Overview
Agglayer is the interoperability layer built into Polygon CDK. Every CDK chain connects to Agglayer by default — cross-chain capabilities are a native part of the infrastructure, not an add-on. When you deploy a CDK chain, Agglayer connectivity is included. Assets on your chain can move to and from other connected chains without wrapping. Operations can be atomic across multiple chains. Security is enforced through cryptographic proofs rather than trusted parties. What Agglayer provides to CDK chains:- Unified liquidity: Assets maintain their identity across connected chains. No wrapped tokens required.
- Atomic cross-chain operations: Transactions either succeed on all involved chains or fail entirely — no partial states.
- Mathematical security: Pessimistic proofs ensure a compromised chain cannot drain more than its own deposits. Damage is contained.
- Chain sovereignty: Your CDK chain keeps its own architecture and governance. Agglayer adds interoperability without requiring changes to how your chain operates.
Explore Agglayer
Core Concepts
Understand how Agglayer works: the three security gateways, proof systems, and how CDK chains connect to the network.
Learn more →Get Started
Set up a local development environment with AggSandbox and start building cross-chain applications on your CDK chain.
Learn more →Developer Tools
AggSandbox for local testing and the Agglayer SDK for building cross-chain applications in production.
Learn more →