How to
How to connect Claude to your accounting software
Claude can answer questions about your books, but it takes a connector to actually pull live ledger data and write entries back. Here is how connecting Claude to your accounting software works.
To connect Claude to your accounting software, you add a custom MCP connector that maps your ledger's API: chart of accounts, invoices, bills, and contacts. Once connected, Claude reads live data and drafts or updates records inside a conversation you start. Sending invoices and deleting records stay behind a confirmation you approve.
Key takeaways
- A custom MCP connector links Claude to your accounting software through its API, not a screen scrape or export.
- Claude reads live ledger data and can draft and update invoices, bills, and journal entries.
- It authenticates as your own account, so it never sees more of the books than you do.
- Sending an invoice or deleting a record waits for a confirmation you approve.
- It works for mainstream platforms like QuickBooks Online and Xero, and for in-house ledgers with no directory listing.
What do you need to connect Claude to accounting software?
To connect Claude to accounting software you need three things: a custom MCP connector built for your platform, an authenticated connection scoped to your own login, and the API access your accounting software already exposes. With those in place, Claude reads and writes to the same ledger your team uses every day.
Most accounting platforms publish an API that covers the core objects:
- Chart of accounts
- Invoices
- Bills
- Payments
- Contacts
A custom connector wraps those endpoints in tools Claude can call, so the data flows into a conversation instead of a CSV export. Connecting it works in a few steps:
- 1We build a custom MCP connector for your accounting platform that maps the chart of accounts, invoices, bills, payments, and contacts.
- 2The connector wraps those API endpoints in tools Claude can call inside a conversation.
- 3You authenticate the connection through your own account, so it inherits your permissions.
- 4Claude reads and writes to the same ledger your team uses, with sends and deletes gated behind a confirmation you approve.
The connection runs through your own account, which means it inherits your permissions. If a member of your team cannot see payroll detail in the software, the connector cannot surface it to Claude either.
What can Claude do once it is connected to your books?
Once connected to your books, Claude can pull live balances, reconcile a customer's open invoices, draft a new bill from a vendor email, categorize a transaction, or update a contact's payment terms. The lookups and drafting that used to mean clicking through the ledger happen in the same chat where you ask the question.
Read examples:
- Summarize aged receivables.
- Compare this month's expenses against last.
- Find every unpaid invoice for one customer.
- Check which bills are due this week.
Write examples: draft an invoice from a quote, create a bill, post a journal entry, or update a contact record. Create and update flow inside the conversation, while sending the invoice to the customer or deleting a record is a separate gated step that waits for your approval.
You set the line
Drafting can run automatically while the outbound send stays behind a confirmation, so Claude prepares the work and you approve the moment it leaves your books.
Is it safe to connect Claude to your financial data?
Connecting Claude to your financial data is safe when the connector is scoped properly. It authenticates as your own account and inherits your permissions, read and write tools are kept separate, and outbound or destructive actions require a human confirmation. The connector never grants Claude more access than your login already has.
You decide which actions run automatically and which pause for a confirmation. Drafting an invoice can be automatic while sending it to the customer, recording a payment, or deleting a record waits for you to approve it, so the highest-stakes changes always keep a human in the loop.
Because the connection is scoped to your account, there is no shared super-user key sitting between Claude and your ledger. Access can be revoked the same way you would revoke any app connected to your accounting software.
Does this work with QuickBooks, Xero, or an in-house ledger?
Yes. A custom connector works with mainstream platforms like QuickBooks Online and Xero, and with in-house or industry-specific ledgers that no connector directory lists. We build the connector for your exact system and schema, with scoped read and write access, including ledgers that run on-prem behind a firewall.
For mainstream software the connector maps the platform's published API and the custom fields and tracking categories your reporting depends on, so Claude writes back to the same structure your accountant expects.
For a custom or in-house ledger, the case is the same one a custom connector is built for: if the system has an API or a database, Claude can read and write to it through a connector built specifically for you.