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.

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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
• Payments: List, register, and delete payments on existing sales and purchases; pay an invoice via fiken_create_invoice_payment
• 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

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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/...

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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