Uniswap Labs has launched aggregator hooks on Ethereum, Base and Robinhood Chain, letting Uniswap v4 route trades through liquidity held on outside platforms. Trades that use those external sources will pay protocol fees that contribute to UNI token burns.
Uniswap Labs launched aggregator hooks on Ethereum, Base and Robinhood Chain, allowing Uniswap v4 to route trades through liquidity held on external platforms. The company said Thursday that Fluid, Curve and PancakeSwap are among the external sources available at launch.
The hooks run through the Uniswap web app and API, with support for more blockchains planned. The first aggregator hook went live in March 2026 on Tempo, a payments-focused blockchain developed by Stripe and Paradigm. A Uniswap Labs spokesperson told The Block that Tempo works only through the web app, while Ethereum, Base and Robinhood Chain work through both the app and the API.
How aggregator hooks work
Hooks are a feature of Uniswap v4 that let developers add custom rules and functions to liquidity pools. Aggregator hooks make liquidity on other platforms look like a Uniswap v4 pool. Uniswap then compares prices across its own pools and other platforms and completes the trade in one transaction.
Users who swap through the web app get the external sources automatically. Developers who use the API can also route trades through the hooks.
Protocol fees and UNI token burns
Trades routed through external liquidity sources will pay Uniswap protocol fees, according to Uniswap Labs. Those fees will contribute to UNI token burns.
Uniswap first described the plan in its UNIfication proposal in November 2025, when the company framed the update as turning v4 into an aggregator. Uniswap Labs said the protocol has processed more than $4.5 trillion in total trading volume. It added that most onchain liquidity is already available on Uniswap, but liquidity can still form elsewhere, and the hooks are designed to bring those sources into v4.
Source: The Block
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