hileamlakB/PRIMS

Overview

PRIMS is a lightweight, open-source Model Context Protocol (MCP) server that safely executes arbitrary Python code in a secure, throw-away sandbox. It runs as a Python-based MCP server, letting LLM agents run code without persistent side effects.

Best for

Best for
Developers who need a minimal, auditable sandbox for LLMs to run Python code without risk.

Use cases

• Sandboxing AI-generated Python scripts for review
• Enabling LLMs to run calculations or data transformations safely
• Testing untrusted code snippets in a contained environment

How to use

Install

source .venv/bin/activate

Tools exposed

• run_code
• list_dir
• preview_file
• persist_artifact
• mount_file

Notes

PRIMS is a lightweight, open-source Model Context Protocol (MCP) server that safely executes arbitrary Python code in a secure, throw-away sandbox. It runs as a Python-based MCP server, letting LLM agents run code without persistent side effects.

28 stars on GitHub. Last updated 2025-10-15. Licensed MIT.

Use cases

• Sandboxing AI-generated Python scripts for review
• Enabling LLMs to run calculations or data transformations safely
• Testing untrusted code snippets in a contained environment

Pros

• Simple, single-purpose sandbox with clear security boundaries
• Open-source and easy to inspect or customize
• Integrates via standard MCP protocol

Cons

• Small community and limited real-world testing at 28 stars
• No built-in resource limits or timeout configurability mentioned
• Requires manual setup and dependency management

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.