MCP server, shipped

Connect your books to Claude, ChatGPT, or Cursor.

Ledg ships an MCP server so any AI client can read your books on demand. Twelve read-only tools today, OAuth 2.1 with PKCE, your data stays in Canada. Ask the questions a 1-person operator actually asks at month-end and get real numbers, not hallucinations.

See how it works →

No credit card. Free up to 100 ledger entries. Data stays in Canada.

Five things people do with the API on day one.

GST/HST return prep, in one prompt

"Q1 GST34-2 line numbers, please." Your AI client calls get_sales, get_sales_tax_collected, and get_expenses for the right window and hands back the line 101 / 105 / 106 / 108 numbers ready to paste into CRA My Business Account. The same flow works for PST/RST/QST.

Monthly close package for your accountant

"Wrap up October." The AI calls find_uncategorized_transactions, get_account_balance for every account, and get_expenses by category, then drafts a markdown summary you forward to your CPA. The same data your accountant pulls from the handoff pack zip, in conversational form.

Ad-hoc bookkeeping questions

"How much did I spend on meals this quarter vs last?" "Most expensive category last month?" "How much did I pay Stripe in fees year-to-date?" Skip opening the dashboard. Ask Claude or ChatGPT and the answer comes from real numbers in your books.

Cash position plus 30-day forecast

"What's my current cash position and the next 30 days of deadlines?" The AI calls get_account_balance for each account, list_deadlines for the next month, and get_expenses for trailing burn. Single answer, no spreadsheets, no five-tab dashboard.

Automated check-ins and reminders

Wire the MCP layer into a Claude scheduled task, Zapier, or n8n. Examples: every Monday flag uncategorized entries to Slack; on the 28th of each month forward a monthly close to your accountant; thirty days before a GST deadline pre-compute the return numbers and email them to yourself.

Twelve read-only tools.

Read-only by design. The AI never posts to the ledger, changes a category, or moves money. Write tools land behind future scopes after the read flow proves itself.

list_corporations

Every business under your login, with entity type (corp or sole prop), province, and registration flags.

list_accounts

Financial accounts (chequing, savings, credit cards) with opening balances.

list_categories

The chart of accounts grouped by section with GIFI codes and entity-type-aware display labels.

get_sales

Total revenue between two dates, excluding owner deposits and loan proceeds.

get_sales_tax_collected

GST/HST or PST collected on revenue entries between two dates, with per-entry breakdown.

get_expenses

P&L operating expenses between two dates with per-category breakdown.

get_account_balance

Account balance as of a given date, opening anchor + entries through that date.

find_uncategorized_transactions

Stage entries waiting for the owner's review, up to 100 most recent.

find_purchases_without_pst

Expense entries in PST/RST/QST provinces with no PST recorded; candidates for self-assessment.

list_deadlines

Tax filing deadlines for the next 12 months, scoped to the entity's filing profile (T2 or T1+T2125, GST, PST, T4, etc.).

list_entry_attachments

Drive web URLs of receipts attached to a ledger entry.

list_minute_book

Corporate minute-book documents (corp only; returns empty for sole props).

Three steps to add Ledg as a connector.

Claude.ai or Claude Desktop

Settings -> Connectors -> Add custom connector
Paste the MCP URL: https://ledg.ca/api/mcp
Approve the OAuth grant in the popup. Done.

ChatGPT (Plus / Team / Enterprise)

Settings -> Connectors -> Add MCP server
Paste https://ledg.ca/api/mcp
Approve. Tools show up in the conversation immediately.

Cursor / power-user CLI

Use the PAT path: Settings -> Connections -> Advanced -> Generate token (ledg_mcp_*).
Add the MCP server with bearer auth in your client config.

OAuth 2.1 with PKCE and Dynamic Client Registration (RFC 7591). Discovery at /.well-known/oauth-authorization-server. JWT access tokens are audience-bound to https://ledg.ca/api/mcp per RFC 8707. Refresh tokens rotate per use.

03 / Get started

One ledger, ready for your CPA.

Free up to 100 ledger entries. No credit card. No meeting to book. Move to Solo at $9 a month when you outgrow it.

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