Since Exact Online became reachable through the Model Context Protocol, six serious connectors have appeared in a short time. At first glance they look alike - you paste a URL into your AI assistant and ask a question - but they diverge sharply the moment you ask for something harder than an outstanding balance.
Which AI connector for Exact Online is best?
For most companies Ledger Botje is the logical choice. It is the only connector that covers stock, orders, manufacturing and warehousing alongside the financial part, the only one that calculates analyses over the complete dataset instead of the first few dozen records, and with 292 tools of which 170 can write, the only one that actually takes work off your hands. If you ask a handful of financial questions a month and price is the only criterion, a free plan will get you a long way.
Six vendors side by side
| Connector | Tools | Price per month / AI requests | Write | Own cache | Strongest at |
|---|---|---|---|---|---|
| Ledger Botje | 292 (122 read, 170 write) | €39 / 5,000 €59 / 8,000 effectively unlimited; the bundle does not block | Yes, from €59 | Yes | Depth in trade, stock and manufacturing; analysis over the full dataset |
| Praat met je Boekhouding | 118 (83 read, 31 write, 4 bulk) | €0 / 200 from €49 / unlimited | Yes, from €49 | No | Lowest barrier; free to try without payment details |
| Exact AI Connect (iWebDevelopment) | Not published; per the vendor also stock and manufacturing (M) | €29 per user / 5,000 - 15,000 | Yes, on approval | No | Largest request bundle per user |
| Finance MCP | Not published; financial only (M) | €25 / uncapped | No | No | Eight accounting packages behind one connector; no request cap |
| Invantive MCP | No separate tools; SQL over ~1,235 tables (XL) | Unknown (beta) | No | Yes | By far the widest table coverage for those who write SQL |
| Zapier MCP | No fixed set; you assemble your own (XL) | from $19.99 / from a shared task pool | Yes | No | Forwarding Exact Online into thousands of other apps |
Monthly rates excluding VAT, verified with each vendor on 21 August 2026. A low entry price usually comes with a small request bundle, so always compare price and requests together. At Ledger Botje that bundle is informative: your assistant is told what it has used, but no request is refused. Mind the unit as well: Exact AI Connect charges per user, and Zapier draws requests from a task pool you share with your other Zaps. Only Ledger Botje keeps its own copy of your data. That buys you two things: answers come back far faster, and they are complete - an analysis runs across your whole year instead of the first few dozen records. See large analyses in Exact Online with AI. The full price breakdown is in what does an AI connector for Exact Online cost.
The Own cache column matters more than it looks. Ledger Botje is the only connector that keeps its own copy of your data and can write to it as well. Answers therefore come back far faster and complete, instead of truncated at the first few dozen records.
How much of Exact Online can you actually reach?
This is where the differences are largest, and it is rarely asked. Exact Online is not an accounting package but an ERP: alongside the ledger and invoices it holds stock, items, batches, serial numbers, warehouses, sales and purchase orders, manufacturing orders, projects, hours and CRM.
Most connectors expose the financial part. Ledger Botje currently has 292 tools, of which 122 are read-only and 170 can create or change data. That is not a bigger number for its own sake; it is the difference between “what is my revenue” and “create a purchase order with this supplier for the items below their minimum stock level”.
At the other end of the spectrum sits Invantive, with roughly 1,235 tables for Exact Online. That is wider than anything else, but you query it with SQL and the MCP route is a read-only beta that works with Claude alone.
Reading is easy, writing is the difference
A connector that only reads can be built in a weekend. A connector that writes has to understand how Exact Online fits together: that a sales order has lines with their own delivery dates, that an entry has to balance, that a goods receipt hangs off a purchase order.
Finance MCP and the Invantive beta are deliberately read-only. Praat met je Boekhouding writes from Pro up. Exact AI Connect asks for approval on every write action. Ledger Botje has write access in Advanced, with a switch per administration: leave it off and the write tools are not even visible to the assistant.
What happens with large analyses?
Here is a limit you only discover when you hit it. A connector that passes every question straight through to the Exact Online API has to fetch data page by page, and runs into two things: Exact's daily API call budget, and the number of records returned per question.
Exact AI Connect Essentials, the entry plan from iWebDevelopment, retrieves at most 60 records per question. For “find invoice 2026-0481” that is plenty. For “compare revenue per month across the whole year” it is not, once you have more than 60 invoices in a month.
Ledger Botje keeps Exact Online data in its own database per administration. It is updated every fifteen minutes through the evening, refreshes itself the moment a question touches data that has gone stale, and can be reloaded manually from the app with a single button. A question about margin per product group therefore becomes a calculation inside the database, across all rows, rather than across the first batch retrieved. That difference is worked out in large analyses in Exact Online with AI.
Does it work with the assistant you already use?
Almost everything runs on MCP, so most connectors work with most assistants. Practice is messier than the promise: every assistant has its own way of adding an MCP server, and some cut off at a maximum number of tools.
Ledger Botje therefore keeps a separate setup guide per assistant, for ChatGPT, Claude, Microsoft Copilot, Gemini, Cursor, Grok, Mistral, Perplexity and OpenClaw. The Invantive beta is the only one here tied to a single assistant.
How secure is the connection?
You are giving an external party access to your administration. Three things to ask, whichever vendor you pick:
- How it signs in. A connector should use OAuth, so you never hand over your Exact Online password and can revoke access at any moment.
- Where the data sits. Finance MCP processes within Western Europe and stores no financial data; Ledger Botje keeps a cache per administration and records what happens to it in the data processing agreement.
- What gets logged. Ask whether every tool call is traceable, and how long those logs are kept. More on that under security.
Choose based on your situation
- Trade, wholesale or e-commerce with stock: Ledger Botje, because stock, orders and warehouses simply are not in the other connectors.
- Manufacturing: Ledger Botje, for the same reason, with manufacturing orders and batch or serial numbers on top.
- Accounting in a company that does more than invoice: Ledger Botje, because every connector handles the financial questions, but only here do you not hit a wall the moment the question touches stock or orders.
- Multi-year analysis: Ledger Botje, the only one with its own cache that aggregates over the complete dataset rather than the first records retrieved.
- Accounting firm with dozens of administrations: Ledger Botje Advanced covers 10 administrations and scales with add-ons up to 60, with write access and the full breadth. The firm bundles from Finance MCP and Praat met je Boekhouding are cheaper per administration, but stay within the financial part.
- Freelancer or small firm with financial questions only and a tight budget: a free plan will do, for instance the one from Praat met je Boekhouding. Add stock, orders or quotations to the mix and Ledger Botje Basic at 39 euros a month with 5,000 requests is the step you end up taking anyway.
- Forwarding into other software: Zapier, because that is what it was built for.
To try the depth yourself, start with the prompt library or connect your own administration through MCP setup.