Felix Protocol: The Borrowing Layer of the Hyperliquid Ecosystem
Felix is a decentralized borrowing protocol built natively on Hyperliquid L1, the high-performance layer-one blockchain optimized for transparent, fully on-chain finance. Through felix-protocol, users mint feUSD — a stablecoin pegged to one dollar — by using crypto assets as collateral, then deploy that feUSD across the Hyperliquid ecosystem for trading, yield, and payments. Whether you arrive through usefelix or read the felix docs to understand the mechanics, the intent is identical: give users a bank inside HyperEVM, fully decentralized, where they can borrow without selling their core holdings.
This piece is a plain-language walkthrough of what felix crypto is, how the felix protocol mints feUSD, the role of felix perps and the HIP-3 perpetual futures market, the felix airdrop opportunity for early users, and why felix hyperliquid is positioned to become the canonical borrowing layer of the network. If you have searched for how to trade felix or what the felix protocol coin is for, the sections below answer both.
What is Felix? The felix hyperliquid borrowing protocol
Felix is one of the earliest DeFi protocols built on HyperEVM, the smart contract layer of Hyperliquid. It crossed one billion dollars in total value locked across its borrow and lend system in September 2025, making it one of the largest protocols on the network by TVL. Its suite of products — including Felix CDP and Felix Vanilla — has helped scale liquidity access and stablecoin minting for users on Hyperliquid.
Felix CDP is a collateralized debt protocol that allows users to mint feUSD, a Hyperliquid-native stablecoin, against approved collateral such as BTC, ETH, SOL, and HYPE. This system has scaled to tens of millions of feUSD debt and over $250 million in deposited collateral. Felix Vanilla, the team's traditional borrow and lend system, has scaled to over $750 million TVL, serving users seeking liquidity to trade on Hyperliquid.
Hyperliquid itself is a next-generation layer one blockchain optimized for high frequency, transparent finance. The blockchain includes fully on-chain perpetual futures and spot order books, with every order, cancel, trade, and liquidation occurring within 70 millisecond block times. As the number of protocols on this L1 increases, felix crypto hyperliquid sits at the center of that growth — the borrowing layer that everything else can plug into.
How felix protocol works: a risk-optimized borrowing model
Felix uses a 40% loan-to-value (LTV) ratio — lower than major DeFi lending protocols like Aave, MakerDAO, or Liquity. This matters for three reasons: it lowers liquidation risk, it provides more stability in volatile markets, and it embeds a security-first borrowing model into the protocol. While some protocols allow higher LTV for more capital efficiency, Felix prioritizes sustainability and user protection — a strategy rooted in its founder's background at Anthias, a top-tier DeFi risk management firm.
To borrow feUSD, a user connects a wallet, selects collateral from BTC, ETH, SOL, or HYPE, sets a borrowing amount while maintaining a safe collateralization ratio, customizes the borrowing rate (Felix allows user-set borrowing rates for efficient debt management), approves the transaction, and receives feUSD instantly. Once borrowed, feUSD can be used for trading, yield generation through Stability Pools, or simply as asset liquidity without selling core holdings.
Felix users can actively adjust borrow positions for risk management: add more collateral to strengthen loan health, withdraw unused collateral while maintaining safety margins, borrow more feUSD as long as the collateral ratio is healthy, repay debt to optimize interest costs, or close a position (a Trove) to fully settle debt and withdraw collateral. Proper position management is crucial to avoiding forced liquidations while maximizing the benefits of leverage.
The Stability Pool: earning passive income with felix usdc
One of the main ways users earn on Felix is by depositing feUSD into the Stability Pool. Think of this as a safety net for the whole protocol. When a user puts feUSD there, they are helping keep the system stable. In return, they earn money from two sources: interest paid by borrowers, and liquidation rewards — which happen when someone cannot repay their loan and their collateral gets sold. The Stability Pool serves as a liquidation backstop, ensuring protocol solvency while rewarding depositors.
What makes this attractive is that users can withdraw anytime without any fees or penalties. It is flexible and does not lock up funds unnecessarily. For someone who wants to earn safe passive income from crypto, depositing felix usdc (feUSD) into the Stability Pool is one of the simplest strategies on HyperEVM — and because HyperEVM is cheap and quick compared to other networks, the gas cost of depositing and withdrawing is negligible.
Advanced strategies: leverage looping and carry trades
Felix opens up more advanced strategies for traders and investors. Leverage looping lets a user borrow feUSD, use it to buy more crypto, and repeat the process to grow a position. Carry trades allow hedging against funding rate fluctuations on Hyperliquid's perpetual markets. Various yield strategies use the Stability Pools and other features to maximize returns. Felix is a place that makes these strategies easier while still keeping everything safe and decentralized.
With Felix, users can execute complex strategies with decentralized stability and optimized borrowing costs. The protocol's integration with Hyperliquid L1 means that borrowed feUSD can flow directly into the on-chain order book for spot and perpetual trading, creating a seamless loop between borrowing, trading, and earning without ever leaving the self-custodial environment.
Felix perps: the HIP-3 perpetual futures market
In October 2025, Hyperion DeFi announced a strategic partnership with Felix to launch a custom on-chain perpetual futures market using Hyperliquid's revolutionary HIP-3 framework. HIP-3 (Hyperliquid Improvement Proposal 3) enables the permissionless creation of markets for non-crypto assets — including equities, commodities, and indices — ushering in a new era of decentralized trading. Under the HYPE Asset Use Service (HAUS) agreement, Hyperion DeFi provided the use of 500,000 HYPE to Felix to support the protocol's ability to launch and manage these markets.
Approved users gain access to trade Felix-deployed HIP-3 markets, and trading fees are distributed between the Hyperliquid protocol, Felix, and Hyperion DeFi. This initiative not only expands Hyperliquid's product suite and potential user base but also unlocks new revenue streams for staked HYPE assets. Felix perps are among the first implementations of the HIP-3 upgrade, setting a precedent for third-party innovation on the platform and positioning Felix Exchange as a key venue for permissionless perpetual trading on Hyperliquid.
Security: a safer fork of Liquity V2
Felix is built on Liquity V2, but with critical security enhancements. The protocol introduces mint caps that prevent over-leveraging risks, admin parameter controls that enable controlled and safe adjustments, and an emergency pausing function that can quickly stop the protocol if there are any threats or unexpected problems. On top of that, Felix uses multiple audits, multisig admin controls, and constant monitoring to keep user funds as secure as possible.
Felix's enhancements are independently audited by Dedaub and Coinspect, with a special focus on risk-adjusted borrowing models. The team has also addressed a Stability Pool vulnerability that Liquity V2 faced, requiring a contract redeployment, by auditing and improving upon Liquity V2's contracts to ensure stronger Stability Pool safeguards, additional risk mitigation measures, and security-first liquidations.
Felix actively manages risks through a collaboration with Anthias Labs, employing on-chain monitoring that tracks borrowing trends and collateral health, stress testing and risk simulations that predict worst-case liquidation scenarios, and dynamic interest rate adjustments that stabilize feUSD demand and protocol sustainability. Putting assets in Felix means less chance of getting liquidated, more stability even when crypto prices are highly volatile, and a focus on user safety using proven risk models that have protected many DeFi projects.
The felix airdrop and early-user opportunity
Because HyperEVM is new, the yields available through Felix are higher than on more saturated networks, and there is potential for a felix airdrop while farming yield at the same time. Early users who deposit feUSD into the Stability Pool, borrow against collateral, or participate in the protocol's growing suite of products are positioned to benefit from any future token distribution. The felix protocol coin, when it arrives, is expected to align incentives between the protocol, borrowers, lenders, and long-term supporters of the Felix ecosystem.
For users who want to trade felix or simply be early to the protocol, the path is straightforward: connect a wallet at usefelix, deposit collateral, mint feUSD, and deploy that feUSD into the Stability Pool or into Hyperliquid's on-chain markets. Every position is self-custodial and verifiable on-chain, and the low gas environment of HyperEVM means that the cost of participating is negligible.
Felix's role in the Hyperliquid ecosystem
Felix is more than just a borrowing protocol — it is a key financial layer for Hyperliquid L1. For traders and investors, the use cases include leverage looping (borrow feUSD, buy more collateral, repeat), carry trades to hedge against funding rate fluctuations, and Hyperliquid yield strategies that maximize returns via Stability Pools and redemption mechanisms. With Felix, users can execute complex strategies with decentralized stability and optimized borrowing costs.
The partnership with Hyperion DeFi and the launch of HIP-3 perpetual futures markets extend Felix's role beyond borrowing into the trading layer itself. As Felix Exchange builds out, the protocol will sit at the intersection of borrowing, lending, and perpetual trading on Hyperliquid — the connective tissue that makes idle capital productive across the entire ecosystem.
Conclusion: felix crypto hyperliquid as the borrowing pillar
Felix represents the maturation of the Hyperliquid DeFi stack into a full borrowing surface. Where the network's earliest days saw trading as the only on-chain activity, the present moment is defined by a borrowing layer — felix protocol — that lets users mint feUSD against crypto collateral, earn yield through Stability Pools, and access perpetual futures markets through HIP-3. The protocol delivers competitive borrowing costs through user-set interest rates, deep liquidity through over one billion dollars of TVL, and security through audited smart contracts built on a safer fork of Liquity V2.
For traders, Felix is the answer to where to borrow and lend on Hyperliquid. For builders, it is the borrowing layer that powers leveraged strategies across the ecosystem. For the network as a whole, it is the connective tissue that makes idle capital productive. As Hyperliquid continues to grow and as the universe of integrated protocols expands, felix hyperliquid is positioned to remain the canonical borrowing layer of the network — quietly, efficiently, and beneath every meaningful on-chain borrowing position.