Runtm

Runtm

[](https://www.gnu.org/licenses/agpl-3.0) [](https://opensource.org/licenses/Apache-2.0) [](https://opensource.org/licenses/MIT) [](https://discord.com/invite/JUuCkUKc)

Open-source sandboxes where coding agents build and deploy.

Spin up isolated environments where Claude Code, Cursor, Codex, and other agents code and ship software. With live URLs, logs, and previews.

**[Website](https://runtm.com)** · **[Docs](https://docs.runtm.com)** · **[Get Started](https://app.runtm.com)**

Demo

https://github.com/user-attachments/assets/8d6d5ab8-a5c4-4a3d-8ef1-5d20b67ed3ee

Why Runtm?

• Sandboxes for yolo agents – Let agents code with full permissions in isolated environments. No risk to your machine or cloud.
• Run any coding agent – Claude Code, Cursor, Codex, Gemini CLI, and more. Bring your favorite.
• Real URLs instantly – Agents deploy to live HTTPS endpoints. Test, share, and iterate.
• Logs and observability – See what your agent built, debug issues, fix and redeploy.

Quick Start

# Install
uv tool install runtm

# Start a local sandbox session
runtm session start

# Your agent builds inside the sandbox...

# Deploy to a live URL
runtm session deploy

You get a live HTTPS endpoint on auto-stopping infrastructure. Machines spin down when idle and wake up on traffic.

Local Sandbox Sessions

Run AI agents in isolated local environments with OS-level sandboxing:

# Start a sandbox (auto-installs deps on first run)
runtm session start

# Start with a template
runtm session start --template web-app

# Use a different agent
runtm session start --agent codex

# List all sandboxes
runtm session l