# Cask Data (CDAP)

> Cask Data was the developer-tools company (originally Continuuity) behind CDAP, the Cask Data Application Platform — a 100% open source (Apache 2.0) framework for building batch and real-time data-analytics applications and self-service ETL/ELT data pipelines. Google acquired Cask Data in 2018; CDAP now powers Google Cloud Data Fusion while continuing as an open source project (github.com/cdapio) with a versioned HTTP RESTful API rooted at /v3/namespaces, a Java client library and CLI, and a downloadable local Sandbox.

## Product
- [CDAP homepage](https://cdap.io): Open source data-analytics application and pipeline framework.
- [Get started / Sandbox](https://cdap.io/get-started/): Download the local Sandbox (zip, Docker `caskdata/cdap-sandbox`, or VM).
- [Google Cloud Data Fusion](https://cloud.google.com/data-fusion): Managed, cloud-native CDAP.

## Docs
- [Documentation (Confluence wiki)](https://cdap.atlassian.net/wiki/spaces/DOCS/overview): Full CDAP reference and admin manuals.
- [HTTP RESTful API reference](https://docs.cdap.io/cdap/current/en/reference-manual/http-restful-api/index.html): The v3 REST API (lifecycle, metadata, datasets, query, metrics, preferences).
- [CLI reference](https://docs.cdap.io/cdap/current/en/reference-manual/cli/index.html): First-party command-line interface.
- [Security / admin](https://docs.cdap.io/cdap/current/en/admin-manual/security/index.html): Perimeter security and access tokens.

## Code & packages
- [GitHub organization](https://github.com/cdapio): CDAP source and related projects.
- [cdapio/cdap](https://github.com/cdapio/cdap): Core platform (Apache 2.0, latest release 6.11.1).
- [Releases](https://github.com/cdapio/cdap/releases): Dated GitHub releases.
- [cdap-client on Maven Central](https://repo1.maven.org/maven2/io/cdap/cdap/cdap-client/): Java client SDK (`io.cdap.cdap:cdap-client`).
- [cdap-cli on Maven Central](https://repo1.maven.org/maven2/io/cdap/cdap/cdap-cli/): CLI (`io.cdap.cdap:cdap-cli`).
- [cdap-authentication-client](https://repo1.maven.org/maven2/io/cdap/cdap/cdap-authentication-client/): Access-token client.

## Community & security
- [Blog (Medium)](https://medium.com/cdapio): CDAP engineering blog.
- [Mailing list](https://groups.google.com/g/cdap-dev): Community discussion (cdap-dev@googlegroups.com).
- [Security policy](https://github.com/cdapio/cdap/blob/develop/SECURITY.md): Report vulnerabilities via g.co/vulnz (Google Security Team).

## API Evangelist artifacts
- packages/cask-data-packages.yml — first-party Maven client libraries
- cli/cask-data-cli.yml — CDAP CLI command surface
- sandbox/cask-data-sandbox.yml — local Sandbox distributions and endpoints
- authentication/cask-data-authentication.yml — bearer-token auth profile
- conventions/cask-data-conventions.yml — REST conventions (v3, pagination, errors)
- data-model/cask-data-data-model.yml — namespace/app/program/dataset entity graph
- errors/cask-data-problem-types.yml — HTTP status error catalog
- lifecycle/cask-data-lifecycle.yml — versioning and release cadence
- changelog/cask-data-changelog.yml — recent releases
- conformance/cask-data-conformance.yml — standards conformance
- security/cask-data-vulnerability-disclosure.yml — disclosure via g.co/vulnz
- security/cask-data-domain-security.yml — TLS/DNS posture probe
- mcp/cask-data-mcp.yml — candidate MCP tool list derived from the REST API