MCP Run Python (Pydantic)

Runs Python code in a sandbox (Pyodide on Deno) and returns the output. Needs Deno installed. The maker archived the repo.

📊 Data & notebooks194Updated 2026-01-30By pydanticLicense: MITAuth: NoneGitHub ↗

Found viaWebPyPI: mcp-run-python GitHubGitHub: pydantic/mcp-run-python (★ 194 on 2026-10-15)

Test results

Last passed 2026-10-15

Claude CodePassed2026-10-15 · install, connect, tools, agent task

CursorPassed2026-10-15 · install, connect, tools, agent task

Claude DesktopNot tested yet—

ChatGPT (Codex)Not tested yet—

Full result per app: Does it work with Claude Code? · Does it work with Cursor?

Protocol: starts, 1 tools listed · 2026-10-15

🧪 Test-box note: Requires Deno on PATH (documented prerequisite). Installed user-local Deno ~/.deno on the box.

Install

claude mcp add mcp-run-python -- uvx mcp-run-python stdio

Run in your terminal. This exact command is what our harness runs in Claude Code; see the results above.

{
  "mcpServers": {
    "mcp-run-python": {
      "command": "uvx",
      "args": [
        "mcp-run-python",
        "stdio"
      ]
    }
  }
}

Save as .cursor/mcp.json. This exact config is what our harness runs in Cursor; see the results above.

{
  "mcpServers": {
    "mcp-run-python": {
      "command": "uvx",
      "args": [
        "mcp-run-python",
        "stdio"
      ]
    }
  }
}

Add to claude_desktop_config.json and restart Claude Desktop. Tested on the Linux beta; see the results above.

[mcp_servers.mcp-run-python]
command = "uvx"
args = ["mcp-run-python", "stdio"]

Add to ~/.codex/config.toml (shared by the ChatGPT (Codex) CLI and the ChatGPT desktop app; Codex runs inside the ChatGPT desktop app). Tested with the ChatGPT (Codex) CLI bundled in the ChatGPT desktop app; see the results above.

Not connecting? Troubleshooting: Claude Code · Cursor · Claude Desktop · ChatGPT (Codex)

Test history

Date	Check	Result	Version
2026-10-15	Protocol (direct stdio)	Protocol: starts, 1 tools listed	0.0.13
2026-10-15	Claude Code	Passed install, connect, tools, agent task	2.1.296 (Claude Code)
2026-10-15	Cursor	Passed install, connect, tools, agent task	2026.10.12-d47ca18

Tools seen by our harness (1)

run_python_code