ChatGPT + LedgerMCP

Connect ChatGPT to real accounting software

Most guides on ChatGPT bookkeeping end with copy-paste. Connect it to LedgerMCP instead: a real double-entry ledger ChatGPT can operate directly. It imports, categorizes, and reconciles; you review.

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ChatGPT, connected

What did I spend on software last quarter, and is anything trending up?
Q2 software spend was $2,340 across 11 vendors, up 18% from Q1. The jump is two seats added in April and a price increase on your hosting plan in May. Want the month-by-month table?

Connect ChatGPT in four steps

The connection is OAuth by URL: about a minute, nothing to install.

  1. 1

    Enable developer mode

    In ChatGPT on the web, open Settings, go to Connectors, open Advanced settings, and turn on Developer mode.

  2. 2

    Add the connector

    Back in Settings, then Connectors, click Create. Name it LedgerMCP, paste https://ledgermcp.com/mcp as the MCP server URL, and check "I trust this application". Everything else is optional.

  3. 3

    Sign in

    ChatGPT opens a LedgerMCP sign-in. Enter your email and the 6-digit code. New accounts are free and created instantly.

Step 4: hand over the books. Ask ChatGPT to set up your chart of accounts, then give it a bank statement to import and categorize. If the steps moved (OpenAI reshuffles settings occasionally), the constant is: add an app/connector by URL, and the URL is https://ledgermcp.com/mcp.

What changes once it is connected

Without a connection, ChatGPT can explain bookkeeping but not do it; every number moves by hand. Connected to LedgerMCP, it works like staff. Paste a statement and it imports the rows. Ask for last quarter’s software spend and it queries the ledger. Tell it to reconcile checking and it walks the worksheet. The web app stays your review surface; every action lands in the audit log.

Under the hood, every request becomes tool calls against the documented surface at /docs, the same 60 tools Claude gets, so switching assistants later costs nothing.

Tool callimport_transactions
{
  "business_id": "b_9f2…",
  "bank_account_id": "ba_check…",
  "batch_id": "stmt-2026-06",
  "rows": [
    { "date": "2026-06-03", "description": "AWS", "amount_cents": 14200 },
    …83 more rows
  ]
}
84 rows imported, deduped against the batch hash. Every row lands in the review queue, unposted.

What people hand ChatGPT

Daily driver

Forward statements as they arrive and let ChatGPT keep the review queue short. It categorizes with your history as context, and every correction you make becomes its next suggestion.

Quarter catch-up

Give it three months of statements in one conversation. Bulk import dedupes, each row posts independently, and it hands you back a short list of judgment calls instead of a weekend of data entry.

Question answering

“What did I spend on contractors?” “Am I profitable this month?” “Which subscriptions went up?” Answers come from the live ledger, not a stale export.

Month-end close

Import, categorize, reconcile to the statement balance, book depreciation, lock the period, deliver the P&L: one instruction, minutes, fully audit-logged.

Guardrails, because it is your money

The safety lives in the database, not in the model. Every entry must balance to the cent. Postings never change; corrections are linked reversals. Duplicate requests return the original entry instead of posting twice. Anything ChatGPT posts, you can reverse with one click. Destructive actions like deleting transactions stay human-only.

That architecture is why connecting an AI here is safer than handing it a spreadsheet: a spreadsheet accepts every mistake silently, this ledger refuses them loudly. Full details on the security page.

Balance enforced

Unbalanced entries are rejected at commit, in Postgres.

History immutable

No edits, no deletes. Corrections post as linked reversals.

Audit-logged

Every write attributed to its credential, append-only.

One-click undo

Reverse anything ChatGPT posted, from Settings.

Common questions

Can ChatGPT connect to accounting software?

Yes. Most advice online still says it cannot, but that changed with connectors. LedgerMCP is accounting software with a built-in MCP server; ChatGPT connects to it directly over OAuth and gets 60 bookkeeping tools.

How do I connect ChatGPT to LedgerMCP?

Turn on developer mode (Settings → Connectors → Advanced settings), create a connector with the URL https://ledgermcp.com/mcp, and sign in with a 6-digit email code. The whole flow takes about a minute, and new accounts are created free during sign-in.

Can ChatGPT do bookkeeping without copy-pasting?

Once connected, yes. ChatGPT posts entries, categorizes transactions, reconciles accounts, and pulls reports through the connection. No copying numbers between windows, no downloading reports to re-upload into a chat.

Which ChatGPT plans support this?

Developer-mode connectors are available on Plus, Pro, Business, Enterprise, and Edu plans as of mid-2026. The LedgerMCP side is free regardless of which plan you use.

Do I need to change any permissions?

No. The default permission level already works: ChatGPT asks you in chat before important changes, and reads happen automatically. You can tighten it to "always ask" in the app settings if you prefer.

Is it safe to give ChatGPT my books?

The ledger protects itself. Entries must balance or the database rejects them; postings are immutable; every ChatGPT action is logged and reversible with one click. You can also issue a read-only key so it can report but never write.

What does ChatGPT actually see?

The books you connect: transactions, accounts, and reports. Bank credentials never pass through ChatGPT or LedgerMCP: live feeds run through Plaid with tokens encrypted at rest, and you can skip feeds entirely with CSV import.

Should I use ChatGPT or Claude for bookkeeping?

Whichever you already pay for. Both get the identical 60-tool surface, and the ledger enforces the same rules for each. Some users connect both: one for daily categorization, one for month-end review. There is no lock-in either way.

How much does it cost?

The software is free, including the ChatGPT connection, unlimited books, and all reports. Live bank feeds are the one paid feature, from $9 per month.

Stop copy-pasting into ChatGPT

Connect it to a real ledger instead. Free to start; no card.

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