Parselbox MCP Server

Parselbox is an embeddable Python runtime where AI agents call tools as code - MCP servers, APIs, and shells become native Python objects. Disk-backed workspace, packages, and networking built in; a single-process execution layer powered by Deno and Pyodide. It runs locally over stdio via the published package.

People who work with codemode, pyodide and sandbox and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-28 · ★ 3 · #416 OF 945 MAINTAINED OTHER · VERIFIED 2026-09-18

MIT · Python servers · how we verify → /methodology

01 · Install Parselbox

before you install - you'll need

MY_API_KEY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add thesanjeetc-parselbox -- uvx parselbox

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "thesanjeetc-parselbox": {
      "command": "uvx",
      "args": [
        "parselbox"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package parselbox - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.thesanjeetc is GitHub-verified and matches the repo owner

03 · Who maintains Parselbox

Parselbox is maintained by thesanjeetc. It's the only MCP server we track from this author; the repo dates to Dec 2025.

04 · Facts

repository: github.com/thesanjeetc/parselbox
website: https://github.com/thesanjeetc/Parselbox
category: other - ranked #416 of 945 actively-maintained other servers as of 2026-09-18.
registry: io.github.thesanjeetc/parselbox (active, first published 2026-08-27)
packages: pypi:parselbox

05 · Parselbox FAQ

What is Parselbox?

Is Parselbox still maintained?

Yes - as of 2026-09-18, its last commit was 2026-08-28. We re-verify nightly.

How do I install Parselbox?

Run `uvx parselbox`. The README documents one environment variable (MY_API_KEY) to set first. You can also paste the ready-made client config above.

Does Parselbox run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

06 · Alternatives to Parselbox

Alternatives to Parselbox

Maintained other servers if Parselbox isn't the fit.

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