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Hyperliquid Builder Codes: The Fee Third-Party Apps Add
Rules verified against Hyperliquid's official docs on 2026-09-15. Hyperliquid's own fees are on the fees page; this page covers the extra fee an app can charge on top.
If you trade Hyperliquid through a wallet app, a mobile front-end or a bot rather than app.hyperliquid.xyz, the operator can earn a cut of each fill. The docs call that mechanism a builder code — "builder" meaning "defi builders who build applications on Hyperliquid", not block builders — and they put the user in control of it at the protocol level.
What it is
"Builder codes allow builders to receive a fee on fills that they send on behalf of a user. They are set per-order for maximal flexibility. The user must approve a maximum builder fee for each builder, and can revoke permissions at any time. Builder codes are processed entirely onchain as part of the fee logic." Each approved order can carry a builder parameter naming the builder's address and the fee "in tenths of basis points. I.e. a value of 10 means 1 basis point".
The limits the docs set
- Caps. "Builder fees charged can be at most 0.1% on perps and 1% on spot."
- Your signature, from your main wallet. The approval "must be signed by the user's main wallet, not an agent/API wallet" — a bot key cannot grant itself a builder fee.
- Up to 10 approvals active per user at a time; each is a maximum, and the per-order fee cannot exceed it.
- Where it applies. "Builder codes do not apply to the buying side of spot trades but apply to both sides of perp trades", because they are collected in the quote or collateral asset only.
- Builder-side requirements. The builder "must have at least 100 USDC in perps account value and must use standard as the account abstraction mode"; builders claim fees "through the usual referral reward claim process".
How to see what you have approved
The approved maximum for a given user and builder is a public info query
(maxBuilderFee), and a builder's total collected fees appear in its referral state.
Fills that used a builder code are also published daily per builder address in a public data
bucket, so a builder's take is auditable after the fact. Approval is an on-chain action
(ApproveBuilderFee) that a third-party interface has to ask you to sign; without it
that interface cannot add a fee, and the docs say you "can revoke permissions at any time".
Why it matters when choosing an interface
The docs list several front-ends beside the official app — Based, Dexari, MetaMask and Phantom among them — and any of them may use a builder code. The protocol guarantees the ceiling and the consent step; it does not guarantee that an app charges nothing. Before approving, read the fee the prompt names, remember it is on top of Hyperliquid's own taker or maker fee, and compare it with the 4% referral discount you may be giving up. This site has not audited any third-party app's builder fee and does not rank interfaces.
FAQ
Can a builder fee be charged without my approval?
Not per the docs: the approval "must be signed by the user's main wallet", and the fee "is processed entirely onchain as part of the fee logic" against that approved maximum.
Does the official app charge a builder fee?
The builder-codes page describes the mechanism for third-party builders; it does not state that app.hyperliquid.xyz charges one, and this site does not assert either way.
Is the builder fee shared with Hyperliquid?
The docs describe the builder receiving the fee and claiming it through the referral process; they do not describe a protocol share of it.
Open Hyperliquid (opens in a new tab)
Referral link — 4% fee discount, disclosed on the referral page. See our methodology.