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hotcell
Developer Tools
Free

hotcell

Self-hostable local sandbox SDK for AI agents running on Mac, Linux, or bare metal, featuring keyless egress and microVM or container isolation.

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Rating
0
Reviews
13
Upvotes
8 days ago
Listed
Open Source
Developer Tools
Artificial Intelligence
Sandboxing
AI Agents
Docker
Security
Tool information
Provider
Sina Meraji
Platforms
Mac
Linux
Bare Metal
Languages
TypeScript
JavaScript
Python
API Available
Yes
Added to directory
8 days ago
Last updated
about 19 hours ago
Rating
Not available
Pricing
Free

About hotcell

What the tool does and who it's for

hotcell is an open-source, self-hostable sandbox SDK and CLI inspired by Cloudflare Sandbox SDK. It enables developers and AI agents to spin up, manage, and tear down isolated execution sandboxes on Mac, Linux, or bare metal. Built with security and developer experience in mind, hotcell prevents credential leakage by using revocable per-sandbox tokens instead of injecting raw API keys, enforces hard spend caps and egress controls, and supports multiple isolation technologies like Docker, Apple VZ, and Firecracker microVMs.

Key capabilities

Self-hostable sandboxes inspired by Cloudflare Sandbox SDK that work across Mac, Linux, and bare metal environments
Multiple isolation drivers behind one interface, including Docker containers, Apple VZ microVMs on macOS, and Firecracker on Linux
Keyless egress architecture where real LLM provider API keys remain on the host daemon and sandboxes receive scoped, revocable tokens
Granular financial containment with hard USD spend caps, rate limiting, and token lifetime restrictions
Default-deny network egress policy options that route model calls exclusively through a secure gateway proxy
Unified developer interface featuring an interactive CLI, REST API, TypeScript SDK, and Python SDK

Pricing

Free — plans below

Open Source

Most popular

$0

  • Apache 2.0 licensed
  • Local sandbox management on Mac, Linux, and bare metal
  • Container and microVM isolation support
  • Keyless egress gateway and rate-limiting

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