Definition
What is an accounting harness?
An accounting harness is the layer between AI apps and a firm's accounting software: one MCP address that connects the books to a team's AI apps, wrapped in the firm's rules, review and records. It holds an AI Brain for the firm and each client, skills, Tasks with reviewer sign-off, the month-end close, access per company and Audit history.
DeepLedger is the accounting harness for AI
Connect QuickBooks or Xero once, and every AI your firm uses works safely across all your clients, with your firm's rules, memory and review built in.
What is in an accounting harness?
One MCP address
Everyone adds the same address, https://mcp.deepledger.ai/mcp, to Claude, ChatGPT, Cursor or another MCP app and signs in as themselves. Nobody shares a QuickBooks or Xero login.
QuickBooks AI setup guidesAn AI Brain for the firm and each client
The AI Brain holds your firm's operating procedures, accounting policies and capitalisation policy, written once for every client. Each company adds its own procedures, policies, and expense and income rules. Where they differ, the client's rule wins. The AI agent is told to read a company's AI Brain and skills before it records anything.
AI BrainSkills
Skills show the AI agent how common jobs are done: the month-end close, bank reconciliation, recording transactions, invoice chasing, cash flow and tax season. Each company gets its own copy to adapt. Changes to how a skill records or stays safe wait for approval in Tasks.
Skills and promptsTasks with reviewer sign-off
Every task has an assignee, a person or the AI agent, plus a due date and a month. Give it a reviewer and only that reviewer can sign it off. What the AI agent isn't sure about becomes a question in Tasks for a person to decide, instead of an entry in the books.
Tasks and reviewThe month-end close
A month closes when an owner or admin signs it off, once its tasks are done or carried over to a later month. The AI agent runs the checklist and gathers the evidence. It never signs off its own close. Sign-off waits while an entry is only proposed or a check is still open.
Month-end closeAccess per company
Owners and admins reach every company in the firm. Other teammates reach only the companies they are assigned to. The server checks the assignment on every request, so removing someone stops their AI agent working in those books. When you work in your active company, each write must name the company it is meant for. If it names none, or a different company, the server refuses it and nothing is written, so a switch in another chat can't send a write to the wrong client's books. An API key limited to one company only ever reaches that company.
SecurityAudit history
Audit history records every tool call the AI agent makes, read or write, with its result, in each company. Owners and admins can export Audit history as a CSV.
Audit history
How is a harness different from a single connector?
A connector lets an AI app read and write the books. A harness keeps that connection and adds what a team needs around it.
- What the AI app gets
- A connector on its own: Tools to read and write the books.
- An accounting harness: The same tools, plus the firm's rules, a place for review, a close sign-off and a record of every action.
- The firm's rules
- A connector on its own: Whatever is in the prompt or one person's chat history.
- An accounting harness: An AI Brain for the firm and each client, which the AI agent is told to read before it records anything.
- Work the AI agent is unsure about
- A connector on its own: Left to the AI app and the person in the chat.
- An accounting harness: A question in Tasks for a person to decide, instead of an entry in the books.
- Sign-off
- A connector on its own: Not part of the connection.
- An accounting harness: A reviewer signs off a task; an owner or admin signs off the month.
- Many clients and a team
- A connector on its own: Depends on how each connection is set up.
- An accounting harness: Each client is connected once; everyone signs in as themselves, and teammates reach only the companies they are assigned.
- The record
- A connector on its own: Depends on the connection.
- An accounting harness: Audit history of every tool call the AI agent makes, read or write, in each company.
Try it on one client first.
14-day free trial from workspace creation. No credit card required.