If you have been trading perpetual contracts on Hyperliquid, you might assume the fees you are paying are simply the platform standard trading fees. But a closer look at on-chain data reveals a startling truth: your wallet may be silently adding its own fees on top and in some cases, these hidden charges can be up to 10 times higher than Hyperliquid native fees.
This issue was recently highlighted by @Yishi, an intern at OneKey, who built an open-source tool called HypeFees to expose exactly how much traders are overpaying and how to fix it.
What Are Builder Fees on Hyperliquid?
Hyperliquid native trading fees are transparent and well-documented. They depend on your trading volume tier and the amount of HYPE tokens you have staked. So far, so good.
However, many traders do not access Hyperliquid directly. Instead, they use third-party wallet frontends like MetaMask, Rabby, Phantom, Axiom, and OneKey that offer built-in Hyperliquid perpetual contract trading. What most users do not realize is that these wallets add their own surcharge called a Builder Fee on top of Hyperliquid base fees.
The Builder Fee does not appear as a separate line item. It is quietly bundled into the total fee you see on each trade, making it virtually invisible unless you dig into on-chain data.
A Real-World Example: ,700 in Hidden Fees
Consider this wallet address as a case study: 0x14293ca18706f7e8bb6d84b803337eb517bc88b9. Over a recent trading period, this account paid a total of ,500 in trading fees on Hyperliquid perpetual contracts.
Here is the breakdown:
- ,800 went to Hyperliquid (the actual platform fee)
- ,700 went to the wallet Builder Fee (in this case, MetaMask)
That means 71.8% of all fees paid were Builder Fees money that went entirely to the wallet provider, not to Hyperliquid. This is money that could have been completely avoided by simply switching to a different frontend.
Builder Fee Comparison: From 0% to 0.10%
After researching over a dozen wallet frontends that support Hyperliquid trading, the Builder Fee rates vary dramatically:
| Wallet Frontend | Builder Fee Rate |
|---|---|
| OneKey | 0% (Free) |
| Axiom | 0.01% |
| Rabby | 0.02% |
| Phantom | 0.05% |
| MetaMask | 0.10% |
The Real Cost: How Much Are You Overpaying?
- Monthly trading volume: ,000,000
- Builder Fee at 0.10% (MetaMask): ,000/month = ,000/year
- Builder Fee at 0.02% (Rabby): ,000/month = ,000/year
- Builder Fee at 0% (OneKey): /bin/zsh/year
That is a potential ,000 per year in savings just by switching your wallet frontend.
Introducing HypeFees: Check and Switch in One Click
HypeFees is a free, open-source tool that does two things:
- Fee Comparison Table: Lists all wallet frontends with their current Builder Fee rates in real-time.
- One-Click Switch: Switch to a free or cheaper frontend directly without changing apps or migrating assets.
The tool is completely open-source on GitHub under the MIT license.
Why This Matters for DeFi
As more wallet providers integrate Hyperliquid, the Builder Fee landscape will become more complex. Without transparency tools like HypeFees, traders have no easy way to compare costs. This raises broader questions about fee transparency in DeFi.
How to Check Your Own Fees
- Visit hypefees.com
- Enter your ETH wallet address
- See a complete breakdown of your fees vs. Builder Fees
- Use the one-click switch to move to a cheaper frontend
FAQ
What is a Builder Fee on Hyperliquid?
A Builder Fee is an additional charge that third-party wallet frontends add on top of Hyperliquid native trading fees. It goes to the wallet provider and is bundled into the total fee without being separately displayed.
How much can I save by switching wallets?
Depending on your trading volume, savings can range from hundreds to tens of thousands of dollars per year.
Is HypeFees safe to use?
Yes. Fully open-source under the MIT license. The one-click switch only changes your frontend routing.
Do all wallets charge Builder Fees?
No. Some wallets like OneKey offer 0%. Check HypeFees.com for the latest comparison.
Source: @Yishi on X
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