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A Soulstack product

Status: Invite onlyDeveloper tool

Hollow CLI

Hollow CLI is a command-line and Node client for Lumen monitoring, Tasks, Notes, Cascade, the model proxy, and other public API surfaces, sharing one scoped Hollow API key.

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Available to invited Hollow accounts.

A terminal running hollow --help, showing the opening description of the Hollow command line tool and the first commands in its usage list.
Hollow CLI interface preview

Developer surface

Hollow that fits into existing workflows

  • MonitoringSend logs and metrics, manage monitors, alerts, channels, and maintenance windows.
  • Workspace automationCreate tasks, notes, boards, and Cascade runs from scripts and CI.
  • Model proxySend prompts through Anthropic or OpenAI-compatible wire formats.
  • Scoped accessUse product-scoped API keys so automation only reaches what it needs.

Put Hollow on the other side of your scripts

Install Hollow CLI on macOS or Linux with the command on projecthollow.com. It needs a Hollow account and API key, and Hollow is invite only while we open access in stages.

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More Hollow apps

Other apps in Hollow

  • Status: Early access

    VS Code extension

    Hollow Code

    Chat with Hollow and work in your local workspace from inside VS Code.

  • Status: Invite only

    Monitoring app

    Lumen

    Uptime monitors, incidents, and alerts for the services you need to trust.

  • Status: Invite only

    Workspace app

    Cascade

    Automate recurring work across Hollow with a safe, step-by-step runner, including HollowScript for real logic.