Introduction

In one sentence

Open Computer Use is a self-hosted MCP server that gives any LLM a full Ubuntu sandbox — one isolated Docker container per chat session — with a live browser, an interactive terminal, code execution in bash/Python/Node/Java, and 13+ document skills. Yambr runs a managed instance you reach as an MCP tool server at https://api.yambr.com/mcp/computer_use; artifacts are served from cu.yambr.com. You bring your own model provider — Yambr doesn’t resell inference.

What you can do with it

Capability	Example prompt
Create a polished document	”Write me a 5-page technical RFC in .docx with headings, tables, and tracked changes.”
Analyse a spreadsheet	”Open this .xlsx, pivot by region, and chart monthly revenue.”
Build a landing page	”Make a one-page site for a coffee shop. Use Tailwind. Show me the live preview.”
Drive a real browser	”Log in to our staging site, click through the onboarding flow, and screenshot each step.”
Delegate to Claude Code	”Clone this repo, run the tests, and open a PR with the fix.” — the sub-agent takes over with an interactive terminal

Every file the model creates gets a public URL that you can preview inline or download.

Key differentiators

Feature	Open Computer Use	Claude.ai (Claude Code web)	open-terminal	OpenAI Operator
Self-hosted	Yes	No	Yes	No
Any LLM	Yes (OpenAI-compatible)	Claude only	Any (via Open WebUI)	GPT only
Code execution	Full Linux sandbox	Sandbox (Claude Code web)	Sandbox / bare metal	No
Live browser	CDP streaming (shared, interactive)	Screenshot-based	No	Screenshot-based
Terminal + Claude Code	ttyd + tmux + Claude Code CLI	Built-in (Claude Code web)	PTY + WebSocket	N/A
Skills system	13 built-in (auto-injected) + custom	Built-in skills + custom instructions	Open WebUI native (text-only)	N/A
Container isolation	Docker (runc), per chat	Docker (gVisor)	Shared container (OS-level users)	N/A

What’s inside the sandbox

Category	Tools
Languages	Python 3.12, Node.js 22, Java 21, Bun
Documents	LibreOffice, Pandoc, python-docx, python-pptx, openpyxl
PDF	pypdf, pdf-lib, reportlab, tabula-py, ghostscript
Images	Pillow, OpenCV, ImageMagick, sharp, librsvg
Web	Playwright (Chromium), Mermaid CLI
AI	Claude Code CLI, Playwright MCP
OCR	Tesseract (configurable languages)
Media	FFmpeg
Diagrams	Graphviz, Mermaid
Dev	TypeScript, tsx, git

Skills are model-agnostic. Write a skill once with Claude Code in the terminal and then use it with any model in the chat — the auto-injected system prompt exposes every enabled skill to every model.

Getting started

Demo course

Yambr Platform

Self-hosting

Features

Skills

Integrations

Reference

Introduction

In one sentence

What you can do with it

Key differentiators

What’s inside the sandbox

Next

Architecture

Yambr Platform

​In one sentence

​What you can do with it

​Key differentiators

​What’s inside the sandbox

​Next

Architecture

Yambr Platform

In one sentence

What you can do with it

Key differentiators

What’s inside the sandbox

Next