e-Boekhouden MCP server

Read e-Boekhouden relations, invoices, ledgers, bookings and products; create relations, invoices. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect e-Boekhouden50 free tool calls a month

What can I ask?

Turn on the e-Boekhouden connector, then ask in plain words. The AI picks the tools.

Which customer invoices are still unpaid, and how much is outstanding in total?
Show the invoices we sent to Acme Ltd this year.
What is the balance of each ledger account right now?
Add a new customer called Acme Ltd with the email billing@acme-example.com.

What you can do with e-Boekhouden in Claude and ChatGPT

For Dutch small business owners and bookkeepers who keep their accounts in e-Boekhouden.

See which invoices are still unpaid

The AI lists open invoices, either debtors (customers who owe you) or creditors (bills you still have to pay), and adds up the outstanding amount.

Find the invoices created for a customer

The AI searches invoices by invoice number, relation or date range and opens one with its items and amounts.

Check ledger balances for a period

The AI reads the balance of one ledger or of all ledgers (a trial balance), for a period and optionally per cost center.

Review bookings of a type

The AI searches mutations by type, such as invoices received or money sent, and opens one with its ledger, VAT code, amount and relation rows.

Add or update a customer or supplier

The AI creates a new relation (customer or supplier) with name and details, or changes fields of an existing one. Fields you leave out keep their values.

Changes data

How do I connect e-Boekhouden?

Before you connect

The login page asks for your e-Boekhouden API token and Your e-Boekhouden site.

Create a token in e-Boekhouden under Beheer → Inrichting → Koppelingen → e-Boekhouden API (it is shown only once; you can set an expiry date). Your token is exchanged for a short-lived session on every request and is used only to call the e-Boekhouden API on your behalf; it is never shown to anyone. Deactivating the token's user or letting the token expire disconnects this server.

Claude claude.ai · Desktop

Open Customize → Connectors, then click + Add → Add custom connector.
Enter the name e-Boekhouden and this URL, then click Add:
https://e-boekhouden.usefulapi.io/mcp
Claude opens the login page: enter your e-Boekhouden API token and Your e-Boekhouden site.
In a chat, click + → Connectors and turn on e-Boekhouden.

Team and Enterprise: an Owner adds the connector for the organization first.

ChatGPT chatgpt.com

Open Plugins, click +, then Add custom MCP server.
Enter the name e-Boekhouden and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://e-boekhouden.usefulapi.io/mcp
ChatGPT opens the login page: enter your e-Boekhouden API token and Your e-Boekhouden site.
In Plugins, install e-Boekhouden, then choose it in a chat.

No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.

Claude Code

Run this command, then run /mcp in Claude Code to log in:

claude mcp add --transport http e-boekhouden https://e-boekhouden.usefulapi.io/mcp

Cursor

Add to Cursor or add this to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "e-boekhouden": {
      "url": "https://e-boekhouden.usefulapi.io/mcp"
    }
  }
}

VS Code

Add to VS Code or add this to .vscode/mcp.json:

{
  "servers": {
    "e-boekhouden": {
      "type": "http",
      "url": "https://e-boekhouden.usefulapi.io/mcp"
    }
  }
}

Codex

Run these commands. The second one opens the login page:

codex mcp add e-boekhouden --url https://e-boekhouden.usefulapi.io/mcp

codex mcp login e-boekhouden

Other clients

Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.

https://e-boekhouden.usefulapi.io/mcp

Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your e-Boekhouden API token and Your e-Boekhouden site. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Proper API token	$9/mo · $90/yr	10,000 tool calls / month
Pro+per API token	$39/mo · $390/yr	100,000 tool calls / month

Each paid plan covers this e-Boekhouden server only. Ask your AI to run eboekhouden_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with eboekhouden_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with eboekhouden_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

Tools 29

Show all 29 tools (the AI picks them for you)

Read only · 21

List or search relationseboekhouden_list_relations
List relations (customers and suppliers of the administration), optionally filtered (filters combine with AND). Text filters match exactly unless match is contains or starts_with. Paged: pass next_offset as offset.
Get a relationeboekhouden_get_relation
One relation with all its fields (addresses, e-mail addresses, VAT and KvK number, IBAN, payment term, ledger).
List or search invoiceseboekhouden_list_invoices
Search the invoices created in the invoicing module, by invoice number, relation or date (exact, or from/to). Paged: pass next_offset as offset.
Get an invoiceeboekhouden_get_invoice
One invoice with its items, amounts and relation.
List outstanding invoiceseboekhouden_list_outstanding_invoices
Open (unpaid) invoices: debtors (D, sales invoices customers still owe) or creditors (C, purchase invoices still to be paid). Paged: pass next_offset as offset.
List or search mutations (bookings)eboekhouden_list_mutations
Search the bookkeeping mutations: type 1 invoice received, 2 invoice sent, 3 invoice payment received, 4 invoice payment sent, 5 money received, 6 money sent, 7 general journal entry. Filter by type, mutation number, description, invoice number or date. Paged: pass next_offset as offset.
Get a mutation (booking)eboekhouden_get_mutation
One mutation with its rows (ledger, VAT code, amount, relation, invoice number).
List ledgers (chart of accounts)eboekhouden_list_ledgers
The ledger accounts (grootboekrekeningen): id, code, description and category (BAL balance, VW profit and loss, FIN, DEB, CRED, AF6, AF19, AFOVERIG, VOOR, BTWRC, AF). Use the id as ledger_id in other tools. Paged: pass next_offset as offset.
Get a ledgereboekhouden_get_ledger
One ledger account.
Get a ledger's balanceeboekhouden_get_ledger_balance
The balance of one ledger, optionally per cost center and for a period (from/to).
List all ledger balanceseboekhouden_list_ledger_balances
The balances of all ledgers (a trial balance), optionally per cost center and for a period (from/to).
List productseboekhouden_list_products
List products and services (articles) with price, VAT code, ledger and unit, optionally by code or group code. Paged: pass next_offset as offset.
Get a producteboekhouden_get_product
One product with price, VAT code, ledger, unit and stock setting.
List product groupseboekhouden_list_product_groups
All product groups.
List cost centerseboekhouden_list_cost_centers
List cost centers (kostenplaatsen), optionally by parent id or description. Paged: pass next_offset as offset.
Get a cost centereboekhouden_get_cost_center
One cost center.
List unitseboekhouden_list_units
List product units (piece, hour, ...) with their ids. Paged: pass next_offset as offset.
List invoice templateseboekhouden_list_invoice_templates
List invoice templates (the template_id for eboekhouden_create_invoice), optionally by name, type (E editor, A advanced) or active. Paged: pass next_offset as offset.
List e-mail templateseboekhouden_list_email_templates
List e-mail templates. Paged: pass next_offset as offset.
List members (clubs and associations)eboekhouden_list_members
List members; only available to clubs and associations (others get error MEM_056). Paged: pass next_offset as offset.
Get a member (clubs and associations)eboekhouden_get_member
One member; only available to clubs and associations.

Changes data · 4

Create a relationeboekhouden_create_relation
Create a new relation (customer or supplier) in the administration. Only name is required; the code is generated when omitted. Returns the new id and code.
Update a relationeboekhouden_update_relation
Change fields of an existing relation. The tool first reads the relation, then sends its current values with your changes on top (the API requires name on every update), so fields you do not pass keep their values. This overwrites the current values of the fields you pass. GET + PATCH /v1/relation/{id}.
Create a producteboekhouden_create_product
Create a product or service. Needs code, description, a sale VAT code and a ledger id, and exactly one of price_excl or price_incl. Returns the new id.
Create an invoiceeboekhouden_create_invoice
Create a sales invoice for a relation. PERMANENT: the API cannot change or delete invoices afterwards, and an invoice number is used up. The invoice is created only: it is NOT e-mailed to the customer, NOT booked as a mutation and no direct debit is set. Needs relation_id, template_id (eboekhouden_list_invoice_templates), term_of_payment in days and at least one item with a ledger_id. Returns the new id and invoice number.

Your usefulapi plan · 4

Usage status (free-tier meter)eboekhouden_usage_status
Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter.
Request a missing featureeboekhouden_request_feature
Tell usefulapi that the user needs something the e-Boekhouden tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter.
Upgrade to Pro or Pro+eboekhouden_upgrade
Get a paid plan for e-Boekhouden (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter.
Cancel the Pro subscriptioneboekhouden_cancel_subscription
Cancel the caller's e-Boekhouden Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run eboekhouden_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with e-Boekhouden in Claude or ChatGPT?

See which invoices are still unpaid. Find the invoices created for a customer. Check ledger balances for a period. Review bookings of a type. Add or update a customer or supplier. See what you can do for the details.

Is this an official e-Boekhouden product?

No. usefulapi is an independent service. It is not affiliated with or endorsed by e-Boekhouden. The server calls the e-Boekhouden API with your own e-Boekhouden access, so it sees only the data that your account can see.

Can I connect e-Boekhouden to Claude or ChatGPT?

Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.

What do I need to connect?

The login page asks for your e-Boekhouden API token and Your e-Boekhouden site. See Before you connect for where to find them.

Do I put my e-Boekhouden key or an Authorization header in the client config?

No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your e-Boekhouden API token and Your e-Boekhouden site. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

How do you keep my e-Boekhouden credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the e-Boekhouden API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in e-Boekhouden.

Can the AI change my e-Boekhouden data?

Yes, if you approve it. 4 of the 25 e-Boekhouden tools can create or change data. The other 21 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.

What does it cost?

The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this e-Boekhouden server only. Cancel any time: your paid plan then runs to the end of the paid period. Run eboekhouden_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run eboekhouden_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run eboekhouden_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a e-Boekhouden tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with eboekhouden_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.

Which AI clients can I use?

Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.

Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.

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