What it is
FermentAdvisor is a fermentation advisor. Connected to ChatGPT, it works with your real jars — your active ferments, your cultures, your history — instead of answering from general fermentation knowledge.
Everything the connector does runs through the same FermentAdvisor service as the app. A jar you start in a conversation appears in the app; a jar you check or finish in the app informs what ChatGPT sees. One account, one set of jars, wherever you work. FermentAdvisor is live on the App Store and Google Play — the connector works the same either way, and you don’t need the app at all to use it.
ChatGPT opens FermentAdvisor’s cards and forms — your jars, a jar’s status, a ferment plan, a diagnosis — right in the conversation when a tool calls for one.
What you can do
Browse what you can ferment. Ask what FermentAdvisor covers, or about a specific ferment — sourdough, kimchi, yogurt, kombucha, hot sauce, miso, and more across a dozen-plus sub-domains — and get the real method, ratios, and safety notes, sourced from tested references, not guessed.
Plan a ferment. A free, unlimited conversation-only preview shows you the recipe and the full schedule — every check-in, feed, and safety window — before anything is created. Say the word and it becomes a real jar with its own clock.
Check in mid-ferment. Tell it what you’re seeing, optionally with a photo, and get a real verdict against your jar’s own stage and timeline — not a generic "looks fine." Safety calls (mold, off smells, a batch that’s genuinely gone bad) are never softened.
Log the finished result. Photo, notes, how it turned out — saved to that jar’s history, with a comparison against past runs of the same ferment so you can see what changed.
Manage cultures and reminders. Feed a starter or SCOBY, switch it active/dormant, and mark reminders complete as you go — FermentAdvisor tracks what’s due and won’t let a feed window slip by silently.
Work your jars. List everything you have going, pause or resume a jar, close one out, or delete it — your library stays accurate to what’s really on your counter.
Planning is always free and unlimited. Starting a jar, checking in, and logging a result draw from a shared free-use pool; FermentAdvisor Pro makes all three unlimited.
Example prompts
Say what you want in plain language — FermentAdvisor engages when the request is about your own jar, your ferments, or your culture:
- “Plan a ferment with FermentAdvisor.”
- “Is my kimchi ready to check?”
- “What jars do I have going?”
- “It’s done — log it.”
How to connect
You’ll need a ChatGPT account and about a minute:
1. In ChatGPT, open Plugins in the left sidebar, then the + menu at the top right and choose Add custom MCP server. Name it FermentAdvisor and leave Authentication on OAuth.
2. Paste in the URL https://api.fermentadvisor.app/mcp.
3. ChatGPT opens FermentAdvisor’s sign-in page. Enter your email — we send a sign-in code to your inbox. No password to create, no card required.
4. Enter the code and approve the connection. If you’ve used the FermentAdvisor app with the same email, your jars are already there. If you’re new, a free account is created on the spot.
This works on free ChatGPT accounts. The plugin is personal to your account — it lives under Plugins → Personal → Created by you — and doesn’t appear in ChatGPT’s public plugin directory.
Then just ask — see example prompts above.
To disconnect at any time, remove FermentAdvisor from ChatGPT’s Plugins page. Access tokens expire on their own.
How photos work
Photos never travel through the conversation. FermentAdvisor hands you a private, single-use link that opens a photo form on our site — take a photo or choose one from your library there, and it uploads directly. Photos are held briefly and deleted once analyzed, and a shot taken in the form goes straight to the check without being saved to your phone — use your camera app first if you want to keep it.
What’s free
Planning a ferment through the connector — the recipe and schedule preview — is free and unlimited, for anything on the roster. Starting a jar, checking in, and logging a finished result draw from a shared free-use pool; FermentAdvisor Pro ($39.99/year or $4.99/month) makes all three unlimited, the same as in the app. There’s nothing extra to buy for the connector itself, and nothing to buy through ChatGPT.
Privacy
The short version: we receive only what the tools need — the details of each request and the photos you submit through our own forms. We never see your ChatGPT conversation, and ChatGPT only sees what a tool returns. The full details live in the connector section of our privacy policy.
Questions or trouble
Write to support@fermentadvisor.app. If a sign-in code doesn’t arrive, check your spam folder first — codes expire, and you can always request a fresh one by starting the connection again.