Introducing AggKit, the Standardized Path to Connect Any Chain to Agglayer

Agglayer’s mission is simple: unify all of crypto. 

Achieving unity requires an interop solution that supports different kinds of blockchain architectures. From the Agglayer’s perspective, it shouldn’t matter how you build your blocks. But the question is: How do you bring together thousands of different chains without sacrificing autonomy?

Today, we’re excited to introduce AggKit, a standardized toolkit for connecting non-CDK chains to Agglayer.

This is the first AggKit release; future versions will build on this release to add more functionalities and simplify the path for any chain to join the Agglayer ecosystem and unlock network effects while retaining sovereignty.

AggKit is part of the broader Agglayer v0.3.5 release that enhances overall Agglayer security. Because this release includes changes to the smart contracts on the Unified Bridge, it triggers a timelock to give users time to verify the source code. 

Agglayer v0.3.5 is expected live on mainnet next week.

For a deep-dive into AggKit, check out the Agglayer docs.

What is AggKit? 

At its core, AggKit includes two key components:

• AggSender: Supports non-CDK chains to safely “write” their state to Agglayer’s global state
• AggOracle: Supports non-CDK chains to safely "read" Agglayer's global state 

For a 3D model of how Agglayer settles chain states even for different blockchain architectures, check out the Agglayer visualizer.

What’s next for AggKit?

In Q4 2025 and Q1 2026, we will package AggKit into a generic EVM Aggchain, dramatically accelerating the integration process. While this won't make connections fully permissionless just yet, it will create an even faster and more standardized path for any EVM chain to become an Aggchain.