ChemCP MCP Server

by scottmreed Your server? Claim it

local only

ChemCP runs on your own machine — the client starts it, so there is no endpoint to ping. 40 installs a week from npm. Last commit 11 Feb 2026.

MCP App that renders 2D molecular structures from SMILES using RDKit.js

Installs per day peak 40 · avg 10 · -16% w/w

a month agotoday

Installs / week

npm · chemcp

Stars

0 open issues

11 Feb 2026

Last commit

0 releases in 90 days

—

License

TypeScript

Nothing serious here today

Today is the operative word: we check ChemCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add ChemCP -- npx -y chemcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "ChemCP": {
      "args": [
        "-y",
        "chemcp"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.ChemCP]
command = "npx"
args = ["-y", "chemcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "ChemCP": {
      "args": [
        "-y",
        "chemcp"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "ChemCP": {
      "args": [
        "-y",
        "chemcp"
      ],
      "command": "npx"
    }
  }
}

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ChemCP — questions

Answers built from our own checks of this server.

Why is there no uptime for ChemCP?

ChemCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package chemcp was installed 40 times last week.

How do I connect ChemCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls chemcp straight from npm; nothing to host, nothing to sign up for.

How many people use ChemCP?

The npm package chemcp was installed 40 times in the last week. Week over week that is -16%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is ChemCP open source?

We cannot say either way: written in TypeScript and 1 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.