The Yield Opportunity card is shown in the Cards tab of the wallet page (for example: vitalik.eth), highlighting:
Token type (ETH or stablecoin)
Protocol name and vault name for the top opportunity found
Estimated 7-day APY
4. Connect User to Vault
Engaged users can click the card to visit vaults.fyi, where they can explore more detailed analytics and use the app to:
Supply or withdraw funds to the protocol in 1 click
Track positions on our DeFi dashboard
Find additional yield opportunities
Search Criteria for Yield Opportunities
To ensure only higher signal opportunities are shown, the following criteria are used:
Total Value Locked (TVL) must be >$100 million
For stablecoin vaults, only return results where the underlying asset is USDC, USDT, or DAI
The vault with the highest 7-day APY found for ETH and also for stablecoins is returned.
Simple search criteria ensures that users are presented with yield options that have substantial liquidity and protocol maturity.
The Bigger Picture: API-Powered UX
Etherscan’s Cards integration is just one example of what’s possible with the vaults.fyi API:
Market data delivers real-time, structured data on yield opportunities
Personalized insights and Portfolio tracking endpoints provide data on user wallet balances and relevant yield opportunities, based upon the user's preferences.
Transactional support helps developers build frictionless DeFi interactions—allowing users to supply, withdraw, or manage funds directly within integrated apps or platforms.
Together, our API endpoints create a seamless, informed experience that empowers users to get more out of their tokens.
Build with vaults.fyi
Whether you’re building a wallet, dashboard, portfolio tracker, or DeFi application, vaults.fyi is here to help.
✅ Deliver actionable yield insights ✅ Connect users to trusted DeFi opportunities ✅ Enable onchain transactions from inside your product, with no additional smart contract risk
Ready to integrate DeFi insights into your product? Chat with us.
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