Join Halfdoor
Your household's shared memory, inside the AI assistant you already use.
Who can sign in
You need an invite from a member, or to be added by Halfdoor.
Sign in with Google, using the email you were invited or added with.
First in your household? Email Halfdoor to be added. admin@halfdoor.ai · Support
Set up your assistant
Connector URL
https://app.halfdoor.ai/mcp
Claude
It opens Claude's "Add custom connector" form with Halfdoor filled in.
- Or by hand: Customize → Connectors → Add custom connector, then paste https://app.halfdoor.ai/mcp.
- Sign in with Google, using the email you were invited or added with. Then read Halfdoor's privacy policy and Terms of Service, and accept them.
Claude's free plan allows one custom connector.
Claude Desktop: if sign-in stops with "Account mismatch", the browser it opened is signed into a different Claude account. Add the connector at claude.ai in a browser signed into the same Claude account as the app; connectors carry over to the app.
ChatGPT
Until Halfdoor is listed in ChatGPT's app directory, ChatGPT needs Developer Mode, on a ChatGPT plan that offers it.
- Plugins → Add → Add custom MCP server.
- Paste https://app.halfdoor.ai/mcp.
- Sign in with Google.
- Read Halfdoor's privacy policy and Terms of Service, and accept them.
- After Halfdoor updates, open the Halfdoor plugin's settings, press Refresh tools, and start a new chat.
Tested on ChatGPT Pro; tell us if another plan doesn't work.
Nothing works until you accept Halfdoor's current privacy policy and Terms of Service.
Optional: send home facts to your review list without asking each time
You can add this line to your assistant's own instructions (its custom instructions or personal preferences). It is your choice and only applies once you add it yourself; Halfdoor never adds it for you:
If you added an earlier version of this line, under the old name or the one that saved straight to Home, replace it with this one yourself. Halfdoor cannot change your assistant's instructions. An old line that names the old name may stop working; one that saved straight to Home keeps saving straight to Home. The review hold on the members page holds every Home save from your assistant for your review either way.
Mine and Home
- Mine is yours alone. Other members never see it.
- Home is shared with everyone who is a member now.
Saving
- Halfdoor doesn't start saves. Your assistant saves a line when you ask it to.
- If you tell your assistant to save certain things without asking each time, that standing instruction counts as asking. Connecting Halfdoor alone does not.
- Every save goes to Mine, Home or your private review list. When the place is not clear, Halfdoor's save tool tells your assistant to ask "Mine or Home?".
- A correction is a new line; it does not remove the old one.
Your review list
- Your review list holds facts your assistant proposes until you decide. Only you see it; nothing in it reaches Home, or anyone else, until you approve it.
- On your review page you can approve each item to Home, move it to Mine, or discard it. Items you do not decide expire after 30 days.
- On the members page you can hold your assistant's Home saves for review: each Home save from your assistant then waits in your review list. With the hold off, your assistant can still save straight to Home when you ask it to or tell it to, and Halfdoor cannot check which.
Photos and documents
- Your assistant's save stores text. It does not keep a photo or a file you share in the chat.
- To keep a photo or a PDF, upload it yourself on the members page, with a caption, to Mine or Home. Your assistant finds it by its caption and gets a link to it; for a photo it may also get a small preview, which its provider receives.
- If you ask your assistant to save facts it read from a photo in the chat, such as a model number, it saves them as an ordinary line; the photo itself is not saved.
Your home record, community notes and the paid plan
Your home record
- Halfdoor can keep a checked record of your home: equipment, key locations such as shutoffs, and service history.
- Only Halfdoor writes it, after checking each fact. Nothing you or your assistant saves becomes part of it.
- Each fact says how it was checked (read from the label, told by the owner, or taken from a document), who checked it and when.
- Every current member of your household can see it on the record page and read it through their assistant, including people who join later.
- A correction from Halfdoor keeps the older version in the history. Any member can ask Halfdoor to delete the whole record, from the record page.
Members can also ask questions about the home record and community notes on Halfdoor's members page (Ask), without an assistant. Members page
Community notes
- Halfdoor can keep short notes about the community your home is in, such as HOA rules, amenities, trash and utilities, and official contacts, each with its source and date.
- Halfdoor writes them in its own words and sets which community your household is in. They hold no residents' personal details.
- They are free. When Halfdoor has no notes for your household's community, Halfdoor's community tool says so.
The paid plan
- The plan pays for Halfdoor to check your home and keep its record current. Halfdoor visits, reads the labels on your equipment and types in the details, and later adds new equipment and service visits. Halfdoor keeps no photos from the visit.
- Reading the record never needs the plan. Every member can see it on the record page, download it in the export, and read it through their assistant. Community notes, and saving and recalling lines, are free too.
- Without an active plan, Halfdoor adds nothing new to the record. What is there stays, and Halfdoor still corrects mistakes, marks things no longer in the home, and deletes the record when a member asks.
- The plan is set up and managed on Halfdoor's website, never in your assistant. Payment goes through Stripe; Halfdoor never sees card details.
- Any member can start the plan on the billing page. Before you start, it shows the price, the renewal period and the trial length.
- The trial needs no card and is once per household. If no card is added by its end, it ends by itself.
- With a card, the plan renews each period until cancelled. Stripe emails a reminder before the trial ends and before each renewal.
- The member who started the plan manages or cancels it from the billing page.
Download your data
- Signed in on the web, you can download a file with your Mine lines and your review list and, while you are a member who has accepted Halfdoor's current policy, your household's Home lines and its home record.
- It never holds other members' Mine, email addresses or billing details.
Accept a new policy on the web
- If your assistant cannot connect, you can accept Halfdoor's current policy on this page. It does not connect an assistant.
When you join
- You can see everything saved to Home, including lines saved before you joined.
- You can see your household's home record, including facts checked before you joined.
- Every member gets an email saying you joined.
- Nothing in anyone's Mine is shared with you.