Exact Online in Claude: our open-source Exact Online MCP server 

After Teamleader Focus, we built an MCP server for Exact Online, and it is open-source too. With it, you talk to your bookkeeping in natural language, directly from Claude and other AI assistants. You ask "which customers pay late and for how long?" or "show the trial balance for the first half of the year", and Claude pulls the answer from your own Exact Online administration.

What is an MCP server?

MCP stands for Model Context Protocol, an open standard that allows AI assistants to communicate securely with external systems. Our MCP server translates the questions you ask Claude into real Exact Online actions via the official REST API. Your data remains in Exact Online; the server merely provides the technical connection.

147 actions, from relations to VAT

The server covers the core of a small business's administration: relations, quotations, sales and purchase invoices, the general ledger, banking and cash, VAT codes, items, documents and Exact's pre-aggregated financial reports. 147 tools in total, spread over ten groups, so you can both read and book from a conversation. Working with several administrations? Then you pick per conversation which one you are in. Every Exact region is supported, from Belgium and the Netherlands to the United Kingdom.

What can you ask?

• "Which customer invoices are overdue, oldest first, and what is the total?"
• "Which supplier invoices fall due in the next fourteen days?"
• "What did we spend on account 613000 this quarter, per month?"
• "Create a draft sales invoice for Acme BV with two lines of consultancy at 950 euro and show it to me before booking."

Self-host or have it hosted

Are you technically inclined? Run the server yourself, for free, with your own app from the Exact App Center. The code is available on GitHub under the MIT license and on npm. You can start with a single command: npx boostu-exactonline-mcp. Only want to read? Switch the server to read-only mode and not a single write action is registered.

Don't feel like dealing with installation and token management? Exact rotates your refresh token on every refresh and invalidates the previous one immediately, which makes self-hosting fiddly. That is why we host it for you: you connect with one click in Claude, and we handle the encryption and token rotation. Every connection starts in read-only mode; you enable writing only when you want to. Free during the preview via exact-mcp.boostu.be.

Getting started

• Open-source and self-hosting: github.com/boostuagency/boostu-exactonline-mcp
• Managed version, no setup: exact-mcp.boostu.be
• Also from us: the Teamleader MCP server for your CRM

Questions about an AI integration for your company? Contact us via boostu.be.