A JustOnce shared space lets one person save a household document once and everyone in the space recall it from their own AI assistant. Your assistant reads the photo, saves the facts, shares them, and gives you a one-time link to attach the original; a partner’s Claude or ChatGPT answers from those facts, attributed to you.
Who in your house knows where the insurance policy is?
One person, usually. They know the insurer, the excess, when the car is due, which filter the dishwasher takes and what the plumber said last time — and everyone else asks them. A pipe bursts at eleven on a Sunday night and the person who is not the search engine is holding the phone. Sharing one ChatGPT login does not fix it: one assistant, two people’s context, no idea whose is whose. A ChatGPT shared project only works inside ChatGPT, and switches to project-only memory the moment you share it. A shared space is a place instead of a person: the policy goes in once, and anyone in the space can ask their own assistant.
Shared-space recall is live. An assistant’s memory search returns memories other members shared into your active spaces, attributed to the sharer and read-only to you.
How does a photo of a policy become something my partner’s AI can answer from?
You photograph the policy — or the rating plate, or the discharge letter — and send the picture to a connected assistant with one prompt. Its own vision reads it; JustOnce runs no OCR, and that is deliberate. The assistant saves the facts as a memory and shares it into your household space. To keep the original, it hands you a one-time upload link: open it, drop the photo in, and the file is attached, encrypted, to that memory and travels with it. Later, your partner asks their own assistant — Claude, ChatGPT, whichever they use — what the excess is. The answer comes back from what you shared, attributed to you. Ask for the policy itself and their assistant fetches the original over the authenticated connection, or they open it from the space in the web app. No public link, no shared folder.
The assistant calls request_upload_link with the facts it read, a category and the space id — memory written, share made, and the file attached when the upload lands, in one step. A member’s assistant recalls through search_memories and fetches with fetch_document. Every fetch is audit-logged.
What goes in a household space?
The things one person currently carries in their head. Home, contents and car insurance, with the policy attached. The mortgage or the lease. The rating plates off the appliances — model, serial, install date, warranty end — which nobody transcribes until the thing dies. Car registration and service history. The school’s allergy plan and the immunisation record. For a parent you are caring for, the medication list, the discharge letter and who holds power of attorney. All of it filed by category, with the dates and amounts inside it extracted, and the original file kept.
Everything saved is sorted into one of 18 categories, including Insurance, Property & Home, Vehicles, Health, Family and Legal, with people, dates and amounts extracted alongside.
Caring for a parent, with your siblings
Two siblings, one ageing parent, and a medication list that lives in somebody’s phone photos. The sibling who happens to be at the appointment reconstructs the history from memory; the other one finds out afterwards. Put the discharge letter, the specialist’s name and the current medications in a space the three of you share, and the person at the next appointment asks their assistant what changed last time — with the letter itself a question away. When the care arrangement changes, remove a member or close the space; what you shared stays in your own vault.
Each sibling needs a justonce.ai account, which is free, and joins the space free. Roles are Owner, Editor and Viewer; the Owner can remove members and close the space.
What does sharing a document actually do today?
Precisely this. A document always lands in your own vault first, attached to the memory your assistant wrote from it. Share that memory into a space and the file goes with it: members read the facts in the web app, their assistant’s memory search recalls them attributed to you, and any member can fetch the original through their assistant or open it from the space in the web app. Two edges worth knowing. If your assistant split a long document into several memories, share all of them — a member sees exactly the memories shared, not the rest of the set. And it is your assistant’s memory search that reaches shared spaces; its topic briefings and your core profile still draw on your own vault only.
Document bytes are encrypted under the uploader’s key and served to members through the authenticated service, never by link. Pages are metered once, against whoever saved the document. Files up to 25 MB.
Does my partner need to pay, or use the same assistant as me?
Neither. Members join a shared space free, and recall is free on every plan, so a partner on the Free plan reads everything you share. They connect whichever assistant they already use: Claude accepts a JustOnce connector on its free plan (one custom connector), ChatGPT with Developer mode turned on, Cursor and any other MCP client. The only thing you both need is a justonce.ai account, because an invitation is matched to an existing user.
Recall and search are unmetered on every tier. The Free plan includes two AI-assistant connections.
Copy and paste
Prompts for this
Paste these into any assistant you've connected to JustOnce. They work as written.
Share the policy, not just the policy number
Your assistant reads the photo — JustOnce runs no OCR — saves the facts and shares that memory into the space. For the original it gives you a one-time upload link (works once, expires in 15 minutes); the file attaches to the memory and goes with it, so any member can fetch the policy.
Read this photo of our home and contents insurance policy. Save the insurer, policy number, excess, claims line and renewal date to JustOnce as one memory, keep the photo attached to it, and share it into our "Smith Household" space.
File the rating plate before the appliance dies
One memory shared into the household space, with the photo attached through a one-time upload link. Years later either of you can ask for the model number, or the photo, from whichever assistant you are using.
Here is the dishwasher’s rating plate. Save the model, serial and install date to JustOnce, keep the picture attached, and put it in the "Smith Household" space so Sam can find it.
Keep the discharge letter where every sibling can reach it
Separate, recallable facts rather than one blob, with the letter attached through a one-time upload link — and because the prompt says "all of them", every memory reaches the space, not just the one the file hangs off.
Mum’s discharge letter is attached. Save the medication changes, the follow-up date and the cardiologist’s name to JustOnce as separate memories, keep the letter attached, and share all of them into the "Mum’s care" space.
Ask about something your partner shared
Recall reaches the shared space: the facts come back attributed to whoever shared them, and the original file is fetched over the authenticated connection — no download link, no shared folder.
A pipe has burst. What is our home insurance excess and who do I call? Tell me who saved it, and pull up the policy.
Yes. An invitation is matched to an existing justonce.ai account, so your partner signs up first — it is free, no card — and then you invite them by email. They join the space free and can read it from the web app or from their own connected assistant.
Can I share a document, or only a memory?
You share the memory the document is attached to, and the file goes with it. Every document lands in your own vault first, attached to the memory your assistant wrote from it; once that memory is in a space, any member can fetch the file through their assistant or open it from the space in the web app, and each fetch is logged. If a long document was split into several memories, share all of them.
Does JustOnce read the photo of my policy?
No. JustOnce runs no OCR at all. The assistant you send the photo to reads it with its own vision and writes the facts as memories; JustOnce stores those facts and keeps the original image encrypted alongside them. The one exception: if you have added your own model key in Settings, JustOnce asks your model to transcribe a file that arrives without text. The model does the reading, we do the remembering.
Can my partner use ChatGPT while I use Claude?
Yes. A shared space is read through whichever MCP client each member connects — Claude, ChatGPT, Cursor, Gemini CLI or any other. Their assistant’s memory search recalls what you shared, attributed to you, alongside their own memories. Claude takes a JustOnce connector on its free plan (one custom connector); ChatGPT needs Developer mode turned on.
Who pays for the pages?
Whoever saves the document. A document is metered once, in pages of 2,000 characters of text, against the account that saved it. Reading it, recalling it and fetching it cost nothing, on any plan, for any member.
What if I stop sharing?
Take the memories back out of the space, remove the member, or close the space — closing it revokes everything it granted. Nothing you shared is deleted; it stays in your own vault.
Is it safe to put a power of attorney in there?
Documents are encrypted at rest with AES-256-GCM under your own key and only ever served through the authenticated service — there is no link that can leak. Memory bodies are encrypted under a key for their space. Nothing is used to train models, and every document fetch and membership change is written to an append-only audit log. Being precise: this is not end-to-end encryption — search runs over decrypted text inside our service, under keys we hold, so that search works.