type lending), and Spark Savings, a set of ERC-4626 vaults (public type vault) anchored to the Sky Savings Rate. They have separate mechanics and separate yield IDs; check a yield’s type before assuming which one you’re looking at.
Availability
SparkLend (lending): Ethereum only. You supply a reserve asset and earn the variable rate paid by borrowers. Yield IDs follow{token}-sparklend, for example ethereum-usdc-sparklend. The position token is an sp-prefixed receipt (for example spUSDC), mechanically the same as an Aave aToken: pegged 1:1, balance grows as interest accrues.
Spark Savings (vault): ERC-4626 vaults that deposit into the Sky Savings Rate.
Query
GET /v1/yields?providers=spark for the exact set of markets and vaults enabled for your project; SparkLend and both Savings versions share the spark provider ID.
Entering
SparkLend: enter takes a requiredamount. Yield.xyz builds an approval transaction (skipped if allowance already covers the amount) followed by the supply transaction; the aToken-style receipt is minted in the same transaction.
Spark Savings: enter follows the generic ERC-4626 deposit flow, approval then deposit, minting vault shares 1:1 in value at the time of deposit.
Exiting
SparkLend: exit takes an optionalamount and a useMaxAmount flag to redeem the full balance. There is no cooldown.
Spark Savings: exit redeems vault shares for the underlying asset through the standard ERC-4626 withdraw flow. There is no cooldown.
Rewards and position
SparkLend’s publicrewardRate reflects Aave-style variable interest computed from the reserve’s on-chain utilization, distributed each block with automatic claiming.
For Savings V2 vaults, rewardRate is read from the vault’s on-chain variable savings rate (VSR) and annualized. The legacy Savings V1 sUSDC-style vaults price through the Sky Savings Rate instead: on deposit the vault swaps USDC to USDS 1:1 through the Sky Peg Stability Module and back on withdrawal, with no slippage beyond network fees. Both versions claim rewards automatically; there is no manual claim step for either.
Deposits into Spark Savings vaults also earn Spark Points, an off-chain loyalty accrual tracked by Spark rather than a Yield.xyz reward token or balance.
List the live yields
Copy this request to list the Spark yields enabled for your project. Yield IDs change as markets and networks are added, so query the API rather than hardcoding them.Next steps
Lending
Compare all supported lending protocols.
Action lifecycle
How enter and exit actions progress from creation to settlement.