Where it runs
Only on pages under collaborativedrug.com, the CDD Vault
web application. It does not load on any other site and has no access
to other tabs. With AI write-up switched on it also talks to the AI
service you picked — see below.
What it reads
The extension reads the same data CDD Vault already sends to your browser for the page you have open — ELN entries, samples, batches, locations, plates — in order to show it in the sample panel, copy it to your clipboard, print it, or fill in a CDD form for you. It acts under your own CDD login and can do nothing your account cannot.
What it stores
Your settings: which panel fields you show, prefix colours, the width of a panel, saved phrases, and similar preferences — and, if you use AI write-up, your API keys and house rules. They are kept with the browser's extension storage and stay on your computer. Uninstalling the extension removes them.
What leaves your browser
By default, nothing. There is no backend, no analytics, no crash reporting, no account of ours, and no remote code. The extension's requests go to the CDD Vault server you are already logged into, on your behalf, for actions you triggered — the same requests the CDD page itself would make. The one exception is AI write-up, below, and only while you have it switched on.
AI write-up (optional, off by default)
AI write-up polishes ELN text into English and checks it against the
stoichiometry table, using the language models of the service you pick
in the settings, under your own account and API key:
CERIT-SC AI as a Service
(llm.ai.e-infra.cz, run by Masaryk University within
e-INFRA CZ), OpenAI (api.openai.com) or Anthropic
(api.anthropic.com). Anthropic does not transcribe speech,
so with Claude, dictated audio goes to CERIT-SC or OpenAI, as you pick.
Switching it on asks the browser for access to the service you use;
switching it off gives the access back.
What is sent, and only when you click 🎤, Polish or Polish entry: the text of the ELN entry (or the part you selected), as you wrote it; the stoichiometry table as the names you gave the rows (or their sample and compound IDs), amounts and equivalents; the names of records the entry links to; your house rules; and — for dictation — the audio you recorded.
What is never sent: structures in any form — no SMILES, mol or MRV files, reaction images, molecular weights or the table's IUPAC names — nor attached files, nor your CDD login. (What you typed into the entry's text goes as written.) Each API key goes only to its own service.
What the service does with requests is governed by its own terms and data policy. The answers are shown in the extension's panel for you to copy; nothing is written into your ELN entry.
Not a CDD product
CDD Stoich Tools is an open-source extension written by users of CDD Vault. Collaborative Drug Discovery does not build, endorse, or support it, and has no access to anything through it.
Questions
Open an issue on GitHub or write to matusdrexler@gmail.com. The source code is public, so every claim on this page can be checked.
Last updated 20 October 2026.