> [!WARNING]
>
> **Preview**
>
>
> This product is
>
> subject to the "Pre-GA Offerings Terms" in the General Service Terms section of the
> [Service Specific
> Terms](https://docs.cloud.google.com/terms/service-terms#1).
>
> Pre-GA products are available "as is" and might have limited support.
>
> For more information, see the
> [launch stage descriptions](https://cloud.google.com/products/#product-launch-stages).

## Authentication

- [### Authenticate to Capacity Planner
  Learn how to authenticate to Capacity Planner
  if you are using REST.](https://docs.cloud.google.com/capacity-planner/docs/authentication)

## Capacity Planner API

- [### Client libraries
  Get started with Capacity Planner in your language of
  choice.](https://docs.cloud.google.com/capacity-planner/docs/reference/libraries)
- [### REST API reference
  Programming reference for the REST Capacity Planner API.](https://docs.cloud.google.com/capacity-planner/docs/reference/rest)
- [### MCP reference (Preview)
  Reference for the Capacity Planner MCP server tools.](https://docs.cloud.google.com/capacity-planner/docs/reference/mcp)