Uniswap Labs launched Aggregator Hooks on Oct. 22. They wrap external liquidity sources as Uniswap v4 pools. The hooks are live in the Uniswap Web App and API on Ethereum mainnet, Base and Robinhood Chain. Seven sources are available at launch, covering more than 90% of DEX activity on those chains. Swaps routed through them pay protocol fees that go toward UNI burn. Curve, Fluid and PancakeSwap are among the sources.

How the routing works

Each hook wraps an outside source so that any router sees it as a Uniswap pool. Every block, the router pulls fresh quotes from the connected sources. At swap time it builds the most efficient route across Uniswap pools and outside sources, and the whole route settles in one transaction with nothing new to approve. Web App users get the external liquidity automatically. Developers on the Uniswap API can route through the hooks on the same three chains.

Hooks are smart contracts attached to pools that customize how those pools operate. The aggregation layer appears to have been developed by Uniswap Labs, and independent third-party aggregator hooks are not mentioned in the official documentation. Uniswap says the new hooks join StablePair, VolatilePair, Permissioned Pools and LitePSM among its own hooks.

The fee argument

Founder Hayden Adams said on X that external routes would carry fees of "just a couple basis points". Uniswap Labs has not published an exact fee schedule or an estimate of how much UNI the feature could burn. Adams wrote that the Uniswap API and apps now add

"Zero margin added to native Uniswap liquidity, by far largest source of onchain liquidity".

The pushback came fast. Trader Soju replied that a fee on external liquidity works like a margin for native pools. Adams answered that the two are not equivalent. Standard aggregators take a margin on all liquidity, he wrote, while the Uniswap setup takes none on native pools and a small cut on hook pools. If Uniswap supplies about 75% of liquidity, he said, its margin averages roughly a quarter of what other aggregators earn, assuming similar fee levels.

Where the fee switch stands

The plan is not new. Aggregator hooks first appeared in the UNIfication proposal of November 2025, which asked governance to turn on protocol fees and direct them into UNI burn. The final onchain vote ran from Dec. 19 to Dec. 25. The package also included an immediate burn of 100 million UNI from the treasury.

DefiLlama's Uniswap page says the v4 fee switch was enabled on July 27, 2026. Over the past 30 days Uniswap generated $103.58 million in fees, of which $8.39 million was protocol revenue. Those figures cover the whole protocol, not the new hooks, which are one day old.

UNI is trading at $7.21 on Oct. 23, according to CoinGecko data. That is far below the all-time high of $44.92, and the market capitalization is about $4.5 billion.

What Uniswap has not said

Uniswap's launch post says Uniswap is the largest decentralized exchange by volume, with more than $4.5 trillion swapped. It argues that new liquidity can still form elsewhere, and that the hooks bring it in. The company also says more chains and sources are coming soon. It has not named any of them or given dates.

Midterm Prediction Markets: Senate, House and Texas Odds | HODL FM NEWS
Midterm betting has passed $220 million, more than double 2024. See Senate, House and Texas odds from Kalshi and Polymarket, plus public opinion.
hodl-post-imageHODL FM News: The Wildest Ride in the Crypto MarketTanya Petrusenko
hodl-post-image

Disclaimer: All materials on this site are for informational purposes only. None of the material should be interpreted as investment advice. Cryptocurrency investments involve significant risk of loss. Please note that, despite the nature of much of the material created and hosted on this website, HODL FM operates as a media and informational platform, not a provider of financial advisory services. The opinions of authors and other contributors are their own and should not be taken as financial advice. If you require advice, HODL FM strongly recommends contacting a qualified industry professional.