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 connecting science & health tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-15 · ★ 8 · #44 OF 60 MAINTAINED SCIENCE & HEALTH · VERIFIED 2026-08-25

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

v0.3.0 · 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…

v0.2.1 · 2026-07-17

Patch release - update recommended for all Claude Desktop users. · Fixed: · Panel stuck on "Waiting for data…" with current Claude Desktop (≥ 1.22209.0, auto-updated mid-July 2026). Two host-side changes stacked…

v0.2.0 · 2026-06-11

First PyPI release - install with nothing but uvx chemdraw-mcp. · New since v0.1.0: · Anki flashcard export (export_anki_deck): ready-to-import .apkg decks with rendered structures, reaction schemes and spectra…

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 #44 of 60 actively-maintained science & health servers as of 2026-08-25.
release cadence
4 releases in the last 90 days (latest 2026-08-14)
registry
io.github.jurimaxam-dotcom/chemdraw-mcp (active, first published 2026-06-11 · 3 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 2026-08-25, its last commit was 2026-08-15 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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