PubChem Finder MCP Server

by mysterionrise Your server? Claim it

local only

PubChem Finder runs on your own machine — the client starts it, so there is no endpoint to ping. 962 installs a week from pypi. Last commit 2 Nov 2026.

Search PubChem by structure: a local similarity/substructure index, live PubChem data, RDKit tools

Installs per day peak 327 · avg 53 · +50% w/w

a month agotoday

962

Installs / week

pypi · pubchem-finder

Stars

10 open issues

2 Nov 2026

Last commit

from GitHub

MIT

License

Python

Nothing serious here today

Today is the operative word: we check PubChem Finder 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 pubchem-finder -- uvx pubchem-finder

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

{
  "mcpServers": {
    "pubchem-finder": {
      "command": "uvx",
      "args": [
        "pubchem-finder"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.pubchem-finder]
command = "uvx"
args = ["pubchem-finder"]

.cursor/mcp.json

{
  "mcpServers": {
    "pubchem-finder": {
      "command": "uvx",
      "args": [
        "pubchem-finder"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "pubchem-finder": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "pubchem-finder"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: PUBCHEM_FINDER_HOME (Data directory for the local index and the PubChem response cache (default: the platform's user data directory)).

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PubChem Finder — questions

Answers built from our own checks of this server.

Why is there no uptime for PubChem Finder?

PubChem Finder 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 pypi package pubchem-finder was installed 962 times last week.

How do I connect PubChem Finder?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls pubchem-finder straight from pypi; nothing to host, nothing to sign up for.

How many people use PubChem Finder?

The pypi package pubchem-finder was installed 962 times in the last week. Week over week that is +50%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is PubChem Finder open source?

Yes — it is published under the MIT licence, written in Python, 9 stars on GitHub and 10 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.