> ## 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.

# Polygon CDK: private blockchains with public liquidity

> Polygon CDK lets institutions launch their own private blockchain with built-in Agglayer connectivity. Privacy as a spectrum (private validium, gated access, sovereign), 20,000+ TPS, and a bespoke chain operated with Polygon.

<Frame>
  <img src="https://mintcdn.com/polygon-labs/neKXk5towK-oBDip/img/cdk/agglayer-enterprisecdk.png?fit=max&auto=format&n=neKXk5towK-oBDip&q=85&s=6689da7aa8635044883476b2bffb071a" alt="Polygon CDK" width="2400" height="1260" data-path="img/cdk/agglayer-enterprisecdk.png" />
</Frame>

**Build private blockchains. Connect to public liquidity.**

For institutions that need dedicated, private blockspace but also connection to broad crypto liquidity, Polygon Chain Development Kit (CDK) provides a composable, privacy-on-a-spectrum selection of features for financial institutions: custom throughput, compliance controls, and Agglayer connectivity bundled in. Work with Polygon to design and launch a bespoke chain; CDK is the product, not a self-serve kit.

Every CDK chain is part of the wider Open Money Stack: bundled with non-custodial wallets, on- and off-ramps, stablecoin orchestration, and cross-chain interoperability, so your chain has access to the same payments infrastructure as Polygon Chain from day one.

## Key capabilities

<CardGroup cols={2}>
  <Card title="Privacy as a spectrum" icon="shield">
    Configure private validium, gated access, or fully sovereign blockspace. Privacy controls that institutions need without isolating from the broader ecosystem.
  </Card>

  <Card title="Connected via Agglayer" icon="arrow-right-arrow-left">
    Every CDK chain ships with Agglayer connectivity, the secure cross-chain bridge that connects the liquidity and users of heterogeneous blockchains in a single interoperability protocol.
  </Card>

  <Card title="High performance" icon="bolt">
    20,000+ TPS when tuned for payment workloads. 100+ Mgas/s capacity and managed uptime, with lower operational complexity than self-hosted alternatives.
  </Card>

  <Card title="Granular network control" icon="sliders">
    API keys and access control lists let you filter read/write permissions and specific contract or RPC method calls. Deploy fully private or selectively gated.
  </Card>
</CardGroup>

## Operating modes

| Mode                 | Description                                                                                                                                               |
| -------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Sovereign**        | Agglayer connectivity secured by pessimistic proofs. No prover required. Default configuration.                                                           |
| **Validium**         | ZK-secured execution with offchain data availability. Available today via OP Succinct AltDA; see [Privacy Configuration](/chain-development/cdk/privacy). |
| **Private validium** | Validium configuration tuned for institutional privacy requirements.                                                                                      |

## Get started

<CardGroup cols={2}>
  <Card title="Start with CDK docs" icon="book" href="/chain-development/cdk/get-started/overview">
    Review the architecture, execution stacks, and rollup modes before planning a deployment.
  </Card>

  <Card title="Request managed CDK deployment" icon="envelope" href="https://info.polygon.technology/get-early-access?utm_source=docs&utm_medium=card&utm_campaign=oms_access">
    Contact Polygon about a dedicated enterprise chain and managed deployment support.
  </Card>
</CardGroup>

## Resources

<CardGroup cols={2}>
  <Card title="What is CDK?" icon="book" href="/chain-development/cdk/get-started/overview">
    Architecture, execution stacks, and technical capabilities.
  </Card>

  <Card title="Why choose CDK?" icon="star" href="/chain-development/cdk/get-started/benefits">
    Key benefits and why enterprises choose CDK over alternatives.
  </Card>

  <Card title="FAQs" icon="circle-question" href="/chain-development/cdk/additional-resources/faqs">
    Frequently asked questions from developers and infrastructure providers.
  </Card>

  <Card title="Product page" icon="arrow-up-right-from-square" href="https://www.agglayer.dev/cdk-enterprise">
    Polygon CDK product overview on agglayer.dev.
  </Card>
</CardGroup>