Borrowing it
Nothing to install: this file belongs to jurimaxam-dotcom/chemdraw-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/jurimaxam-dotcom/chemdraw-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/jurimaxam-dotcom/chemdraw-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/jurimaxam-dotcom/chemdraw-mcp/claude-md)<a href="https://agentmods.dev/instructions/jurimaxam-dotcom/chemdraw-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/jurimaxam-dotcom/chemdraw-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/jurimaxam-dotcom/chemdraw-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/jurimaxam-dotcom/chemdraw-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.04311 | $0.04311 |
| Opus 5.5 | $0.01724 | $0.01724 |
| Sonnet 5.5 | $0.00862 | $0.00862 |
| Haiku 4.5 | $0.00431 | $0.00431 |
Grade A, and why
chemdraw-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 291 lines — stays where its author put it; the contents beside it link to each section on GitHub.
chemdraw-mcp
Current focus: general chemistry MVP (14.10.2026)
The default server profile is mvp: generate_molecule, batch_generate,
compare_molecules, generate_reaction, export_anki_deck (since 21.10.2026,
for the panel's Add to Anki button and the chat route), plus
lookup_molecule_data and save_png for panel support (7 tools, 6 with a panel). Set CHEMDRAW_PROFILE=full
and restart to restore the full catalog (23 tools, 16 with a panel).
Other tools remain implemented and tested, but are not registered in the MVP.
The immediate goal is a reliable input → correct structure → usable export
workflow for general chemistry. Specialized pharmacy, trainer, quiz and payment
expansion is paused. The existing browser trainer remains separate.
tests/server_catalog.py explicitly builds the full profile for the historical
taxonomy, snapshots and payload checks; tests/test_server_profiles.py verifies
the actual default and explicit profiles in fresh processes. The stdio handshake
derives its expected counts from the selected profile.
Helfer reports are claims to verify, not acceptance evidence (Jay, 14.10.2026). Independently inspect the diff and run the relevant checks before confirming completion. Distinguish repository code, installed package/dependencies and the running Desktop process; matching tool counts alone do not establish matching code.
MCP server for Claude Desktop that turns molecule names or SMILES into publication-style 2D structure drawings. PNG/SVG are the primary outputs (rendered offline via RDKit) — ChemDraw CDXML is an optional extra format, never a runtime requirement.
Build / Run
./install.sh # one-command setup: uv + deps + Claude Desktop config
uv sync # deps only
uv run chemdraw-tool-server # run the MCP server (stdio) manually
uv run chemdraw-doctor # diagnose the installation (env, paths, network)
install.sh registers the server via chemdraw_tool/desktop_config.py
(idempotent merge, writes a .bak backup, never touches other configured MCP
servers). The config logic lives in the package, not in scripts/, because the
wheel ships only chemdraw_tool — PyPI users get chemdraw-install and a fully
working chemdraw-doctor from it. Claude Desktop launches MCP servers with a
minimal GUI PATH, so command must be an absolute path; the installer resolves
it and prints what it wrote.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago Changed · +1 lines · +67 tokens per session 081773fe7802
- 10d ago Changed · +21 lines · +291 tokens per session 54cc7015d8d2
- 21d ago Changed · +9 lines · +227 tokens per session d1a2b72e60e1
- 22d ago Changed · +1 lines · +132 tokens per session 1c52c3882e8e
- 1mo ago Changed · +14 lines · +252 tokens per session 4011322c36d3
- 1mo ago First seen · 245 lines · 3,342 tokens per session scan A 30e5e2c8b856
chemdraw-mcp CLAUDE.md is an instructions file published in the GitHub repository jurimaxam-dotcom/chemdraw-mcp (24 stars, last pushed today), licensed Apache-2.0. It adds 4,311 tokens to every session, about $0.0172 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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