Stablecoin Issuer · Review
InactiveMountain Protocol Review 2026: USDM Wind Down Explained
Mountain Protocol issued USDM, a rebasing stablecoin backed by short-term US Treasuries. The project is winding down, so this is mainly a record of what it was and what remaining holders face.
By the DappsAtlas editorial team · Updated
DappsAtlas score
4.5/10
Weak
Our verdict on Mountain Protocol
4.5/10Mountain Protocol is mainly relevant now to existing USDM holders. It built a Treasury-backed, rebasing stablecoin with a clear reserve structure, an OpenZeppelin audit and Fireblocks custody. The main caveat is the wind down: the primary market was due to close on Aug 22, 2025, the homepage shows 0.00% APY, and redemption moves to secondary markets. New users should not treat it as an active yield product.
Score breakdown
How Mountain Protocol scores
- Security
- 6.5/10
- Ease of use
- 4.5/10
- Fees
- n/a
- Features
- 5.0/10
Scores run from 0 to 10 and are based only on facts we could verify. Where information was missing we mark the score n/a rather than guess.
What is Mountain Protocol?
Mountain Protocol was the issuer of USDM, a yield-bearing stablecoin backed by short-term US Treasuries. It marketed itself as the first permissionless regulated yield-bearing stablecoin and listed on DefiLlama in October 2023 under the RWA category.
The homepage now says USDM is in an orderly wind down. Phase 2 was set to conclude on Aug 22, 2025, after which the primary market closes and remaining holders must redeem via secondary markets. The site also shows 0.00% APY. DefiLlama shows about 1.39 million USD in TVL.
This review is research-based and treats Mountain Protocol as winding down. It is useful mainly for existing holders and for readers comparing tokenized Treasury stablecoins.
How Mountain Protocol works
USDM was a fiat-backed-style stablecoin whose reserves were short-term US Treasuries. Approved primary users, who had to be incorporated businesses in supported countries, could mint and redeem it at 1 USD directly with Mountain Protocol. Everyone else could buy it from other holders or on decentralized exchanges.
Instead of paying yield as a separate token, USDM rebased daily. A reward multiplier changed the balanceOf figure, so a wallet's token count increased over time wherever the tokens were held. This is different from a token whose price rises.
Now that the project is winding down, the primary market is scheduled to close and redemption moves to secondary markets. That means the price depends on market liquidity rather than direct redemption at 1 USD.
5 features
Key features
01
Daily rebasing yield
USDM rebased daily through a reward multiplier, so token balances grew without staking or claiming.
02
Treasury-bill reserves
Reserves were described as exclusively short-term US Treasuries, minimizing bank deposits and other stablecoins to reduce counterparty risk.
03
Permissionless ERC20
USDM is a standard ERC20 token, compatible with any smart contract that supports that standard.
04
Bankruptcy-remote structure
Reserves sat in segregated, bankruptcy-remote accounts, with proof of reserves and third-party attestations.
05
Multi-chain issuance
DefiLlama lists Ethereum, zkSync Era, Arbitrum, Optimism, Base and Polygon, and the homepage also names Celo and Avalanche.
Pros and cons
What we like
- Reserves were described as exclusively short-term US Treasuries, which are low risk by design.
- Segregated, bankruptcy-remote reserve accounts, with proof of reserves and third-party attestations.
- Smart contract audit by OpenZeppelin and Fireblocks MPC custody are cited.
- Standard ERC20 token that worked with other DeFi protocols across several chains.
- The wind down was announced openly on the homepage with dates and instructions.
Watch out for
- Winding down: the primary market for USDM was scheduled to close on Aug 22, 2025, leaving only secondary-market redemption.
- Primary minting and redemption were limited to incorporated businesses in supported countries, not individuals.
- Access is blocked for people and businesses in the US and a long list of other jurisdictions.
- TVL is small (about 1.39 million USD per DefiLlama), which suggests a shrinking user base.
- Holders who miss the primary redemption window depend on secondary-market liquidity and may not get exactly 1 USD.
- The homepage shows 0.00% APY, so the yield that was the main selling point is no longer being paid.
Mountain Protocol fees
Fees are not published. The homepage does not list mint, redeem or management fees. Users who still hold USDM would see costs mainly as network gas fees and any DEX trading fees on secondary markets.
The yield shown on the homepage is 0.00% APY, so there is currently no advertised return to offset costs.
Is Mountain Protocol safe?
The homepage cites an OpenZeppelin audit, Fireblocks MPC custody, bankruptcy-remote reserve accounts, proof of reserves and third-party attestations. DefiLlama lists two audits. The project does not name any specific hack or exploit.
The main risk now is the wind down. After the primary market closes, holders depend on secondary-market liquidity, and the price could drift from 1 USD. The service is also restricted in the US and many other jurisdictions, so check that you are eligible. This is not financial advice.
6 steps
How to get started with Mountain Protocol
- 1
Read the wind-down notice on the official homepage and check whether the primary market has already closed.
- 2
If you hold USDM, confirm which chain your tokens are on.
- 3
If the primary market is closed, plan redemption through a secondary market such as a decentralized exchange.
- 4
Compare the secondary-market price with 1 USD and check the pool's liquidity before trading.
- 5
Confirm that you are allowed to use the service under the stated jurisdiction restrictions.
- 6
Keep an eye on official channels for updates on the wind down.
Who Mountain Protocol is for
This page is for existing USDM holders who need to understand the wind down, and for readers studying how Treasury-backed, rebasing stablecoins were structured. It is not for anyone looking to start earning yield on a stablecoin today.
Mountain Protocol FAQs
What is USDM?
USDM was a yield-bearing, rebasing stablecoin issued by Mountain Protocol. It was backed by short-term US Treasuries and designed to hold a 1 USD value while accruing daily rewards.
Is Mountain Protocol shutting down?
According to the homepage, USDM is in an orderly wind down. Phase 2 was set to conclude on Aug 22, 2025, after which the primary market closes and remaining holders must redeem through secondary markets.
How do I redeem USDM now?
The project does not say how this works after the primary market closed. The homepage says holders must use secondary markets, so liquidity and price there become the key factors. Check the project's official announcements for current details.
How did USDM earn yield?
USDM rebased daily, increasing the token balance in a wallet through a reward multiplier on the balanceOf function. The homepage now shows 0.00% APY, so no meaningful yield is advertised.
Was USDM safe?
Its reserves were described as held exclusively in short-term US Treasuries in segregated, bankruptcy-remote accounts, with proof of reserves and third-party attestations. The homepage cites an OpenZeppelin audit and Fireblocks MPC custody. Any stablecoin still carries issuer, custody and depeg risk.
Who could use Mountain Protocol?
Not from the US, Cuba, Iran, North Korea, Russia, Syria and a long list of other listed regions, according to the homepage. Direct minting and redemption were meant for incorporated businesses in supported countries.
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How we checked
Sources
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