ChemDraw MCP (unofficial)

Chat → chemical structure. An MCP server for Claude Desktop: you describe a molecule, a reaction or a lab result in plain words, and it draws the figure - a print-ready PNG/SVG rendered locally with RDKit, plus an interactive preview inside the chat. "Draw aspirin" is already a complete command.

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

VERIFIED ACTIVE

LAST COMMIT 2026-09-12 · ★ 13 · #19 OF 71 MAINTAINED SCIENCE & HEALTH · VERIFIED 2026-09-18

Apache-2.0 · Python servers · how we verify → /methodology

01 · Install ChemDraw MCP (unofficial)

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add jurimaxam-dotcom-chemdraw-mcp -- uvx chemdraw-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "jurimaxam-dotcom-chemdraw-mcp": {
      "command": "uvx",
      "args": [
        "chemdraw-mcp"
      ]
    }
  }
}

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 Apache-2.0 - declared in the repository

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

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

03 · What ChemDraw MCP (unofficial) can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Limitations (from the README)

Stated up front, so nothing surprises you in a report: - Java is optional, and that has a price. Without a JRE, OPSIN is skipped and names are resolved online via PubChem/NCI - so name lookups need an internet connection and only work for names those databases index. SMILES input never touches the network. - Spectra are schematic. generate_spectrum draws the peaks it is handed, with the right axis conventions for the

Latest releases

v0.4.1 · 2026-09-12

Fixes the 0.4.0 wheel, which shipped without the chat panel. · Fixed · Every panel in 0.4.0 showed "cannot be reached". The wheel lacked chemdraw_tool/ui/dist/index.html: a dist/ line added to .gitignore for the…

v0.4.0 · 2026-09-12

Five tool areas instead of a fuzzy list, the maths a lab report asks for, and a one-file install for Claude Desktop. · Install in one file · Download chemdraw-mcp-0.4.0.mcpb below, double-click it, confirm in Claude…

v0.3.0 · 2026-08-14

Two new figure types, publication-style rendering options, and a diagnosis command. · Everything that changes how drawings look is opt-in - existing calls render byte-identically to 0.2.1. · New · generate_tlc - TLC…

04 · Who maintains ChemDraw MCP (unofficial)

ChemDraw MCP (unofficial) is maintained by jurimaxam-dotcom. It's the only MCP server we track from this author; the repo dates to Jun 2026.

05 · Facts

repository
github.com/jurimaxam-dotcom/chemdraw-mcp
category
science & health - ranked #19 of 71 actively-maintained science & health servers as of 2026-09-18.
release cadence
4 releases in the last 90 days (latest 2026-09-12)
registry
io.github.jurimaxam-dotcom/chemdraw-mcp (active, first published 2026-06-11 · 5 versions)
packages
pypi:chemdraw-mcp

06 · ChemDraw MCP (unofficial) FAQ

What is ChemDraw MCP (unofficial)?

Chat → chemical structure. An MCP server for Claude Desktop: you describe a molecule, a reaction or a lab result in plain words, and it draws the figure - a print-ready PNG/SVG rendered locally with RDKit, plus an interactive preview inside the chat. "Draw aspirin" is already a complete command.

Is ChemDraw MCP (unofficial) still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-12 and it shipped 4 releases in the last 90 days. We re-verify nightly.

How do I install ChemDraw MCP (unofficial)?

Run `uvx chemdraw-mcp`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does ChemDraw MCP (unofficial) 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.

07 · Alternatives to ChemDraw MCP (unofficial)

Alternatives to ChemDraw MCP (unofficial)

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