Endur.Fi Staked BTC
XTBTC
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XTBTC (Endur.Fi Staked BTC) is a Bitcoin liquid staking token for tBTC deployed on Starknet by Endur.fi. The protocol maintains active development with live mainnet products, documented upgrades, and a clean operational security history since late 2024 with recurring audits by Cairo Security Clan. However, the project faces severe adoption and structural constraints: liquidity is negligible, 24-hour trading volume is near zero, community governance is absent, and the founding team remains anonymous. Furthermore, it inherits underlying custodial and bridge risks from tBTC. No qualifying red-flag events or fraudulent activities were detected.
Development Activity
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Tokenomics
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Market & Use Case
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Team & Governance
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Security & Audits
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About Endur.Fi Staked BTC (XTBTC)
XTBTC (Endur.Fi Staked BTC, also referred to as xtBTC) is a Bitcoin liquid staking token issued on the Starknet network by Endur.fi. Launched in October 2025, the token functions as a yield-bearing liquid staking receipt minted when users deposit tBTC into the protocol. As part of Endur.fi's xyBTC product line, xtBTC operates on a constant-share, appreciating exchange-rate model where the token's value relative to tBTC increases as staking rewards accumulate.
The token serves as a financial primitive within the Starknet ecosystem, designed for integration into decentralized finance applications. It functions as collateral and a liquidity asset across platforms such as Vesu, Nostra, and the Ekubo decentralized exchange. Operating under a standard mint-and-burn mechanism, xtBTC has no fixed maximum supply and reflects user deposits and redemptions directly through protocol contracts.
While the protocol has no recorded history of hacks, smart contract exploits, or depegging events, several operational and market risks exist. The project was developed by STRKFarm and Karnot Labs with support from the Starknet Foundation, but the development team remains largely pseudonymous, and the protocol lacks a decentralized autonomous organization (DAO) or on-chain governance mechanisms. Security audits have been conducted across protocol upgrades by Cairo Security Clan. Additionally, xtBTC experiences constrained market liquidity with near-zero daily trading volume, and tokenholders remain exposed to the underlying custodial and bridge risks associated with the tBTC asset.