Offchain Labs, in the service of the Arbitrum Foundation and the DAO, is updating the Timeboost reserve price from a static value to a dynamically calculated value, on April 27th 2026 at 3:00 pm EST, as part of our ongoing commitment to increase the security posture, resiliency, or stability of the chain, and help increase revenue for the ArbitrumDAO. The reserve price will be updated every one-minute round as a response to observed market behavior, changes in dynamics across market participants and their feedback. This change is authorized by the Constitutional AIP: "Proposal to adopt Timeboost, a new transaction ordering policy" approved on March 29 2025.
The Dynamic Reserve Price change introduces the Timeboost Reserve Pricer API (endpoint arb1-reserve-pricer.arbitrum.io). Any one will be able to access the Timeboost Reserve Pricer API to get the round and minimum bid amount. There are 2 API endpoints that can be accessed to see the reserve price for the current round and the recent 2 hour history of the reserve price.
This update reflects our continued efforts to support the sustained capture of DAO revenue.
Key points:
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The reserve price is now updated every round at the 31st second of the round
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The Dynamic Reserve Price is accessible via API to all participants
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Offchain Labs will continue to monitor market dynamics and participant strategies, and retain the flexibility to make further adjustments as conditions evolve.
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Our objective is to preserve a healthy and competitive auction environment while maintaining an appropriate balance between trading quality and DAO revenue generation.
In parallel, the Offchain Labs team continues to dedicate research resources to evaluating alternative designs that can sustainably balance an optimal trading experience for Arbitrum users with responsible DAO revenue capture. Offchain Labs will keep the DAO and broader community informed as this work progresses and welcome ongoing feedback.