Introduction

Kairos: Arbitrum Timeboost Integration

Brought to you by Gattaca, creators of Titan Builder and Titan Relay.

Kairos is a native integration with Arbitrum Timeboost that offers a streamlined path for searchers and other participants to access express-lane blockspace—without directly engaging in each round-level Timeboost auction.

Through the Kairos API, users can submit express-lane transactions and bundles with ease, gaining prioritized access and reducing both latency and operational complexity.

Key Advantages

• Guaranteed Priority Eliminate the 200ms auction delay. Express-lane transactions are submitted ahead of standard first-come-first-serve (FCFS) traffic, ensuring consistent priority.

• Minimal Integration Overhead Leverage a familiar, well-documented RPC interface. Kairos closely mirrors standard Ethereum workflows, requiring minimal adjustments.

• Efficient Cost Model Avoid the upfront expense of reserving blockspace for 60 seconds. With Kairos, you only pay on a per-transaction basis—and only when your transaction is successfully included.

• Full Ethereum Bundle Compatibility Continue using standard builder features such as bundle atomicity, revert guarantees, cancellation support, and refund mechanisms.

---

For searchers already familiar with Ethereum builder APIs, integrating with Kairos will be a seamless experience. The system is optimized for ease of adoption, operational efficiency, and predictable performance within Arbitrum's Timeboost ecosystem.