Fiken logo Fiken automation · runs weekly

Book Fiken receipts and supplier invoices as purchases

Receipts pile up in the Innboks, and each one needs a supplier, a date, an amount, a cost account and a VAT choice before it counts in the books.

Cotlet does it in your own Fiken account with list_inbox, list_contacts, create_contact, list_purchases and create_purchase, called by your AI agent, an n8n workflow or a script.

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Hosted · nothing to install or maintain

Can Fiken do this on its own?

Fiken proposes supplier, date, amount, account and VAT from an uploaded document, but a person still checks and registers each purchase (checked 14 Oct 2026). Automatic purchase registration only covers EHF invoices from a supplier that already has a rule, and the API endpoints for purchases and the inbox need the 99 NOK per month module.

How you do it in Fiken today

  1. Upload the document to Innboks, or take a photo with the Fiken mobile app; create a new purchase straight from the document, or start at Kjøp → Nytt kjøp.
  2. Choose Et kjøp fra leverandør or Et kontantkjøp; Fiken suggests the supplier from the document, or you create a new one, with a lookup in Brønnøysundregistrene for Norwegian companies.
  3. Check Fakturadato, Fakturanummer and Forfallsdato. Fiken usually reads the date and the amount and proposes a cost account and VAT, and you add the Tekst.
  4. Pick the Kostnadskonto, enter the Bruttobeløp and the Mva if the company is VAT-registered; use del beløpet over flere kontoer to split a document.
  5. Mark it as paid (Bankkonto, Kontanter, Utlegg or Annet) or leave it unpaid, then click Registrer kjøp. An unpaid one is paid later under Kjøp → Kjøpsoversikt with Registrer ny betaling.

How to book Fiken receipts and supplier invoices as purchases

Prompt

Go through the unused documents in my Fiken inbox. Book each one as a purchase with the supplier, date, amount and VAT from the document, use the cost accounts from my list, and leave anything unclear for me.
  1. 01

    Take the unused documents

    list_inbox runs with status unused, so documents already used as documentation for a purchase are left alone. For a receipt the agent holds as a file, upload_receipt puts it in the inbox first.

  2. 02

    Read each document

    The agent opens the document link from list_inbox and reads supplier, date, invoice number and gross amount with VAT. A blurry photo or a total it cannot read goes on your list instead of being guessed.

  3. 03

    Match the supplier

    list_contacts looks up the supplier by organisation number or name. A new supplier is created with create_contact when the document names it; a card or cash receipt with no supplier is booked as a cash purchase (kontantkjøp).

  4. 04

    Use your account rules, never a guess

    The cost account comes from the list in your prompt, for example train tickets to one account and software to another. A document with no matching rule is left for you, because the account decides how the cost is reported.

  5. 05

    Skip duplicates, then register

    Before booking, list_purchases is searched for the same supplier and invoice number, the check Fakturanummer exists for. create_purchase then books the purchase with the document attached and the payment you named.

What you get back

Example data

Inbox documents waiting: 9
Booked 6 purchases, e.g. Kontorbutikken AS, 1,250 NOK gross (net 1,000, VAT 250), paid from the business account
Skipped 1 as duplicate: invoice 88213 is already booked
Left for you 2: a blurry photo, and a hotel bill with no account rule

Other ways to ask

  • Book only documents from Kontorbutikken AS and leave everything else in the inbox.
  • Every Friday, list inbox documents older than 7 days that are still unused, and book none of them.
  • Book these receipts as cash purchases (kontantkjøp) paid from the card account, and split the hotel bill between accommodation and meals.
  • Upload the PDFs in this folder to the inbox and book the ones from suppliers we already have.

What Fiken allows, and what to know first

  • Documents in Fiken's Innboks are not deleted when you delete a purchase or a purchase draft.
  • A booked purchase cannot be edited directly: Fiken cancels the booking and creates a new draft (Slett handel og lag nytt utkast), or you remove it with Angre kjøpsregistrering.
  • A purchase can be split over several cost accounts or VAT rates with del beløpet over flere kontoer.
  • For a VAT-registered company the purchase has an Mva choice; for some costs, such as account 5990 Annen personalkostnad, the help center says to choose Ingen.
  • The payment options on a purchase are Bankkonto, Kontanter, Utlegg (paid by you personally) and Annet (loan or rounding).

create_purchase asks for your OK by default. To run it weekly without you, switch confirmation off for that tool in your dashboard.

Sources: Fiken Help: Registrere kjøp og utgifter · Fiken Help: Rette eller slette et kjøp du har registrert feil · Fiken Help: Automatisk kjøpsregistrering · Fiken Help: Fiken-appen til mobil

Call create_purchase from a script

curl

curl -X POST https://cotlet.dev/api/v1/fiken/purchases \
  -H "Authorization: Bearer $COTLET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"kind":"supplier","supplier_id":6120455,"date":"2026-10-09","invoice_number":"88214","due_date":"2026-10-23","lines":[{"description":"Printer paper and toner","gross_amount":1250,"vat_type":"HIGH","expense_account":"6800"}],"paid_from":"bank_account","bank_account":"1920:10001","payment_date":"2026-10-09","inbox_document_id":3318240}'

Example response

{
  "purchase_id": 8820145,
  "kind": "supplier",
  "supplier": "Kontorbutikken AS",
  "date": "2026-10-09",
  "invoice_number": "88214",
  "net": 1000,
  "vat": 250,
  "gross": 1250,
  "currency": "NOK",
  "paid": true,
  "balance": 0,
  "document_attached": true
}

MCP: add https://cotlet.dev/mcp/v1 with the same key; the call is fiken_write → create_purchase. Example data.

Schedule it in n8n, Make, Zapier or cron

Fiken tools this automation uses

Cotlet Fiken tools used to book Fiken receipts and supplier invoices as purchases
Tool Parameters
list_inbox status, name, limit, cursor
list_contacts search, role, limit, cursor
create_contact name, role, email, organisation_number, phone_number
list_purchases paid, from, to, supplier_id, limit, cursor
create_purchase kind, supplier_id, date, invoice_number, due_date, lines, paid_from, bank_account, payment_date, inbox_document_id, currency
All 14 Fiken tools with descriptions

Frequently asked questions

Is it safe to connect Fiken to Cotlet?

Yes. You sign in to Fiken yourself, in your own Cloud Browser in the EU, and we never save your password. Your agents only get Fiken once you enable it, every background request is listed, and the browser profile is stored encrypted with AES-256-GCM, the cipher 1Password uses for its vaults. The AI model never sees a login, posts and messages wait for your OK, and Disable for agents cuts access in one click. Independent scanners grade cotlet.dev A+ on Qualys SSL Labs, securityheaders.com and Mozilla Observatory; live results are on https://cotlet.dev/security.

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