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Zerobox
Sandbox AI agents with file, network, and credential control
Zerobox is a lightweight, cross-platform process sandboxing powered by OpenAI Codex's sandbox runtime. Single binary, no Docker, no VMs with ~10ms overhead. Zerobox offers deny by default security policy, credential injection, file access control and network filtering which lets you allow or deny outbound traffic by domain. Zerobox also offers SDKs for Rust, TypeScript, and Python with a consistent API across languages.
I'm excited to introduce Zerobox, a cross-platform, single binary process sandboxing CLI written in Rust. It uses the sandboxing crates from the OpenAI Codex repo and adds additional functionalities like secret injection, SDK, etc.
Zerobox follows the same sandboxing policy as Deno which is deny by default. The only operation that the command can run is reading files, all writes and network I/O are blocked by default. No VMs, no Docker, no remote servers.
## How it works:
Zerobox wraps any commands/programs, runs an MITM proxy and uses the native sandboxing solutions on each operating system (e.g BubbleWrap on Linux) to run the given process in a sandbox. The MITM proxy has two jobs: blocking network calls and injecting credentials at the network level.
Think of it this way, I want to inject "Bearer OPENAI_API_KEY" but I don't want my sandboxed command to know about it, Zerobox does that by replacing "OPENAI_API_KEY" with a placeholder, then replaces it when the actual outbound network call is made.
Zerobox is different than other sandboxing solutions in the sense that it would allow you to easily sandbox any commands locally and it works the same on all platforms. I've been exploring different sandboxing solutions, including Firecracker VMs locally, and this is the closest I was able to get when it comes to sandboxing commands locally.
I'd love to hear your feedback, especially if you are running AI Agents (e.g. OpenClaw), MCPs, AI Tools locally.
About Zerobox on Product Hunt
“Sandbox AI agents with file, network, and credential control”
Zerobox was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #117 on the daily leaderboard. Zerobox is a lightweight, cross-platform process sandboxing powered by OpenAI Codex's sandbox runtime. Single binary, no Docker, no VMs with ~10ms overhead. Zerobox offers deny by default security policy, credential injection, file access control and network filtering which lets you allow or deny outbound traffic by domain. Zerobox also offers SDKs for Rust, TypeScript, and Python with a consistent API across languages.
On the analytics side, Zerobox competes within Open Source, Artificial Intelligence, GitHub and Security — topics that collectively have 581k followers on Product Hunt. The dashboard above tracks how Zerobox performed against the three products that launched closest to it on the same day.
Who hunted Zerobox?
Zerobox was hunted by Afshin Mehrabani. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Zerobox including community comment highlights and product details, visit the product overview.
Afshin Mehrabani