> For the complete documentation index, see [llms.txt](https://docs.kairosswap.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kairosswap.com/readme.md). # The Kairos Protocol Overview of the protocol and popular use cases ## Interest Rate Swap Markets: ### The Missing DeFi Primitive That Unlocks Long-Term Fixed Rate Lending
**What Kairos is** Kairos is an onchain interest rate swap protocol. You post a fraction of collateral, take a position on a published rate (Aave borrow, sUSDe yield, and others), and at the end of a set term the protocol settles the difference between a fixed rate and the realized floating rate. You never need to hold the underlying loan or yield asset. Liquidity providers take the other side through an AMM. That single primitive does two jobs DeFi has been missing: traders can express a view on where rates go, and lenders or borrowers can hedge rate risk so longer fixed-rate credit can exist. **The Current State of DeFi** Today’s DeFi lending markets are dominated by variable, and at times volatile, rates. Whether you're borrowing from Aave, lending to Morpho, or saving in Ethena, your interest rate can move in real time with utilization and market conditions. Variable rates are fine for some strategies. They are a poor fit when someone needs to know the rate they will pay or earn for a defined period — a 90-day borrow, a 2-year loan, a multi-month carry trade. There are also few capital-efficient ways to bet on rate direction onchain. If a trader expects Ethena’s yield to rise, Aave’s borrow rate to spike, or a benchmark to fall, they usually have to hold or borrow the underlying asset and take extra price risk to express that view. **Interest Rate Swaps in Traditional Finance** In traditional finance, interest rate swaps are the layer that makes fixed-rate lending and rate trading scale. A swap is an agreement to exchange fixed and floating *payment obligations* for a set term, referenced to a rate such as SOFR. Principal does not change hands — only the net interest difference — so participants can take large notional exposure relative to the capital they post. A bank that lends at a 5-year fixed rate can buy a swap that pays them when floating rates rise, matching assets and liabilities. A trader who thinks the Fed will hike can receive floating and pay fixed. The hedge market is what lets the loan market offer duration. **Kairos** Kairos brings that market onchain as a permissionless primitive: anyone can, in the intended design, create a swap market and anyone can trade it. Each market is defined by a small set of parameters: * **Collateral token** — what buyers and LPs deposit (for example, USDC) * **Reference rate** — the floating rate the swap tracks (for example, sUSDe yield or Aave USDC borrow) * **Swap term** — how long the contract lasts (1 day, 30 days, 90 days, 2 years, and so on) * **Swap type** — whether the buyer pays fixed and receives floating, or the reverse A market might offer 3-month swaps on Ethena’s sUSDe yield, collateralized in USDC. A buyer can lock in a view on that yield without holding USDe. Because settlement is only the rate difference on a large notional, collateral can be a small slice of notional. On short-tenor, low-volatility rates that ratio can be extremely high (the protocol quotes figures up to \~5,000x). That is not free leverage: the same design means a modest move against you can consume the margin. Shorter terms generally allow higher notional per dollar of collateral. Each market uses creator-chosen oracles. Markets can therefore pick the feed they trust, and they can be created for onchain or offchain reference rates. Liquidity is pooled in an AMM. When demand is high, a utilization fee compensates curators and LPs for allocating capital to that market. **How to read a swap (the four terms that matter)** * **Notional** — the size the rate is applied to. You do not deposit this amount. * **Collateral** — what you actually post. Leverage ≈ notional ÷ collateral. * **Pay fixed / receive floating** — you profit if the realized rate finishes *above* the fixed rate you locked. Use this if you think rates will rise, or if you are hedging a fixed *asset* (you are owed a fixed rate). * **Pay floating / receive fixed** — you profit if the realized rate finishes *below* the fixed rate. Use this if you think rates will fall, or if you want to lock in a yield. At expiry, only the net difference is paid from collateral. Kairos is in beta. Trading is live; market creation is still limited to permissioned parties while we finish the rollout carefully. Permissionless market creation is the end state, not the current one. **Unlocking the Next Wave of Growth Onchain** Interest rate swap markets are not just another trading venue. They are the hedging layer that lets the rest of onchain credit grow: * **Longer fixed-rate loans:** a lender can offer multi-year fixed rates and lay the rate risk off into a swap instead of eating it * **Rate trading:** traders can take a view on Aave, Ethena, funding rates, or other feeds without buying the underlying * **Predictable financing:** a borrower can turn a variable Aave or Morpho loan into a known carrying cost for a defined term * **Deeper credit:** fixed-income products can exist because someone can hedge them Kairos does not originate the loan. The loan can still live on Aave, Morpho, or a future credit protocol. Kairos is the risk-transfer layer those products need. Without it, DeFi lending stays short-term, variable, and mostly crypto-native. With it, the stack can support duration. **Use Case 1: Capital-Efficient Bets on Rates** A trader expects **sUSDe yields to rise from 7% to 10%** over the next month. Holding USDe only earns whatever the yield turns out to be. They want amplified exposure to the *change in yield*, not more USDe price risk. They use Kairos as follows: * **View:** yields go up * **Position:** pay fixed / receive floating (profit when the realized yield is above the strike) * **Notional:** $1,000,000 — the rate difference is calculated on this size * **Term:** 30 days * **Collateral:** $5,000 (example), about 200x notional-to-margin * **Fixed rate locked:** 7% (the market swap rate at entry) * **Floating leg:** realized sUSDe yield over the 30 days What happens: * If the realized yield averages **10%**, the trader receives a 3% annualized spread on $1,000,000 for 30 days ≈ **$2,500**. That P\&L comes from the swap. It does not require them to hold USDe; if they also hold USDe, they still earn that yield separately. * If the realized yield averages **5%**, they owe a 2% annualized spread for 30 days ≈ **$1,670**, paid from collateral. They can scale notional, cut the position early if the protocol allows, or hedge with an offsetting swap. The point is the rate view, isolated from the asset. **Use Case 2: A Lender Who Wants to Offer a 2-Year Fixed Loan** Meet the lender. They want to originate a **2-year, $1,000,000 loan at 6% fixed**. Borrowers will pay that. The lender’s problem is not credit in this example — it is interest rates. Without a hedge: * **Month 1:** they fund the 6% loan. Fine. * **Month 6:** Aave USDC borrow has jumped to 12%. New floating loans earn twice what this book earns. The fixed loan is now a stale, under-yielding asset. If they needed to unwind or mark it, the loss is real. * **Month 24:** if rates stay high, they have earned \~6% while the market paid \~12% for most of the life of the loan. That is why most DeFi protocols will not lock capital at a fixed rate for years. The lender is short a rate rally with no way to get out. The lender’s motivation on Kairos is specific: **keep the 6% loan on the books, and buy a swap that pays them when Aave rates rise**, in the same size and for a similar term. They are not entering a swap for its own sake. They are buying insurance on the rate that made the loan look cheap. They do it like this: * **What they still hold:** the $1,000,000 2-year loan at 6% fixed (that loan can sit on another protocol) * **What they buy on Kairos:** pay fixed / receive floating on Aave USDC borrow * **Notional:** $1,000,000 — matched to the loan * **Term:** 2 years * **Fixed rate on the swap:** 7% (the swap market’s price today; a bit above the 6% they earn on the loan) * **Collateral:** a fraction of notional, not the full $1,000,000 Now keep the lender in the picture for both outcomes: * **Aave rises to 12%.** The loan still only pays them 6%. That is the pain they feared. The swap pays them the gap between 12% floating and the 7% they owe — about 5% annualized on $1,000,000. The swap profit offsets the opportunity cost of being stuck at 6%. They can keep offering long fixed loans instead of pulling back to overnight variable. * **Aave falls to 3%.** The 6% loan looks great versus the market. The swap loses: they pay 7% and receive \~3%. That swap loss is the premium for having been protected. Blended, they have roughly locked a mid-single-digit rate rather than a one-way bet. The 6% loan vs 7% swap strike is not a rounding error. That 1% is the visible cost of laying off rate risk (plus fees). The lender accepts it because the alternative is not making the 2-year loan at all. Once that hedge exists, the same pattern supports other fixed-cost uses — a company that wants a known borrow rate for a year, a trader who wants a known carry on a multi-month position, a builder who wants a construction-period rate. In each case Kairos is the hedge, not the loan officer. The credit still has to be originated somewhere else. What changes is that originator no longer has to also be the rate-risk warehouse. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.kairosswap.com/readme.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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