Isolator MCP Server

Example Use Cases

• 1

  Safely execute untrusted Python, Go, or JavaScript snippets in isolated Docker containers and capture stdout/stderr.

• 2

  Run predefined code snippets or dynamically provided entrypoint code with configurable resource limits and timeouts.

• 3

  Integrate code execution into an MCP-based workflow, returning structured execution results for downstream reasoning or formatting.

Description

This server wraps an embedded Go CLI called "isolator" to provide an MCP tool named execute_code that runs code safely inside Docker containers with configurable resource and security limits. It supports executing code supplied directly or loaded from named snippet files, and returns structured stdout/stderr results back to the MCP host. The setup is configurable via isolator_config.json and manages temporary host directories and file copying into the container. It is intended for integration with LLM-based agents to run short, sandboxed code tasks.