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Aparti

Use Aparti in Claude or ChatGPT

Aparti's calculator answers inside Claude or ChatGPT. The figures come from the same engine as aparticalculator.com. Aparti sends them with the instruction to pass them on unchanged and never to compute a figure of its own; what else the assistant says is its own. Every answer with figures carries one line: "These figures are Aparti's, passed on unchanged; anything else in this conversation is the assistant's own words, under its maker's terms. Review the case and print the report at aparticalculator.com: the report is the record."

What it does

• California guideline child support and temporary spousal support for a case you describe: per child and in total, the total payment and who pays it, each party's net disposable income and net after support, with Aparti's notes.
• Each party's taxes: total tax, net disposable income and net after support.
• The case as an Aparti case file (.aparti.json), to save from the chat and open on aparticalculator.com, where you review the case and, with a plan, print the report.
• Figures from a pay stub, W-2, 1099, 1040 or FL-150. The assistant gives you a link to Aparti, for your account only, whose figures go back once, within 15 minutes. You drop the document on Aparti's case screen, check each figure, and press Return. The document never goes to the assistant.
• A case file you saved on aparticalculator.com, with no documents in it. Give it to the assistant and it sends the file's facts to Aparti to compute. A file the website saves carries a record that catches a fact changed on the way; Aparti then computes nothing and sends you to open the file on the website. An older file without the record is computed, and the answer says it could not be checked. A file that carries documents, or figures read from documents, is refused: open it on the website.

Through the chat Aparti gives the figures only. The calculation's steps, each tax line and the joint return's split stay on the website, where the report is printed. Documents are read on the website, never in the chat; a Social Security number is refused; buying a plan and managing your firm are done on aparticalculator.com.

In the chat, Aparti computes California cases; a case in another state Aparti covers is computed on aparticalculator.com.

Aparti tells the assistant to ask you for facts only and never to recommend a legal or tax choice, such as who claims a child, a filing status or whether to seek spousal support. Aparti computes each one you give it and does not advise on it.

Who can use it

• Every paid plan (Solo, Team and Firm, each seat with its own sign-in) and a purchased case. See the plans.
• Sign in on aparticalculator.com at least once first, with the email you will connect from. Aparti never creates an account from the chat; a person who has not signed in on the website reads: "Your Aparti account is not set up yet. Sign in at aparticalculator.com with the email you used to connect, then try again."
• A free account connects, and for a case it has not bought reads this answer and none of Aparti's figures: "This case is not included in your Aparti plan, so Aparti in Claude shows no figures for it. The plans are described at https://aparticalculator.com/plans." Through ChatGPT it names ChatGPT. The assistant is told not to estimate the figures itself.
• A California court address that has signed in on aparticalculator.com by email code works in the chat too; a court that signs in by typing its address alone cannot connect.

How to connect

The address is https://mcp.aparticalculator.com/mcp. Sign in with the email code, the same account as the website.

In Claude: open Customize, then Connectors, and choose Add custom connector. Paste the address, press Add, then Connect. If Claude asks how to sign in, choose "Sign in now" and "Use Claude's published identity". Aparti's sign-in page opens: enter your email, then the code sent to it, and allow. On a Claude Team or Enterprise plan an Owner adds the connector once; each member then signs in with their own Aparti account.

In ChatGPT: a workspace admin adds Aparti as a custom MCP server with the same address, with OAuth as the sign-in, following OpenAI's steps for connecting an MCP server (ChatGPT Business, Enterprise and Edu workspaces). Sign in with your Aparti email code when asked.

To disconnect, remove the connector in the assistant.

Your client's data

What you type in the chat, and the figures Aparti returns into it, are held by the chat's maker under its own terms, not Aparti's. The plan you are on decides whether they can be used to train its models:

• Claude Team and Enterprise: Anthropic does not train on your conversations by default.
• Claude Free, Pro, Max and Ultra: whether your chats are used for training is a choice in your account settings; if allowed, Anthropic keeps them up to five years. Treat the figures Aparti returns into such a chat as part of it.
• ChatGPT Business, Enterprise and Edu: OpenAI does not train its models on data accessed from apps by default.
• ChatGPT's personal plans (Plus and Pro): sharing your content for training is on by default; you can turn off "Improve the model for everyone" in settings. A custom server such as Aparti's connects only on Business, Enterprise and Edu.

For a client's case, use Claude Team or Enterprise, or ChatGPT Business or Enterprise, and decide whether its terms meet your duties. Both makers can change these terms; read the current ones before you rely on them.

The State Bar of California's practical guidance on generative AI says a lawyer must not input any confidential information of the client into a generative AI solution that may present material risks to confidentiality or security, absent informed client consent, and that reasonable efforts may include reviewing a vendor's terms of use, privacy policy or documentation, not only its marketing. On Aparti's side, that documentation is this page and our Privacy Policy; the chat's maker publishes its own.

What Aparti keeps and logs

• Nothing from the conversation is stored. Aparti computes each case from the facts the assistant sends and keeps none of them after answering, as on the website. The calculation itself uses no AI service, and Aparti does not use your case figures to train AI models.
• Each sign-in and each call is logged: the account, the kind of request, its result and the time; a refused sign-in and an outage are logged the same way, and so is each step of a document link (made, opened, returned, fetched or refused, and why), with the account and the party, never the link's code. Never the case, never a figure, never a word of the chat. These records live in our hosting provider's logs, kept on a rolling basis.
• A limit of 40 calls a day that compute figures, per person, counted by the Pacific day. Past it, the assistant is told you have reached today's limit and to open the case at aparticalculator.com or try again tomorrow. To keep the limit, Aparti counts each person's calls that compute figures for each Pacific day in its own database: the account, the day, the count and whether the limit was reached, never the case. We delete these counts after eight days. When a person reaches the limit on two days in one week, our team is told by a Slack message, at most once a week, with the account, its email, firm and plan, and the two days.
• A document link: while it is open (at most 15 minutes), Aparti's server holds the link's code, your account, the party it is for and the assistant's name. After you press Return, it also holds the figures you return (for each one the party, the row, the monthly amount, the kind of document, two yes-or-no details the row needs, on a rental loss the part deducted this year, and whether you confirmed it) in its working memory for at most 10 minutes more, until the assistant fetches them once; then the link and its figures are deleted. Aparti keeps no copy of them on disk or in a database. The document itself is read as any document you drop on Aparti, as the Privacy Policy describes, and never goes to the assistant.

Support

Write to [email protected] from the email address on your Aparti account, and we reply by email. Say which assistant you use, what you asked and what it answered. Never send a client's document or a Social Security number by email: documents are read on aparticalculator.com. The same address answers questions about your account, a plan or a purchase, and requests about your information under our Privacy Policy.

We have applied to the Judicial Council of California for certification under Family Code section 3830 and rule 5.275. Every figure Aparti produces is an estimate; a court decides the amount of support in every case. Not legal advice.