Uniswap routes swaps through outside DEXs via v4 Aggregator Hooks
The Uniswap web app and API now pull in liquidity from seven outside sources on Ethereum, Base and Robinhood Chain. Swaps sent to those sources pay a Uniswap protocol fee.
· Effective · Verified 2026-10-31 via official announcement
Effective Oct 22, 2026: Uniswap routes swaps through outside DEXs via v4 Aggregator Hooks. Affects: Traders swapping on the Uniswap web app or through the Uniswap API on Ethereum, Base and Robinhood Chain. Source: blog.uniswap.org, verified Oct 31, 2026.
Official site: app.uniswap.org
Uniswap Labs launched Aggregator Hooks on 22 October 2026, letting Uniswap v4 route swaps through liquidity held on other exchanges. The hooks are live in the Uniswap web app and API on Ethereum mainnet, Base and Robinhood Chain, with seven sources at launch that Uniswap Labs says cover more than 90% of DEX activity on those chains.
Each hook wraps an outside liquidity source so that a router treats it as a Uniswap v4 pool. The router refreshes quotes every block, builds a route across Uniswap pools and outside sources, and settles it in one transaction with no new token approval. Uniswap's developer docs list sources including Curve, Fluid, PancakeSwap v3, Slipstream, Uniswap v2/v3 forks and Sky's LitePSM.
Web app swaps include the outside sources automatically; there is nothing to switch on. Uniswap Labs says swaps routed through outside sources pay protocol fees that go toward UNI burns. It did not publish the rate in its announcement. Uniswap founder Hayden Adams said on X there is no added margin on native Uniswap liquidity and "a couple basis points" of protocol fees on routes to outside sources.
Uniswap Labs still charges no interface fee. Traders who swap on Uniswap's own pools see no change in cost. An earlier version of the hook went live on Stripe and Paradigm's Tempo chain in March 2026, where it works only in the web app. Uniswap Labs says support for more chains is planned.
“Outside sources become v4 pools, and swaps routed through them pay protocol fees, contributing to UNI burn.”
— Uniswap Labs blog
Who this affects
Traders swapping on the Uniswap web app or through the Uniswap API on Ethereum, Base and Robinhood Chain.
Uniswap at a glance
Uniswap is an automated market maker protocol (v2, v3, v4) with a web app and self-custodial wallet built by Uniswap Labs. Since 2025-12-27 Uniswap Labs charges no interface fee; traders pay the pool's LP fee plus gas.
Full Uniswap sheet · 0% round trip
Official site: app.uniswap.org
More from the newsroom
Sources
Last checked . Fees and terms change often; the venue's own page wins if it disagrees with ours.
- Uniswap Labs - Aggregator Hooks Are Now Live (2026-10-22) — checked 2026-10-31
- Uniswap developer docs - Uniswap Labs hooks (Aggregator Hooks sources) — checked 2026-10-31
- Hayden Adams on X - fee on routes to external sources (2026-10-22) — checked 2026-10-31
- The Block - Uniswap's aggregator hooks go live on Ethereum, Base and Robinhood Chain (2026-10-22) — checked 2026-10-31
- Bankless - Uniswap v4 Is Now an Aggregator (2026-10-22) — checked 2026-10-31
About DexSheet
DexSheet is an independent fee sheet for on-chain trading. It tracks the fees, custody, backers, incidents and availability of 96 crypto trading venues, with a dated source for every number. Every newsroom entry is checked against the venue's own announcement, docs or terms before it is published. Data: fees.json (CC BY 4.0) · RSS.