pydantic/mcp-run-python

Dockerise the MCP Run Python server

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#21 opened on May 27, 2025

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good first issue

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Description

Description

Hey there!

I've read through the following sources relating to the new MCP Run Python server:

  1. https://github.com/pydantic/pydantic-ai/blob/8f83407d870475dfc1885fa5119024dc2ffb44ab/mcp-run-python/README.md
  2. https://ai.pydantic.dev/mcp/run-python/

However, when trying to add this as an MCP server using the following configuration:

{
  "mcpServers": {
    "python-sandbox": {
      "command": "deno",
      "args": [
        "run",
        "-N",
        "-R=node_modules",
        "-W=node_modules --node-modules-dir=auto jsr:@pydantic/mcp-run-python stdio"
      ]
    }
  }
}

I get an MCP error -32000: Connection closed. Whilst this is its own separate issue - as I've experienced this with other MCP servers - I was able to work around it by using dockerised servers.

So, maybe it's worth also dockerising MCP Run Python?

Thank you!

References

No response

Contributor guide

Research direction
Create a Dockerfile based on the official Python image that sets up the MCP Run Python server and exposes the necessary port. Consider using a multi stage build to optimize image size.
Tech stack
pythondocker
Domain
backenddevops
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Docker
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65