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Connectors · Accounting & finance

Fortnox MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Fortnox and the rest of your systems. It gives your agent 410 Fortnox actions (159 reads, 194 writes and 57 that wait for a confirmation) and holds the Fortnox credential itself, so the agent never does. It paces Fortnox's limits and records every call. Connecting Fortnox needs your own Fortnox OAuth app and one admin sign-in.

Connect Fortnox freeSee pricing

100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you.

claude mcp add --transport http actionlake https://connect.actionlake.com/mcp
the first call
do {  action: "fortnox.invoices.list",  intent: "check which Fortnox account is connected"}# Retrieve a list of invoices · read · 1 upstream call
  • 410actionsin one signed file
  • 159readlook, never change
  • 194writecreate and update
  • 57wait for a yesdestructive, confirmed first

Set up

Connect Fortnox in three steps.

  1. 01

    Add actionlake to Claude.

    Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us.

    https://connect.actionlake.com/mcp
  2. 02

    Connect Fortnox.

    OAuth 2.0, authorization code. You register your own OAuth app with Fortnox, an admin signs in once, and you paste the app's client id and secret and the tokens from that sign-in; actionlake renews the access token from then on. actionlake stores what you paste write-only, sealed under your tenant's key.

    Before the first sign-in, Fortnox needs an OAuth app of your own, registered in its developer portal. actionlake has no Fortnox app to lend you.

    • access_tokenAccess token from one sign-in with your own OAuth app
    • refresh_tokenRefresh token from the same sign-in; the access token is renewed from it
    • client_idFortnox integration Client ID, from the Fortnox Developer Portal (developer.fortnox.se) app registration, with the…
    • client_secretFortnox integration Client Secret, from the same app registration
    account { op: "connections.requirements", service: "fortnox" }
# free: exactly what to paste, and what is found for you
  3. 03

    Make the first call. Check before a write.

    Ask in plain words; Claude picks the action. Before anything changes, check validates the call and prices it, for free.

    do    { action: "fortnox.invoices.list" }# retrieve a list of invoices · read · 1 upstream callcheck { action: "fortnox.invoices.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

Fortnox at a glance

Sign-in
OAuth 2.0, authorization code. You register your own OAuth app with Fortnox, an admin signs in once, and you paste the app's client id and secret and the tokens from that sign-in; actionlake renews the access token from then on.
You provide
access_tokenrefresh_tokenclient_idclient_secret
Limits we pace to
25 calls per 5 seconds, per connection
API covered
Fortnox API v3 plus the /api warehouse, time, recurring-billing and file-attachment services (OpenAPI 3.0.3)api.fortnox.se
Built from
Fortnox's documentation, read 23 October 2026apps.fortnox.sefortnox.se
Service file
Version 1.0.0, signed (Ed25519)
Cached reads
159 of 159 reads, for up to 5 minutes; a write clears what it affects
Shared entities
12, so ask can line Fortnox up with your other systems
Data
Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in Fortnox.

410 actions in 89 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

  • 159readlook, never change
  • 194writecreate and update
  • 57destructivewait for a confirmation

  1. Warehouse purchaseorders

    14

    4 read · 9 write · 1 destructive

    List Purchase Orders · Create Purchase Order · Get Purchase Order · Update Purchase Order

  2. Assets

    12

    3 read · 8 write · 1 destructive

    Create an Asset · Retrieve a list of assets · Retrieve a single asset · Update an Asset

  3. Invoices

    12

    2 read · 9 write · 1 destructive

    Retrieve a list of invoices · Create an invoice · Retrieve a single invoice · Update an invoice

  4. Invoices V2

    12

    2 read · 9 write · 1 destructive

    Create an invoice · Credit an invoice · Send an invoice as e-invoice · Send an invoice as email

  5. Offers

    9

    2 read · 6 write · 1 destructive

    Retrieve a list of offers · Create an offer · Retrieve a single offer · Update an offer

  6. Offers V2

    9

    2 read · 6 write · 1 destructive

    Create an offer · Create invoice out of given offer · Create order out of given offer · Send given offer as email

  7. Supplierinvoices

    9

    2 read · 6 write · 1 destructive

    Retrieve a list of supplier invoices · Create a supplier invoice · Retrieve a single supplier invoice · Update a supplier invoice

  8. Warehouse stocktaking

    9

    3 read · 4 write · 2 destructive

    Add rows by filter · Create stock taking · List stock takings · Get candidate rows

81 more areas · 324 actions
  • Orders 8
  • Orders V2 8
  • Prices 8
  • Warehouse incominggoods 8
  • Warehouse productionorders 8
  • Contracts 7
  • Noxfinansinvoices 7
  • Absencetransactions 6
  • Articles V2 6
  • Attachments 6
  • Attendancetransactions 6
  • Invoicepayments 6
  • Supplierinvoicepayments 6
  • Warehouse inbound deliveries 6
  • Warehouse outbound deliveries 6
  • Warehouse stockpoints 6
  • Accounts 5
  • Articles 5
  • Articleurlconnections 5
  • Assets types 5
  • Contractaccruals 5
  • Costcenters 5
  • Currencies 5
  • Customerreferences 5
  • Customers 5
  • Invoiceaccruals 5
  • Modesofpayments 5
  • Projects 5
  • Recurrings 5
  • Salarytransactions 5
  • Supplierinvoiceaccruals 5
  • Taxreductions 5
  • Termsofpayments 5
  • Units 5
  • Vouchers 5
  • Warehouse stocktransfer 5
  • Wayofdeliveries 5
  • Articlefileconnections 4
  • Contracttemplates 4
  • Employees 4
  • Labels 4
  • Pricelists 4
  • Supplierinvoiceexternalurlconnections 4
  • Supplierinvoicefileconnections 4
  • Suppliers 4
  • Termsofdeliveries 4
  • Voucherfileconnections 4
  • Voucherseries 4
  • Warehouse custom inbound documents 4
  • Warehouse custom outbound documents 4
  • Warehouse stocktaking rows 4
  • Archive 3
  • Assetfileconnections 3
  • Emailsenders 3
  • Expenses 3
  • Financialyears 3
  • Predefinedaccounts 3
  • Predefinedvoucherseries 3
  • Recurring invoice requests 3
  • Scheduletimes 3
  • Supplierinvoice comments 3
  • Warehouse custom document types 3
  • Inbox 2
  • Recurring deviations 2
  • Warehouse stock locations 2
  • Accountcharts 1
  • Company settings 1
  • Companyinformation 1
  • Developer ratings 1
  • Developer sales 1
  • Developer users 1
  • Euvatlimitregulation 1
  • Locked period 1
  • Me 1
  • Printtemplates 1
  • Time article registrations 1
  • Time registrations 1
  • Vacationdebtbasis 1
  • Warehouse deliveries 1
  • Warehouse stock balance 1
  • Warehouse tenant 1

Top actions

The Fortnox API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 96 of Fortnox's 96 action names are shared with at least one other connector, so an agent learns them once.

ActionWhat it doesEffectSame name in
fortnox.invoices.listRetrieve a list of invoicesRetrieve a list of invoices.readfinance.invoice.list101 connectors
fortnox.invoicepayments.listRetrieve a list of invoice paymentsRetrieve a list of invoice payments.readfinance.payment.list75 connectors
fortnox.offers.listRetrieve a list of offersRetrieve a list of offers.readfinance.quote.list52 connectors
fortnox.accounts.listList all accountsList all accounts.readfinance.ledger_account.list36 connectors
fortnox.supplierinvoices.listRetrieve a list of supplier invoicesRetrieve a list of supplier invoices.readfinance.bill.list31 connectors
fortnox.articles.listRetrieve a list of articlesRetrieve a list of articles.readcommerce.product.list112 connectors
fortnox.orders.listRetrieve a list of ordersRetrieve a list of orders.readcommerce.order.list82 connectors
fortnox.invoices.createCreate an invoiceCreate an invoice.writefinance.invoice.create74 connectors
fortnox.invoicepayments.createCreate an invoice paymentCreate an invoice payment.writefinance.payment.create67 connectors
fortnox.customers.listRetrieve a list of customersRetrieve a list of customers.readcrm.company.list162 connectors
fortnox.offers.createCreate an offerCreate an offer.writefinance.quote.create52 connectors
fortnox.invoicepayments.deleteRemove an invoice paymentRemove an invoice payment.destructivefinance.payment.delete37 connectors

Try it

Prompts to paste into Claude.

Each one names the Fortnox actions it will call, so you know what it reads and what it changes before you send it.

  1. Readread

    Which Fortnox invoices are more than 30 days overdue? Group them by customer with the total owed.

    callsfortnox.invoices.list

  2. Writewrite

    Create an invoice in Fortnox. Show me exactly what you will send before you save it.

    callsfortnox.invoices.create

  3. Across systemsread

    For each customer, how many invoices are in Fortnox and how many tickets in ConnectWise PSA?

    callsfortnox.invoices.listconnectwise_manage.tickets.list

Across your systems

Fortnox, joined to the rest of your business.

One ask fetches from Fortnox and another system, joins the rows on the same customer on our side, and hands your agent the answer, not every row.

  • For each customer, how many invoices are in Fortnox and how many tickets in ConnectWise PSA?

    fortnox.invoices.list + connectwise_manage.tickets.list, on crm.company · ConnectWise PSA

  • For each customer, how many invoices are in Fortnox and how many tickets in HubSpot CRM?

    fortnox.invoices.list + hubspot_crm.tickets.list, on crm.company · HubSpot CRM

Also mapped by other connectorscrm.company 227identity.current_user 142work.project 116commerce.product 109finance.invoice 91commerce.order 86hr.employee 63finance.payment 53
ask
ask {  intent: "for each customer, how many invoices are in Fortnox and how many tickets in ConnectWise PSA",  steps: [    { action: "fortnox.invoices.list", as: "inv", input: {}, limit: 100, max_pages: 5 },    { action: "connectwise_manage.tickets.list", as: "tix", input: {}, limit: 100, max_pages: 5 },    { join: {        left: "inv",        right: "tix",        on: "crm.company",        group_by: "inv.company_name",        select: ["inv.company_name", "count(inv.id) as invoices", "count(tix.id) as tickets"]    } }  ]}
Example. Run it through check first: it validates the steps and prices them, and it is free.

Governance for Fortnox

Destructive actions wait for a yes.

57 Fortnox actions are destructive. The first 10:

  • Remove an invoice paymentfortnox.invoicepayments.delete
  • Deletes an accountfortnox.accounts.delete
  • Delete an articlefortnox.articles.delete
  • Delete a customerfortnox.customers.delete
  • Remove a projectfortnox.projects.delete
  • Remove a mode of paymentfortnox.modesofpayments.delete
  • Remove a currencyfortnox.currencies.delete
  • Remove a cost centerfortnox.costcenters.delete
  • Remove a term of paymentfortnox.termsofpayments.delete
  • Delete or Void an Assetfortnox.assets.delete

A destructive action runs only with confirm: true. Under the human policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after.

dofortnox.invoicepayments.deleteconfirm_policy: human

Remove an invoice payment?

intent: the user asked me to remove an invoice payment

run suspended · waiting for a named person · key fortnox-agent cannot confirm itself
In the console, or from an emailed signed link.
a key for this connector
account {  op: "keys.create", name: "fortnox-agent",  allowed_actions: ["fortnox.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "fortnox.invoicepayments.delete", approver: "[email protected]" },    { match: "fortnox.accounts.delete", approver: "[email protected]" },    { match: "fortnox.articles.delete", approver: "[email protected]" }  ]}
Illustrative. Scoped to Fortnox only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What Fortnox costs on actionlake.

Every Fortnox action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call Fortnox refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

  • 1upstream call per actionall 410 Fortnox actions
  • 410actions pageeach page of a long list is one call
  • 159reads can be cacheda cache hit costs nothing
  • 100,000calls a month, freepaid plans from US$49 a month for 250,000

See pricing

Action index

Every Fortnox action.

410 actions by area: the id your agent calls, what it does, and its effect.

Warehouse purchaseorders14
  • fortnox.warehouse_purchaseorders.createCreate Purchase Orderwrite
  • fortnox.warehouse_purchaseorders.getGet Purchase Orderread
  • fortnox.warehouse_purchaseorders.listList Purchase Ordersread
  • fortnox.warehouse_purchaseorders.updateUpdate Purchase Orderwrite
  • fortnox.warehouse_purchaseorders.completeManually complete Purchase Orderwrite
  • fortnox.warehouse_purchaseorders.dropship_completeManually complete dropship orderwrite
  • and 8 more in this area
Assets12
  • fortnox.assets.createCreate an Assetwrite
  • fortnox.assets.getRetrieve a single assetread
  • fortnox.assets.listRetrieve a list of assetsread
  • fortnox.assets.updateUpdate an Assetwrite
  • fortnox.assets.change_opening_balanceChange manual OB value of an Assetwrite
  • fortnox.assets.deleteDelete or Void an Assetdestructive
  • and 6 more in this area
Invoices12
  • fortnox.invoices.createCreate an invoicewrite
  • fortnox.invoices.getRetrieve a single invoiceread
  • fortnox.invoices.listRetrieve a list of invoicesread
  • fortnox.invoices.updateUpdate an invoicewrite
  • fortnox.invoices.bookkeepBookkeep an invoicewrite
  • fortnox.invoices.cancelCancel an invoicedestructive
  • and 6 more in this area
Invoices V212
  • fortnox.invoices_v2.createCreate an invoicewrite
  • fortnox.invoices_v2.creditCredit an invoicewrite
  • fortnox.invoices_v2.einvoiceSend an invoice as e-invoicewrite
  • fortnox.invoices_v2.emailSend an invoice as emailwrite
  • fortnox.invoices_v2.bookkeepBookkeep an invoicewrite
  • fortnox.invoices_v2.cancelCancel an invoicedestructive
  • and 6 more in this area
Offers9
  • fortnox.offers.createCreate an offerwrite
  • fortnox.offers.getRetrieve a single offerread
  • fortnox.offers.listRetrieve a list of offersread
  • fortnox.offers.updateUpdate an offerwrite
  • fortnox.offers.cancelCancels given offerdestructive
  • fortnox.offers.createinvoiceCreate invoice out of given offerwrite
  • and 3 more in this area
Offers V29
  • fortnox.offers_v2.createCreate an offerwrite
  • fortnox.offers_v2.createinvoiceCreate invoice out of given offerwrite
  • fortnox.offers_v2.createorderCreate order out of given offerwrite
  • fortnox.offers_v2.emailSend given offer as emailwrite
  • fortnox.offers_v2.cancelCancels given offerdestructive
  • fortnox.offers_v2.externalprintSet given offer as sentwrite
  • and 3 more in this area
Supplierinvoices9
  • fortnox.supplierinvoices.createCreate a supplier invoicewrite
  • fortnox.supplierinvoices.getRetrieve a single supplier invoiceread
  • fortnox.supplierinvoices.listRetrieve a list of supplier invoicesread
  • fortnox.supplierinvoices.updateUpdate a supplier invoicewrite
  • fortnox.supplierinvoices.approve_bookkeepApproval of bookkeep of given supplier invoicewrite
  • fortnox.supplierinvoices.approve_paymentApproval of payment of given supplier invoicewrite
  • and 3 more in this area
Warehouse stocktaking9
  • fortnox.warehouse_stocktaking.add_rowsAdd rows by filterwrite
  • fortnox.warehouse_stocktaking.createCreate stock takingwrite
  • fortnox.warehouse_stocktaking.listList stock takingsread
  • fortnox.warehouse_stocktaking.list_candidatesGet candidate rowsread
  • fortnox.warehouse_stocktaking.deleteDelete Stock Taking documentdestructive
  • fortnox.warehouse_stocktaking.getGet Stock Taking documentread
  • and 3 more in this area
Orders8
  • fortnox.orders.createCreate a new orderwrite
  • fortnox.orders.getRetrieve a single orderread
  • fortnox.orders.listRetrieve a list of ordersread
  • fortnox.orders.updateUpdate an orderwrite
  • fortnox.orders.cancelCancels given orderdestructive
  • fortnox.orders.createinvoiceCreate invoice out of given orderwrite
  • and 2 more in this area
Orders V28
  • fortnox.orders_v2.createCreate a new orderwrite
  • fortnox.orders_v2.createinvoiceCreate invoice out of given orderwrite
  • fortnox.orders_v2.emailSend given order as emailwrite
  • fortnox.orders_v2.listRetrieve a list of ordersread
  • fortnox.orders_v2.cancelCancels given orderdestructive
  • fortnox.orders_v2.externalprintSet given order as sentwrite
  • and 2 more in this area
Prices8
  • fortnox.prices.createCreate a pricewrite
  • fortnox.prices.getRetrieve the first price for the specified articleread
  • fortnox.prices.get_by_quantityRetrieve a price for a specified articleread
  • fortnox.prices.list_for_articleRetrieve a list of articles with all their prices in the specified price listread
  • fortnox.prices.deleteDelete a single pricedestructive
  • fortnox.prices.get_defaultRetrieve a list of pricesread
  • and 2 more in this area
Warehouse incominggoods8
  • fortnox.warehouse_incominggoods.completeComplete Incoming Goods documentwrite
  • fortnox.warehouse_incominggoods.createCreate Incoming Goods documentwrite
  • fortnox.warehouse_incominggoods.getGet Incoming Goods documentread
  • fortnox.warehouse_incominggoods.listList Incoming Goods Documentsread
  • fortnox.warehouse_incominggoods.patchPartial update Incoming Goods documentwrite
  • fortnox.warehouse_incominggoods.releaseRelease Incoming Goods documentwrite
  • and 2 more in this area
Warehouse productionorders8
  • fortnox.warehouse_productionorders.createCreate a new production orderwrite
  • fortnox.warehouse_productionorders.getGet Production Order documentread
  • fortnox.warehouse_productionorders.listList production ordersread
  • fortnox.warehouse_productionorders.updateUpdate a production orderwrite
  • fortnox.warehouse_productionorders.get_bill_of_materialsGet the package items (Bill Of Materials, BOMs) for a production articleread
  • fortnox.warehouse_productionorders.patchUpdate the note of a production orderwrite
  • and 2 more in this area
Contracts7
  • fortnox.contracts.createCreate a contractwrite
  • fortnox.contracts.createinvoiceCreate invoice from contractwrite
  • fortnox.contracts.finishSet a contract as finishedwrite
  • fortnox.contracts.listRetrieve a list of contractsread
  • fortnox.contracts.getRetrieve a single contractread
  • fortnox.contracts.increaseinvoicecountIncreases the invoice count without creating an invoicewrite
  • and 1 more in this area
Noxfinansinvoices7
  • fortnox.noxfinansinvoices.createSend an invoice with Fortnox Finanswrite
  • fortnox.noxfinansinvoices.getRetrieve a single invoice paymentread
  • fortnox.noxfinansinvoices.pauseAction Pausewrite
  • fortnox.noxfinansinvoices.report_paymentAction Report Paymentwrite
  • fortnox.noxfinansinvoices.stopAction Stopwrite
  • fortnox.noxfinansinvoices.take_feesAction Take Feeswrite
  • and 1 more in this area
Absencetransactions6
  • fortnox.absencetransactions.createCreate a new absence transactionwrite
  • fortnox.absencetransactions.getRetrieve a specific absence transactionread
  • fortnox.absencetransactions.listLists all absence transactionsread
  • fortnox.absencetransactions.list_by_date_codeRetrieve absence transactionsread
  • fortnox.absencetransactions.deleteDelete an absence transactiondestructive
  • fortnox.absencetransactions.updateUpdate a single absence transactionwrite
Articles V26
  • fortnox.articles_v2.calculate_bundle_pricesCalculate the prices of all included articles in a bundleread
  • fortnox.articles_v2.createCreate an articlewrite
  • fortnox.articles_v2.getRetrieve an articleread
  • fortnox.articles_v2.listRetrieve a list of articlesread
  • fortnox.articles_v2.deleteDelete an articledestructive
  • fortnox.articles_v2.updateUpdate an articlewrite
Attachments6
  • fortnox.attachments.countList number of attachmentsread
  • fortnox.attachments.createAttach files to one or more entitieswrite
  • fortnox.attachments.listGet attached files on an entityread
  • fortnox.attachments.validate_included_on_sendValidates a list of attachments that will be included on sendwrite
  • fortnox.attachments.deleteDetach filedestructive
  • fortnox.attachments.updateUpdate attachmentwrite
Attendancetransactions6
  • fortnox.attendancetransactions.createCreate a new attendance transactionwrite
  • fortnox.attendancetransactions.getRetrieve a specific attendance transactionread
  • fortnox.attendancetransactions.listLists all attendance transactionsread
  • fortnox.attendancetransactions.list_by_date_codeRetrieve attendance transactionsread
  • fortnox.attendancetransactions.deleteDelete an attendance transactiondestructive
  • fortnox.attendancetransactions.updateUpdate a single attendance transactionwrite
Invoicepayments6
  • fortnox.invoicepayments.createCreate an invoice paymentwrite
  • fortnox.invoicepayments.getRetrieve a single invoice paymentread
  • fortnox.invoicepayments.listRetrieve a list of invoice paymentsread
  • fortnox.invoicepayments.updateUpdate an invoice paymentwrite
  • fortnox.invoicepayments.bookkeepBookkeep an invoice paymentwrite
  • fortnox.invoicepayments.deleteRemove an invoice paymentdestructive
Supplierinvoicepayments6
  • fortnox.supplierinvoicepayments.bookkeepBookkeep a supplier invoice paymentwrite
  • fortnox.supplierinvoicepayments.createCreate a supplier invoice paymentwrite
  • fortnox.supplierinvoicepayments.getRetrieve a single supplier invoice paymentread
  • fortnox.supplierinvoicepayments.listRetrieve a list of supplier invoice paymentsread
  • fortnox.supplierinvoicepayments.deleteRemove a supplier invoice paymentdestructive
  • fortnox.supplierinvoicepayments.updateUpdate a supplier invoice paymentwrite
Warehouse inbound deliveries6
  • fortnox.warehouse_inbound_deliveries.createCreate manual inbound documentwrite
  • fortnox.warehouse_inbound_deliveries.getGet manual inbound documentread
  • fortnox.warehouse_inbound_deliveries.releaseRelease manual inbound documentwrite
  • fortnox.warehouse_inbound_deliveries.updateUpdate manual inbound documentwrite
  • fortnox.warehouse_inbound_deliveries.update_noteUpdate note on manual inbound documentwrite
  • fortnox.warehouse_inbound_deliveries.voidVoid manual inbound documentdestructive
Warehouse outbound deliveries6
  • fortnox.warehouse_outbound_deliveries.createCreate manual outbound documentwrite
  • fortnox.warehouse_outbound_deliveries.getGet manual outbound documentread
  • fortnox.warehouse_outbound_deliveries.releaseRelease manual outbound documentwrite
  • fortnox.warehouse_outbound_deliveries.updateUpdate manual outbound documentwrite
  • fortnox.warehouse_outbound_deliveries.update_noteUpdate note on manual outbound documentwrite
  • fortnox.warehouse_outbound_deliveries.voidVoid manual outbound documentdestructive
Warehouse stockpoints6
  • fortnox.warehouse_stockpoints.createCreate stock pointwrite
  • fortnox.warehouse_stockpoints.getGet stock pointread
  • fortnox.warehouse_stockpoints.listList stock pointsread
  • fortnox.warehouse_stockpoints.updateUpdate stock pointwrite
  • fortnox.warehouse_stockpoints.deleteDelete stock pointdestructive
  • fortnox.warehouse_stockpoints.list_by_idsGet stock pointsread
Accounts5
  • fortnox.accounts.createCreate an accountwrite
  • fortnox.accounts.getRetrieve an accountread
  • fortnox.accounts.listList all accountsread
  • fortnox.accounts.updateUpdate an accountwrite
  • fortnox.accounts.deleteDeletes an accountdestructive
Articles5
  • fortnox.articles.createCreate an articlewrite
  • fortnox.articles.getRetrieve an articleread
  • fortnox.articles.listRetrieve a list of articlesread
  • fortnox.articles.updateUpdate an articlewrite
  • fortnox.articles.deleteDelete an articledestructive
Articleurlconnections5
  • fortnox.articleurlconnections.createCreate an article url connectionwrite
  • fortnox.articleurlconnections.getRetrieve a single article url connectionread
  • fortnox.articleurlconnections.listRetrieve a list of article url connectionsread
  • fortnox.articleurlconnections.updateUpdate an article url connectionwrite
  • fortnox.articleurlconnections.deleteRemove an article url connectiondestructive
Assets types5
  • fortnox.assets_types.createCreate an asset typewrite
  • fortnox.assets_types.getRetrieve an asset typeread
  • fortnox.assets_types.listRetrieve a list of asset typesread
  • fortnox.assets_types.updateUpdate an asset typewrite
  • fortnox.assets_types.deleteDelete an asset typedestructive
Contractaccruals5
  • fortnox.contractaccruals.createCreate a contract accrualwrite
  • fortnox.contractaccruals.getRetrieve a single contract accrualread
  • fortnox.contractaccruals.listRetrieve a list of contract accrualsread
  • fortnox.contractaccruals.updateUpdate a contract accrualwrite
  • fortnox.contractaccruals.deleteRemove a contract accrualdestructive
Costcenters5
  • fortnox.costcenters.createCreate a cost centerwrite
  • fortnox.costcenters.getRetrieve a single cost centerread
  • fortnox.costcenters.listRetrieve a list of cost centersread
  • fortnox.costcenters.updateUpdate a cost centerwrite
  • fortnox.costcenters.deleteRemove a cost centerdestructive

Currencies 5Customerreferences 5Customers 5Invoiceaccruals 5Modesofpayments 5Projects 5Recurrings 5Salarytransactions 5Supplierinvoiceaccruals 5Taxreductions 5Termsofpayments 5Units 5Vouchers 5Warehouse stocktransfer 5Wayofdeliveries 5Articlefileconnections 4Contracttemplates 4Employees 4Labels 4Pricelists 4Supplierinvoiceexternalurlconnections 4Supplierinvoicefileconnections 4Suppliers 4Termsofdeliveries 4Voucherfileconnections 4Voucherseries 4Warehouse custom inbound documents 4Warehouse custom outbound documents 4Warehouse stocktaking rows 4Archive 3Assetfileconnections 3Emailsenders 3Expenses 3Financialyears 3Predefinedaccounts 3Predefinedvoucherseries 3Recurring invoice requests 3Scheduletimes 3Supplierinvoice comments 3Warehouse custom document types 3Inbox 2Recurring deviations 2Warehouse stock locations 2Accountcharts 1Company settings 1Companyinformation 1Developer ratings 1Developer sales 1Developer users 1Euvatlimitregulation 1Locked period 1Me 1Printtemplates 1Time article registrations 1Time registrations 1Vacationdebtbasis 1Warehouse deliveries 1Warehouse stock balance 1Warehouse tenant 1

This index shows a sample of each area. All 410 actions, with their inputs and prices, are in the catalogue, which a free sandbox key can search.

Questions

The Fortnox MCP server, answered.

Is there a Fortnox MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 410 Fortnox actions across warehouse purchaseorders, assets, invoices and invoices V2, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Fortnox.

What do I need to connect Fortnox?

Your own Fortnox OAuth app, registered with Fortnox (its client id and client secret), and the access and refresh tokens from one admin sign-in. actionlake has no Fortnox app of its own, so this is not a one-step consent. actionlake renews the access token as it expires. The free call account { op: "connections.requirements", service: "fortnox" } lists exactly what to paste.

Can an AI agent delete or change things in Fortnox?

Only if its key allows it, and only with an explicit confirmation. 57 Fortnox actions are destructive, including remove an invoice payment, deletes an account and delete an article. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it.

Will an AI agent use up my Fortnox API limit?

actionlake paces every call to the limits in the Fortnox service file: 25 calls per 5 seconds per connection. Repeated reads are answered from cache (159 Fortnox actions can be), which never reaches Fortnox.

What does a Fortnox action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (410 Fortnox actions page). Cache hits, searches, dry runs and calls Fortnox refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

Which Fortnox API does it cover?

The Fortnox API v3 plus the /api warehouse, time, recurring-billing and file-attachment services (OpenAPI 3.0.3) at api.fortnox.se. It is built from Fortnox's documentation as read on 23 October 2026. 410 actions in 89 areas, each one in the signed service file (version 1.0.0).

Can I combine Fortnox with my other systems?

Yes. ask joins Fortnox to ConnectWise PSA or HubSpot CRM on the same customer and returns the answer rather than every row. Fortnox maps crm.company, which 227 other connectors also map.

Does actionlake keep my Fortnox data, and where?

actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your Fortnox credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models.

Which AI clients can use it?

Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names.

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actionlake is independent. It is not made or endorsed by Fortnox; the name is the vendor's own. Counts are from the Fortnox service file, version 1.0.0.

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