> ## Documentation Index
> Fetch the complete documentation index at: https://docs.polygon.technology/llms.txt
> Use this file to discover all available pages before exploring further.

# Agglayer: secure cross-chain bridge for heterogeneous blockchains

> Agglayer is a secure cross-chain bridge that connects the liquidity and users of heterogeneous blockchains in a single interoperability protocol. Pessimistic proofs, unified liquidity, atomic cross-chain operations. Bundled with Polygon CDK.

## Overview

Agglayer is a secure cross-chain bridge that connects the liquidity and users of heterogeneous blockchains in a single interoperability protocol so assets can move between them. It provides the secure foundation that the Open Money Stack uses for cross-chain payments.

Agglayer is bundled with Polygon CDK: every CDK chain ships with Agglayer connectivity by default. Other chains can also integrate independently, and the network is no longer EVM-only: Miden joined as a non-EVM connected chain.

**What Agglayer provides:**

* **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**: Connected chains keep their own architecture and governance. Agglayer adds interoperability without requiring changes to how a chain operates.

## Explore Agglayer

> **[Core Concepts](https://docs.polygon.technology/interoperability/agglayer/core-concepts/)**
>
> Understand how Agglayer works: the three security gateways, proof systems, and how chains connect to the network.

> **[Get Started](https://docs.polygon.technology/interoperability/agglayer/get-started.md)**
>
> Start building cross-chain applications on Agglayer-connected chains.

> **[Integrations](https://docs.polygon.technology/interoperability/agglayer/integrations.md)**
>
> APIs and services for integrating Agglayer bridge functionality into your applications.