One call. Three lenders. The cheapest borrow, ranked.
1inch ranks DEX swaps. There is no equivalent for credit. Yieldbase compares Aave V3, Spark, and Compound V3 in a single API call — borrow APR, max LTV, liquidation threshold, feasibility — and ships a deeplink to execute on the winning protocol.
Why this matters
Rates diverge daily
Aave borrow USDC at 6.4% while Spark sits at 4.1% is common when utilization shifts. Manual side-by-side comparison wastes the operator's most expensive hour.
Direct on-chain reads
We call each pool's getReserveData / getBorrowRate directly. No indexer lag, no oracle desync, no third-party dependency.
Built for integration
Pay-per-quote at $0.10 fits agent-driven flows. $19/mo subscription fits dashboards. RapidAPI metering handles the billing.
Pricing
Pay-as-you-go
For occasional users and agent-driven flows.
- Stripe metered billing
- Same data as paid tiers
- No minimum commitment
Subscription
For dashboards, treasury teams, and automation builders.
- 5,000 quotes/mo
- Best-rate change notifications
- Multi-protocol diff history
- Priority support
RapidAPI
Use via RapidAPI quota tiers.
- Same endpoint, marketplace billing
- Sample SDKs auto-generated
- OpenAPI 3 spec
Sample call
curl "https://loan-quotes.yieldbase.example/quotes?collateral=WETH&borrow=USDC&collateralAmount=10&borrowAmount=10000" \ -H "x-api-key: $QUOTES_API_KEY"
FAQ
Which chains?
Ethereum mainnet in v0.1. Base, Arbitrum, Optimism, Polygon coming next.
What about Morpho Blue?
Different model (per-market params), needs an oracle lookup per market. On the roadmap.
Do you execute the loan?
No — we return the deeplink. Execution stays on the protocol UI where the user signs.