Read invoices, bills, contacts, ledger and bank balances; create drafts and contacts in Fiken. For Norwegian small businesses and bookkeepers who keep their accounts in Fiken. Hosted by usefulapi — connect from Claude, ChatGPT, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"fiken": {
"url": "https://fiken.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"fiken": {
"type": "http",
"url": "https://fiken.usefulapi.io/mcp"
}
}
}No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run these commands. The second one opens the login page:
Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
List the issued invoices that are not settled and have a due date in the past. Ask the assistant to sort them by customer and amount, then open one for details.
fiken_list_invoices fiken_get_invoice
List the purchases and supplier bills with their paid status. Ask which bills are still open, and open one purchase to see its lines and payments.
fiken_list_purchases fiken_get_purchase
Read the bank account balances for today or a past date. Compare them with the closing balance of chosen ledger accounts.
fiken_list_bank_accounts fiken_get_bank_balances fiken_get_account_balances
Search the contacts by name or organization number. Then list the invoices of that customer to see what you sold and what is still unpaid.
fiken_list_contacts fiken_get_contact fiken_list_invoices
Find the customer and the products. Create an invoice draft with the lines. The draft is not booked and not sent, so you can check it in Fiken first.
Changes data · fiken_list_contacts fiken_list_products fiken_create_invoice_draft
Create a contact marked as a customer. Add a product with a price and an income account, so both are ready for the next invoice.
Changes data · fiken_create_contact fiken_create_product
You sign in with your Fiken account and approve the access (OAuth). You do not need an API key.
This server reads your companies, contacts, invoices, purchases, sales, products, ledger and bank balances. It can create contacts, products and invoice drafts, and, only when you ask, issue an invoice from a draft and send an invoice to a customer (both cannot be undone). It never deletes anything. The company needs Fiken's API module (99 kr per month, ordered in Fiken under Innstillinger). You can revoke access any time in Fiken: Rediger konto, Sikkerhet, Apper du har gitt tilgang til.
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: you sign in with your Fiken account. 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.
Turn on the Fiken connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
fiken_get_user | read | Get the signed-in user The Fiken user this connection acts as (name and email). A cheap check that the sign-in works. Fiken: GET /user. |
fiken_list_companies | read | List companies The Fiken companies this connection can access, with their slug (needed as companySlug in every other tool), organization number and VAT type. Companies created after you approved access must be added under Fiken > Rediger konto > Sikkerhet > Apper du har gitt tilgang til. Fiken: GET /companies. |
fiken_get_company | read | Get a company One company: name, organization number, VAT type, address, accounting start date and whether the API module is active. Fiken: GET /companies/{companySlug}. |
fiken_list_accounts | read | List chart-of-accounts accounts The bookkeeping accounts (kontoplan) of the current year. Filter with range, e.g. "3000-3999, 1920". Fiken: GET /companies/{companySlug}/accounts. |
fiken_get_account_balances | read | Get account balances on a date Closing balance of every bookkeeping account on a date (amounts in cents). Fiken: GET /companies/{companySlug}/accountBalances. |
fiken_list_bank_accounts | read | List bank accounts The company's bank accounts as registered in Fiken. Fiken: GET /companies/{companySlug}/bankAccounts. |
fiken_get_bank_balances | read | Get bank balances Bank account balances, optionally on a given date (amounts in cents). Fiken: GET /companies/{companySlug}/bankBalances. |
fiken_list_contacts | read | List contacts (customers and suppliers) Customers and suppliers. Filter by name, organization number, email, customer/supplier flag or modification date. contactId in the result is the id other tools take as customerId/contactId. Fiken: GET /companies/{companySlug}/contacts. |
fiken_get_contact | read | Get a contact One customer or supplier with address, contact persons, notes and account codes. Fiken: GET /companies/{companySlug}/contacts/{contactId}. |
fiken_list_invoices | read | List issued invoices Issued (final) invoices with sale lines, amounts in cents and settled status. Filter by issue date, due date, customer and whether settled. Fiken: GET /companies/{companySlug}/invoices. |
fiken_get_invoice | read | Get an invoice One issued invoice with lines, customer, amounts in cents, settled status and payment/credit-note links. Fiken: GET /companies/{companySlug}/invoices/{invoiceId}. |
fiken_list_invoice_drafts | read | List invoice drafts Drafts of invoices, offers, order confirmations and credit notes that are not issued yet (a draft has a draftId, an invoice has an invoiceId). Fiken: GET /companies/{companySlug}/invoices/drafts. |
fiken_list_credit_notes | read | List credit notes Issued credit notes. Fiken: GET /companies/{companySlug}/creditNotes. |
fiken_list_offers | read | List offers Issued offers (tilbud). Fiken: GET /companies/{companySlug}/offers. |
fiken_list_order_confirmations | read | List order confirmations Issued order confirmations. Fiken: GET /companies/{companySlug}/orderConfirmations. |
fiken_list_products | read | List products The product register with unit price in cents, income account and VAT type. productId is what an invoice-draft line takes. Fiken: GET /companies/{companySlug}/products. |
fiken_get_product | read | Get a product One product. Fiken: GET /companies/{companySlug}/products/{productId}. |
fiken_list_sales | read | List sales Sales registered without an invoice (cash, card, Vipps and other direct sales), with amounts in cents. Fiken: GET /companies/{companySlug}/sales. |
fiken_get_sale | read | Get a sale One sale with lines, payments and settlement status. Fiken: GET /companies/{companySlug}/sales/{saleId}. |
fiken_list_purchases | read | List purchases (supplier bills and expenses) Purchases and supplier bills with amounts in cents and paid status. Fiken: GET /companies/{companySlug}/purchases. |
fiken_get_purchase | read | Get a purchase One purchase with lines, payments and attachments list. Fiken: GET /companies/{companySlug}/purchases/{purchaseId}. |
fiken_list_journal_entries | read | List journal entries General-ledger journal entries (bilag) with their postings. Fiken: GET /companies/{companySlug}/journalEntries. |
fiken_list_transactions | read | List transactions Ledger transactions (one per bookkeeping event) with their entries. Fiken: GET /companies/{companySlug}/transactions. |
fiken_list_projects | read | List projects Projects with number, name and completion status. Fiken: GET /companies/{companySlug}/projects. |
fiken_list_time_entries | read | List time entries Registered hours (Fiken Timeføring). Fiken: GET /companies/{companySlug}/timeEntries. |
fiken_list_inbox_documents | read | List inbox documents Documents waiting in the company's inbox (receipts and bills uploaded for bookkeeping). Fiken: GET /companies/{companySlug}/inbox. |
fiken_create_contact | write | Create a contact Create a customer and/or supplier contact. Set customer=true to invoice it later. The new contactId comes back in `id`. Fiken: POST /companies/{companySlug}/contacts. |
fiken_create_product | write | Create a product Add a product or service to the product register, for use on invoice lines. incomeAccount is a revenue account such as 3000 (see fiken_list_accounts). Fiken: POST /companies/{companySlug}/products. |
fiken_create_invoice_draft | write | Create an invoice draft Create a DRAFT of an invoice, offer or order confirmation. A draft is not issued, not booked and not sent; it can be edited or deleted in Fiken. The draft's id comes back in `id`. To issue it use fiken_issue_invoice_from_draft (type invoice only). Amounts are integers in cents. Fiken: POST /companies/{companySlug}/invoices/drafts. |
fiken_issue_invoice_from_draft | write | Issue an invoice from a draft (IRREVERSIBLE) IRREVERSIBLE. Turns an invoice draft into a real invoice: it gets the next invoice number and is booked in the ledger (accounts receivable and revenue, VAT). An issued invoice cannot be deleted, only corrected with a credit note. It is NOT sent to the customer: use fiken_send_invoice for that. Only call this when the user has clearly asked to issue this exact draft. Fiken: POST /companies/{companySlug}/invoices/drafts/{draftId}/createInvoice. |
fiken_send_invoice | write | Send an invoice to the customer (IRREVERSIBLE) IRREVERSIBLE. Delivers an issued invoice to the customer by email, EHF, eFaktura, SMS or physical letter (a letter costs extra and goes to Norwegian addresses only). A sent message cannot be recalled and Fiken records the invoice as sent. Only call this when the user has clearly asked to send this exact invoice to this recipient. method lists delivery channels in priority order; Fiken uses the first one that works. Fiken: POST /companies/{companySlug}/invoices/send. |
fiken_usage_status | Usage status (free-tier meter) 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. | |
fiken_request_feature | Request a missing feature Tell usefulapi that the user needs something the Fiken 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. | |
fiken_upgrade | Upgrade to Pro (unlimited*) Get Pro: unlimited tool calls (fair use limit: 10,000 a month) on Fiken (the free tier caps monthly usage). Plans: "monthly" — $9/month; "yearly" — $90/year (2 months free). Cancel any time: Pro then runs to the end of the paid period, so it also suits a one-time job. *A fair use limit applies. For heavy use (near Pro's limit): "plus" or "plus_yearly" — Pro+, $39/month or $390/year, unlimited tool calls (fair use limit: 100,000 a month); an existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Otherwise returns a short link to open in your browser (it opens Stripe Checkout); after payment the account upgrades automatically. Does not count against the meter. | |
fiken_cancel_subscription | Cancel the Pro subscription Cancel the caller's Fiken 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 fiken_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | Unlimited* |
*Pro fair use limit: 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this Fiken server only. Subscribe with fiken_upgrade (it returns a Stripe Checkout link). Cancel any time with fiken_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running fiken_upgrade before then undoes the cancel. Or write to [email protected].
Find overdue customer invoices. Review unpaid supplier bills. Check bank and account balances on a date. Look up a customer and the sales history. Prepare an invoice draft for a customer. Add a new customer and a product. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Fiken. The server calls the Fiken API with your own Fiken access, so it sees only the data that your account can see.
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.
A Fiken account. You sign in to Fiken and approve the access. You do not need an API key.
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: you sign in with your Fiken account. 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.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Fiken 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. You can revoke the access in Fiken at any time.
Yes, if you approve it. 5 of the 31 Fiken tools can create or change data. The other 26 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls (fair use limit: 10,000 tool calls a month), for this Fiken server only. Cancel any time: Pro then runs to the end of the paid period. Run fiken_usage_status to see how many calls you used.
Ask the AI to run fiken_upgrade: it returns a Stripe Checkout link. To cancel, run fiken_cancel_subscription. Pro continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with fiken_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.
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.