fiken-mcp: Model Context Protocol Server for Fiken Accounting API

A Model Context Protocol (MCP) server that connects AI assistants like Claude and Cursor to the Fiken accounting API. Manage invoices, contacts, purchases, journal entries, and more — directly from your AI assistant.

All mutating operations (POST, PUT, PATCH, DELETE) require explicit user approval before executing.

NOTE: This is an unofficial library and is not affiliated with or endorsed by Fiken AS. Use at own risk.

NOTE: Built using Claude Code. Use at own risk.

Features

• Invoices & Credit Notes: Create, send, and manage invoices and credit notes with full draft support
• Contacts: Full CRUD for customers and suppliers, including contact persons
• Purchases & Sales: Record and manage purchases and sales transactions
• Offers & Order Confirmations: Create and send offers, convert to invoices
• Accounting: Bookkeeping accounts, bank accounts, journal entries, transactions
• Reports: Product sales reports, account balances
• Time Tracking: Projects, time entries, activities, team members

Configuration

Add the server to your AI client config. No installation needed — npx/pnpx will fetch it automatically.

Getting Your Credentials

• API Token: fiken.no → Profile → API → Personal tokens
• Company Slug: Found in your Fiken URL: fiken.no/company/YOUR-SLUG/...

Claude Desktop

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
    "mcpServers": {
        "fiken": {
            "command": "npx",
            "args": ["-y", "fiken-mcp"],
            "env": {
                "FIKEN_API_TOKEN": "your-personal-token-here",
                "FIKEN_COMPANY_SLUG": "your-company-slug"
            }
        }
    }
}

Or with pnpm:

{
    "mcpServers": {
        "fiken": {
            "command": "pnpx",
            "args": ["fiken-mcp"],
            "env": {
                "FIKEN_API_TOKEN": "your-personal-token-here",
                "FIKEN_COMPANY_SLUG": "your-company-slug"
            }
        }
    }
}

Claude Code

Add to ~/.claude.json under mcpServers:

{
    "mcpServers": {
        "fiken": {
            "command": "npx",
            "args": ["-y", "fiken-mcp"],
            "env": {
                "FIKEN_API_TOKEN": "your-personal-token-here",
                "FIKEN_COMPANY_SLUG": "your-company-slug"
            }
        }
    }
}

Cursor

Add to ~/.cursor/mcp.json:

{
    "mcpServers": {
        "fiken": {
            "command": "npx",
            "args": ["-y", "fiken-mcp"],
            "env": {
                "FIKEN_API_TOKEN": "your-personal-token-here",
                "FIKEN_COMPANY_SLUG": "your-company-slug"
            }
        }
    }
}

Available Tools

| Category | Tools | | :---------------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | User | fiken_get_user | | Companies | fiken_list_companies, fiken_get_company | | Accounts | fiken_list_accounts, fiken_get_account, fiken_list_account_balances, fiken_get_account_balance | | Bank | fiken_list_bank_accounts, fiken_create_bank_account, fiken_get_bank_account, fiken_list_bank_balances | | Contacts | fiken_list_contacts, fiken_create_contact, fiken_get_contact, fiken_update_contact, fiken_delete_contact, fiken_list_contact_persons, fiken_create_contact_person, fiken_get_contact_person, fiken_update_contact_person, fiken_delete_contact_person, fiken_list_groups | | Invoices | fiken_list_invoices, fiken_create_invoice, fiken_get_invoice, fiken_update_invoice, fiken_get_invoice_attachments, fiken_send_invoice, fiken_get_invoice_counter, fiken_create_invoice_counter, fiken_list_invoice_drafts, fiken_create_invoice_draft, fiken_get_invoice_draft, fiken_update_invoice_draft, fiken_delete_invoice_draft, fiken_get_invoice_draft_attachments, fiken_create_invoice_from_draft | | Credit Notes | fiken_list_credit_notes, fiken_get_credit_note, fiken_create_full_credit_note, fiken_create_partial_credit_note, fiken_send_credit_note, fiken_get_credit_note_counter, fiken_create_credit_note_counter, fiken_list_credit_note_drafts, fiken_create_credit_note_draft, fiken_get_credit_note_draft, fiken_update_credit_note_draft, fiken_delete_credit_note_draft, fiken_get_credit_note_draft_attachments, fiken_create_credit_note_from_draft | | Offers | fiken_list_offers, fiken_get_offer, fiken_get_offer_counter, fiken_create_offer_counter, fiken_list_offer_drafts, fiken_create_offer_draft, fiken_get_offer_draft, fiken_update_offer_draft, fiken_delete_offer_draft, fiken_get_offer_draft_attachments, fiken_create_offer_from_draft, fiken_send_offer | | Order Confirmations | fiken_list_order_confirmations, fiken_get_order_confirmation, fiken_get_order_confirmation_counter, fiken_create_order_confirmation_counter, fiken_create_invoice_draft_from_order_confirmation | | Purchases | fiken_list_purchases, fiken_create_purchase, fiken_get_purchase, fiken_delete_purchase, fiken_get_purchase_attachments, fiken_add_purchase_attachment, fiken_list_purchase_drafts, fiken_create_purchase_draft, fiken_get_purchase_draft, fiken_update_purchase_draft, fiken_delete_purchase_draft, fiken_get_purchase_draft_attachments, fiken_create_purchase_from_draft | | Sales | fiken_list_sales, fiken_create_sale, fiken_get_sale, fiken_delete_sale, fiken_get_sale_attachments, fiken_list_sale_drafts, fiken_create_sale_draft, fiken_get_sale_draft, fiken_update_sale_draft, fiken_delete_sale_draft, fiken_get_sale_draft_attachments, fiken_create_sale_from_draft | | Journal Entries | fiken_list_journal_entries, fiken_get_journal_entry, fiken_get_journal_entry_attachments, fiken_create_journal_entry | | Transactions | fiken_list_transactions, fiken_get_transaction, fiken_delete_transaction | | Misc | fiken_create_product_sales_report, fiken_list_projects, fiken_list_time_entries, fiken_list_activities, fiken_list_time_users, fiken_list_inbox |

Note: Amounts are in NOK øre (1/100 of a krone). Dates use YYYY-MM-DD format.

Local Development

git clone https://github.com/gronnmann/fiken-mcp.git
cd fiken-mcp
pnpm install       # Install dependencies
pnpm build         # Compile TypeScript → build/
pnpm dev           # Run with tsx (no build needed)

License

MIT