What is Box by Ascii.dev?

Box is a service that provides cheap, powerful, persistent Linux VMs for building profitable long-running agents, with features like SSH, Docker, and IPv4 per machine.

How do I deploy a Box VM?

You can deploy a Box VM with a single command, making it quick and easy to set up.

What are the key features of Box?

Key features include SSH access, Docker support, and a dedicated IPv4 address per machine, all at a low cost.

Is Box suitable for long-running agents?

Yes, Box is designed specifically for persistent, long-running agents that require reliability and performance.

Can I use Box for development or production?

Box is ideal for both development and production, offering robust Linux VMs that can handle various workloads.

How does Box compare to other VM providers?

Box focuses on affordability, ease of use with one-command deployment, and essential features like Docker and IPv4, making it a cost-effective choice for agent-based applications.

Box - AI Programming Assistant tools - Free trial, pricing intro, performance review, official site access and online experience

What is Box?

Box by Ascii.dev is a persistent Linux (Ubuntu) virtual machine service designed for AI agents, programmatic use, and humans. Each box includes SSH and SCP access, Docker support, a dedicated IPv4 address, a 60fps virtual desktop, and fast disk-level forking from a snapshot. It is marketed as the cheapest and most powerful sandbox for building profitable long-running agents, deployable with a single command via CLI or API. The service is built for agent factories, supporting tools like Claude Code, Codex, or OpenCode.

Application scenarios

AI agent development
Run long-running agents (e.g., Claude Code, Codex, OpenCode) in a persistent, full Linux environment.
Programmatic automation
Use the HTTP API or Python/TypeScript SDKs to spin up, manage, and fork boxes for automated workflows.
Remote development
Access a full Ubuntu machine with pre-installed devtools (Docker, VS Code, Chrome, GitHub CLI, Rust, Node.js, Bun) via SSH or virtual desktop.
CI/CD and testing
Fork boxes from snapshots to create identical environments for testing or deployment pipelines.
Data processing
Run compute-intensive tasks on dedicated 4 vCPU / 8 GB VMs with persistent storage and IPv4 networking.
Multi-agent systems
Scale from 100 to 1,200 active boxes per account for running multiple agents simultaneously.

Core Features

Persistent Linux VMs
Each box is a full Ubuntu machine with SSH, SCP, and a dedicated IPv4 address, ensuring stable long-running sessions.
Pre-installed devtools
Docker, VS Code, Chrome, Ghostty, GitHub CLI, Rust, Node.js, and Bun come ready out of the box.
60fps virtual desktop
Access a graphical desktop environment at 60 frames per second for visual tasks or debugging.
Fast disk-level forking
Clone boxes instantly from a snapshot using the `box fork` command, enabling rapid environment duplication.
CLI and API control
Manage boxes with simple commands (`box new`, `box ssh`, `box stop`, `box desktop`, etc.) or via HTTP API and SDKs (Python, TypeScript).
JSONL output
The CLI supports `--json` on any command for stable JSONL output, ideal for shell integration with agents.
Billing by the second
Pay only for running boxes, with a $20 monthly minimum; stop boxes to snapshot and pause billing.
Customizable TTL
Default box time-to-live is 1 hour, overrideable for longer sessions.

Target users

Box is built for AI developers, agent builders, and teams running programmatic workflows. It suits engineers who need cheap, persistent Linux environments for long-running agents, automation, or remote development. The service also appeals to startups and small teams scaling from 100 to 1,200 active boxes, especially those already using agent frameworks like Claude Code, Codex, or OpenCode.

How to use Box?

Install the Box CLI on macOS, Linux, or Windows using the provided one-liner commands (curl for macOS/Linux, irm for Windows). After installation, use CLI commands like box new to spin up a box, box ssh for SSH access, box stop to snapshot and pause billing, or box desktop for the virtual desktop. For programmatic use, prefer the HTTP API or Python/TypeScript SDKs. The official docs at https://docs.ascii.dev/ provide clean markdown guides and an llms.txt index for easy navigation.

Pricing and free trial

Pricing is simple and honest: pay only for the boxes you run, billed by the second, with a $20 minimum per month. $20 buys 2,000,000 VM-seconds (about 555 hours) of dedicated 4 vCPU / 8 GB VM-time, spread across one box or many. The site claims Box is the most affordable option compared with E2B, GitHub Codespaces, Daytona, Modal, Vercel Sandbox, and others. No free trial is mentioned.

Effect review

Box delivers on its promise of cheap, powerful, persistent Linux VMs for agents, with a clear focus on developer efficiency and cost control. The pre-installed devtools, dedicated IPv4, and 60fps desktop make it a practical choice for running AI agents or automated workflows without setup friction. The per-second billing with a $20 minimum is straightforward, though the lack of a free trial may deter casual testing. For teams already using agent frameworks, Box offers a no-nonsense infrastructure layer that scales from a single box to hundreds, backed by clean documentation and API-first design.

Box