# 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.


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