connect claude to shared expenses · august 2026
connect claude to your shared expenses in one paste.
count is a shared-expense ledger with a hosted mcp endpoint. paste one url into claude's connectors, then say what you paid for. there is no repo to clone and no process to keep alive.
four steps below, of which one happens inside count. the other three are claude's own settings screen.
01 · the four steps
one url in, six tools out.
claude reads remote mcp servers as custom connectors. a connector is a url, so connecting a ledger to claude is a paste, not an install.
get your key. one click, no form and no account: count.nanocorp.app/key mints a url that looks like https://count.nanocorp.app/mcp/k_…
this is the only copy. bookmark it, or add an email so we can send it again.
in claude, open settings → connectors, then click add custom connector.
on a team plan an owner adds it once in organization settings instead.
paste the key as the url. leave every other field alone, then click add.
no client id, no client secret, no oauth. there is nothing else to fill in.
claude lists six tools. say: make a count for my flat with maya and theo
that returns the count, the three members and a share link for the other two.
02 · the first expense
the balance arrives in the sentence.
add_expense returns every member's new balance, to the cent. that is the whole reason to move a ledger into an agent: the answer comes back where you asked for it.
I paid $184.20 for groceries, split three ways
add_expense
recorded. maya owes you $61.40. theo owes you $61.40.
nothing was typed into a form, and maya and theo were not asked to sign up.
03 · what to say
five sentences that cover most of a flatshare.
you never name a tool. claude picks it. the docs list all six with their arguments and a real response.
where this is the wrong tool
if nobody in your flat uses an agent, a share link and a spreadsheet will serve you better, and tricount is free. count earns its place when one person already has claude open all day — that person can then keep the ledger true without asking anyone else for anything.
04 · questions
what is mcp, in one sentence
mcp is the protocol claude uses to reach a tool that lives somewhere else, so the tool can be a hosted url instead of software on your machine.
do I need a repo, docker or a local process
no. count runs hosted at count.nanocorp.app. that is the difference between this and the open-source splitwise wrappers, which are all local and each need their own api key.
does everyone in the count need claude
no, and this is the point. every count has a share link that opens a plain web ledger: no signup, no download. one connected agent keeps the ledger true for everyone else.
claude says it cannot reach the connector
check the url ends in your key and has no trailing space. then prove the endpoint answers with the curl one-liner in the docs. if curl answers and claude does not, remove the connector and add it again.
can I do this from chatgpt or cursor instead
yes. cursor takes the same url in ~/.cursor/mcp.json. chatgpt needs developer mode, and on plus and pro its connectors read balances but do not write today.
what does it cost
nothing today. your agent does the language work, so count is a ledger and an endpoint, which is cheap to run. a one-time lifetime licence is planned for people who keep more than 3 counts.
is my key a password
treat it like one: anyone holding it can read and write your counts. you can rotate it from /me, which revokes the old one immediately.
the one thing you will ever touch
one url. pasted once. by one person.
https://count.nanocorp.app/mcp/k_••••••••••••••••
get your keyfree. the next page mints your key and shows the exact click path for claude, chatgpt and cursor.