Skills
skills/simonstrumse/vibelabs-skills/fiken

fiken

SKILL.md

Fiken Accounting Skill

Norwegian accounting API integration for Fiken (fiken.no). Covers invoices, credit notes, offers, contacts, products, payments, and account balances.

Setup

Detection Order

When this skill is activated, detect the Fiken configuration in this order:

  1. Centralized — Check if ~/.config/fiken-api/credentials.json exists
  2. Project-local — Check if FIKEN_API_TOKEN is set in the environment (via .env)
  3. No configuration — Run the First-Time Setup guide below

Using Existing Configuration

Centralized (~/.config/fiken-api/)

If ~/.config/fiken-api/credentials.json exists:

import { getFikenClient, listAccounts } from '~/.config/fiken-api/client.mjs'

// Default account
const fiken = getFikenClient()
const contacts = await fiken.getContacts()

// Specific account
const other = getFikenClient('account-name')

// List available accounts
const accounts = listAccounts()

The centralized client handles multi-account switching, auto-includes bank account numbers, and provides account-specific config (vatType, incomeAccount, etc.) via fiken.config.

Project-local (.env)

If FIKEN_API_TOKEN is in the environment:

require('dotenv').config();
const fiken = require('./skills/fiken/scripts/client');

The project-local client reads from environment variables:

FIKEN_API_TOKEN=...          # From Fiken > Innstillinger > API
FIKEN_COMPANY_SLUG=...       # Your company slug (from dashboard URL)

First-Time Setup

If no configuration is detected, guide the user through setup:

Step 1: Get an API token

  1. Log into fiken.no
  2. Go to Innstillinger > API
  3. Create a new API token (costs 99 NOK/month per company)
  4. Token format: {numeric-id}.{alphanumeric-key}

Step 2: Find your company slug

  • Look at your Fiken dashboard URL: https://fiken.no/foretak/{slug}/...
  • Or call GET https://api.fiken.no/api/v2/companies with the token to list all accessible companies

Step 3: Choose setup method

Use AskUserQuestion to ask the user:

  • Question: "How do you want to configure Fiken access?"
  • Option 1: Project-local (.env) — "Single project, single company. Simplest setup. Credentials in your project's .env file."
  • Option 2: Centralized (~/.config/fiken-api/) — "Multiple projects or companies. Credentials stored once in ~/.config/, used everywhere."

If project-local (.env):

  1. Create .env with FIKEN_API_TOKEN and FIKEN_COMPANY_SLUG
  2. Import from scripts/client.js (bundled with this skill)
  3. Verify with fiken.getContacts() or fiken.isFikenConfigured()

If centralized (~/.config/fiken-api/):

  1. Create ~/.config/fiken-api/credentials.json with account(s)
  2. Copy the centralized client to ~/.config/fiken-api/client.mjs
  3. Import via getFikenClient(accountName)
  4. Verify with fiken.getContacts()

Step 4: Initialize number series

  • The very first invoice, credit note, and offer of each type MUST be created manually in the Fiken web UI
  • This establishes the number series — after that, the API works
  • Direct link: https://fiken.no/foretak/{slug}/fakturautkast/ny

Step 5: Verify

  • Call getContacts() to confirm the token works
  • If 403 Forbidden: API module not activated (Fiken > Foretak > Tilleggstjenester)
  • If 401 Unauthorized: Bad token (regenerate at Fiken > Innstillinger > API)

Available Functions

Function Description
isFikenConfigured() Check if env vars are set
getContacts() List all contacts
findContactByOrgNumber(orgNr) Find contact by Norwegian org number
createContact(input) Create customer/supplier — returns contactId
getInvoices(page, pageSize) List invoices (paginated)
getInvoice(id) Get single invoice
createInvoiceDraft(input) Create draft — returns { draftId, uuid, draftUrl }
sendInvoiceDraft(draftId, sendInput) Two-step: finalize + dispatch — returns { invoiceId, saleId, invoiceUrl }
isInvoiceSettled(id) Check if invoice is paid
getProducts() List products/services
getAccounts() Chart of accounts (~475 accounts)
getBankAccounts() Bank accounts
nokToOre(nok) / oreToNok(ore) Currency conversion (1 NOK = 100 ore)
delay(ms) Rate limit helper (default 250ms)

Complete Invoice Example

require('dotenv').config();
const fiken = require('./skills/fiken/scripts/client');

// 1. Find or create contact
let contact = await fiken.findContactByOrgNumber('999888777');
if (!contact) {
  const contactId = await fiken.createContact({
    name: 'Example Company AS',
    email: 'post@example.no',
    organizationNumber: '999888777',
    address: {
      streetAddress: 'Storgata 1',
      city: 'Oslo',
      postCode: '0001',
      country: 'NO'
    },
    customer: true,
    supplier: false
  });
  contact = { contactId };
}

// 2. Create invoice draft
const draft = await fiken.createInvoiceDraft({
  type: 'invoice',                    // REQUIRED — see gotcha #5
  issueDate: '2026-03-01',
  daysUntilDueDate: 14,
  customerId: contact.contactId,
  ourReference: 'Your Name',
  yourReference: 'Their Contact',
  orderReference: 'PO-2026-001',      // Optional — for EHF routing
  invoiceText: 'Consulting services — March 2026',
  currency: 'NOK',
  // bankAccountNumber is auto-included by the client
  lines: [{
    description: 'Consulting — project planning, 8 hours',
    quantity: 8,
    unitPrice: fiken.nokToOre(1500),  // NOK 1,500/hr = 150000 ore
    vatType: 'HIGH',                  // 25% MVA (use 'OUTSIDE' if not MVA-registered)
    incomeAccount: '3020'             // Services, high MVA (use '3220' if not MVA-registered)
  }]
});
console.log('Draft URL:', draft.draftUrl);

// 3. Finalize + send as EHF (two-step process handled by the client)
await fiken.delay(500);
const invoice = await fiken.sendInvoiceDraft(draft.draftId, {
  method: ['ehf'],
  includeDocumentAttachments: true
});
console.log('Invoice ID:', invoice.invoiceId);   // Same as draftId
console.log('Sale ID:', invoice.saleId);          // Different — used for dashboard URLs
console.log('Invoice URL:', invoice.invoiceUrl);  // Uses saleId

VAT Quick Reference

Are you MVA-registered? This determines which vatType and income account to use.

Scenario vatType Income Account Account Name
MVA-registered, standard rate HIGH 3020 Tjenester, hoy mva-sats (25%)
MVA-registered, food/drink MEDIUM Account varies 15% rate
MVA-registered, zero-rated EXEMPT 3120 Tjenester, fritatt for mva
Not MVA-registered OUTSIDE 3220 Tjenester, unntatt for mva

Critical distinction:

  • "Fritatt" (3120, EXEMPT) = zero-rated, company IS in the MVA system but rate is 0%
  • "Unntatt" (3220, OUTSIDE) = exempt, company is NOT in the MVA system at all

Full VAT reference with all types and account compatibility: see references/vat-guide.md

Top 7 Critical Gotchas

1. VAT + Account must match

vatType and incomeAccount are linked. Using incompatible pairs returns 400. See the table above for correct combinations.

2. bankAccountNumber is REQUIRED on drafts

This is YOUR bank account number (the invoice sender's) — the "pay to" account printed on the invoice. It is NOT the customer's account.

The client auto-fetches it from GET /companies/{slug}/bankAccounts (picks first active account, caches in memory). If calling the API directly, you must include bankAccountNumber (Norwegian format, not IBAN). Without it: 500: "Kontonummer mangler på faktura". The API returns [{ bankAccountNumber, inactive }] — pick first where inactive === false.

3. Number series — first of each type must be manual

The very first invoice/credit note/offer MUST be created in the Fiken web UI to establish the number series. After that, the API works. Error: 400: "Missing number series for drafts of type: invoice.".

4. Money is in ore (1 NOK = 100 ore)

All monetary amounts use ore. NOK 4,998 → 499800. Use fiken.nokToOre() and fiken.oreToNok().

5. type field is REQUIRED on drafts

Values: invoice, cash_invoice, offer, order_confirmation, credit_note. Omitting returns: 400: "'type' er påkrevd".

6. PUT replaces all fields (not a PATCH)

Contact and product updates via PUT replace the entire resource. Always include all fields. The only PATCH is on invoices: newDueDate and sentManually only.

7. Invoice lines are immutable after finalization

Once sent, you can only change newDueDate and sentManually. To fix line items, issue a credit note and create a new invoice.

8. Invoice sending is a TWO-STEP process (CRITICAL)

Step 1: POST /invoices/drafts/{draftId}/createInvoice — NO body, just finalizes. Step 2: POST /invoices/send — dispatches (EHF/email/auto). Without Step 2, the invoice exists but was never sent. If you pass send params to Step 1, they are silently ignored.

9. Three different IDs per invoice

invoiceId (API operations) vs sale.saleId (dashboard URLs) vs sale.transactionId (accounting). draftId = invoiceId after finalization. The Location header from createInvoice returns saleId, NOT invoiceId.

10. Dashboard URLs use saleId, not invoiceId

Finalized invoice URL: /foretak/{slug}/handel/salg/{saleId} — NOT /faktura/{invoiceId}.

11. Use recipientEmail, not emailAddress

The send request field is recipientEmail. Using emailAddress is silently ignored.

All gotchas with error messages and solutions: see references/gotchas.md

Sending Methods

Method When to use
['ehf'] B2B to Norwegian companies (preferred)
['email'] Direct email delivery (requires recipientEmail)
['efaktura'] Norwegian consumer e-invoice via bank
['sms'] SMS delivery (requires mobileNumber)
['letter'] Physical letter (extra charge, Norway only)
['auto'] Fiken picks: EHF > eFaktura > SMS > Email

Multiple methods = priority list: ['sms', 'email'] tries SMS first, falls back to email.

Full sendInvoiceRequest:

{
  invoiceId: 12345,                    // Required
  method: ['ehf'],                     // Required — array of strings
  includeDocumentAttachments: true,    // Required
  recipientName: 'Name',              // Optional
  recipientEmail: 'email@x.no',       // Optional (for email method)
  emailSendOption: 'auto',            // 'document_link' | 'attachment' | 'auto'
  mergeInvoiceAndAttachments: false,   // Merge into single PDF
  organizationNumber: '999888777',     // Optional (for EHF)
  mobileNumber: '12345678',           // Optional (for SMS)
  message: 'Additional message text'  // Optional — included in email/notification
}

Dashboard URL Formats

Draft:       https://fiken.no/foretak/{slug}/fakturautkast/{uuid}
Invoice:     https://fiken.no/foretak/{slug}/handel/salg/{saleId}
Contact:     https://fiken.no/foretak/{slug}/kontakt/{contactId}
Credit Note: https://fiken.no/foretak/{slug}/kreditnota/{creditNoteId}
  • Domain: fiken.no (NOT app.fiken.no)
  • Draft path: fakturautkast (ONE word)
  • Drafts use UUID, not numeric ID (must GET the draft after creation)
  • Finalized invoices use saleId (from invoice.sale.saleId), NOT invoiceId
  • The API does NOT return dashboard links — construct them from sale.saleId

Pagination

Header Description
Fiken-Api-Page Current page (0-indexed)
Fiken-Api-Page-Size Items per page
Fiken-Api-Page-Count Total pages
Fiken-Api-Result-Count Total results

Default: page=0, pageSize=25. Maximum: pageSize=100.

API Limitations

  1. No webhooks — must poll for changes
  2. No recurring invoices — implement scheduling yourself
  3. No invoice reminders/dunning via API
  4. No Vipps payment integration via API
  5. Cannot modify invoice lines after finalization
  6. No direct payment on invoices — payments go through the underlying Sale object

Safe Testing Pattern

Drafts and products can be safely created and immediately deleted (204). This enables testing without permanent changes:

const draft = await fiken.createInvoiceDraft({ /* ... */ });
// inspect draft...
// DELETE /companies/{slug}/invoices/drafts/{draftId} → 204

API Reference

  • Base URL: https://api.fiken.no/api/v2
  • Auth: Authorization: Bearer {FIKEN_API_TOKEN}
  • Rate limit: 4 req/sec (250ms between calls)
  • Content type: application/json only
  • Dates: yyyy-MM-dd format
  • Attachments: .png, .jpeg, .jpg, .gif, .pdf only
  • Total endpoints: ~110
  • API cost: 99 NOK/month per company
  • Docs: https://api.fiken.no/api/v2/docs/

Reference Files

File Contents
references/api-endpoints.md All ~110 endpoints organized by category
references/workflows.md Multi-line invoices, credit notes, offers, products, contacts, payments
references/gotchas.md All 14 gotchas with error messages and solutions
references/vat-guide.md Complete VAT types, account matrix, MVA explanation
Weekly Installs
3
Repository
simonstrumse/vi…s-skills
First Seen
Feb 28, 2026
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