Build earn, borrow, and fixed-rate DeFi products with Para and vaults.fyi

Para and vaults.fyi help developers add the DeFi features that fit their product: yield across EVMs and Solana, borrowing, or fixed-rate positions.

Para provides the embedded wallets and signing experience. vaults.fyi provides the market data, portfolio data, and transactions needed to interact with the underlying DeFi protocols.

How it works

vaults.fyi provides the market data, risk context, and user position data apps need to present each product.

When a user takes an action, vaults.fyi returns an ordered actions[] array containing the unsigned transactions, including any required approvals. The app passes each action to the user's Para wallet to review, sign, and submit onchain.

vaults.fyi builds the transactions. Para wallets let users sign them.

Choose the experience that fits your app

Developers can apply that pattern across four product paths.

Earn

Connect users to one yield product or a curated set, selected from Morpho, Aave, Spark, Euler, Veda, Lido, and others across Ethereum, Base, and more than 20 other networks.

vaults.fyi provides the APY, TVL, curator, rewards, risk, and position data. Apps decide which assets, networks, providers, and products to show their users.

Borrow

Add collateralized lending through Aave and Morpho.

Users can supply collateral, borrow assets, repay debt, and withdraw collateral from the same Para-powered wallet experience. Portfolio endpoints provide the data needed to display collateral, debt, LTV, and health factor.

Fixed-rate yield

Give users access to Pendle Principal Token positions with a known yield-to-maturity.

Apps can display the current fixed rate, maturity date, and position balance, then let users enter or exit the position from their Para wallet.

Solana yield

Add Solana-native vaults alongside an existing EVM product, or build a Solana-only experience.

The integration follows the same basic flow on both ecosystems. vaults.fyi returns serialized Solana transactions instead of EVM calldata, and Para's Solana wallet signs them.

Direct interaction with the underlying protocols

Transactions generated by vaults.fyi route directly to the underlying protocol contracts.

There is no required vaults.fyi wrapper between the user and the protocol. Neither Para nor vaults.fyi takes custody of the user's assets.

Para manages wallet access and signingvia noncustodial SDKs. vaults.fyi handles discovery, transaction construction, and position data. The underlying protocol continues to hold and manage the position.

Start building

The complete Para and vaults.fyi walkthrough includes implementation examples for:

• EVM and Solana wallet signers
• Vault discovery and deposits
• Position tracking and withdrawals
• Reward claims
• Aave and Morpho lending
• Pendle fixed-rate positions
• Server-side API key handling

A Para API key and vaults.fyi API key are required to get started.