e-Fatura MCP Server

e-Fatura MCP Server

Integrates with the Turkish Revenue Administration (GİB) e-Arşiv Fatura system to manage e-invoices via natural language. Users can list, search, create, and cancel invoices, as well as validate Turkish tax numbers and retrieve UBL-TR format XML data.

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e-Fatura MCP Server

Türkiye Gelir İdaresi Başkanlığı (GİB) e-Arşiv Fatura sistemi ile entegrasyon sağlayan MCP sunucusu.

📝 Read the full story on Medium (Turkish)

English | Türkçe


English

Features

  • 📋 List and search e-Invoices
  • 🔍 Get invoice details and XML
  • ✏️ Create and cancel invoices
  • ✅ Validate Turkish tax numbers (VKN/TCKN)
  • 🎭 Demo mode - Test without real credentials
  • 🔒 Production ready - Auto-switching between demo and real API

Quick Start

1. Install

git clone https://github.com/reyhansunduk/efatura-mcp-server.git
cd efatura-mcp-server
pip install -e .

2. Demo Mode (No credentials needed)

The server works immediately with mock data:

python -m efatura_mcp.server

For test: ⚠️ DEMO MODE: Using mock data

3. Use with Claude Desktop

Create config file:

  • Windows: %APPDATA%\Claude\claude_desktop_config.json
  • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "efatura": {
      "command": "python",
      "args": ["-m", "efatura_mcp.server"],
      "cwd": "C:\\path\\to\\efatura-mcp-server"
    }
  }
}

4. Test in Claude Desktop

Ask Claude:

List invoices

You should see 5 demo invoices!

Switch to Real GİB API

When ready to use real data:

  1. Edit .env file:
GIB_USERNAME=your_vkn_here
GIB_PASSWORD=your_password_here
GIB_ENVIRONMENT=test
  1. Restart the server

The server automatically switches to real API when credentials are provided.

Available MCP Tools

The server provides 7 MCP tools that Claude can use:

1. list_invoices

List e-Fatura invoices from GIB system.

Parameters:

  • start_date (optional): Start date (YYYY-MM-DD)
  • end_date (optional): End date (YYYY-MM-DD)
  • limit (optional): Max invoices to return (default: 10)

Example: "Show me invoices from last month"

2. get_invoice_detail

Get detailed information for a specific invoice.

Parameters:

  • invoice_id (required): Invoice ID/UUID

Example: "Show details for invoice ABC2024000001"

3. get_invoice_xml

Get invoice HTML/XML content in UBL-TR format.

Parameters:

  • invoice_id (required): Invoice ID/UUID

Example: "Get XML for invoice ABC2024000001"

4. create_invoice

Create new e-Fatura invoice in GIB system.

Parameters:

  • invoice_number, issue_date, supplier_vkn, supplier_name
  • customer_vkn, customer_name, items[], total_amount
  • currency (optional, default: TRY)

Example: "Create invoice for 1000 TRY to customer XYZ"

5. cancel_invoice

Cancel an existing invoice.

Parameters:

  • invoice_id (required): Invoice ID to cancel
  • reason (required): Cancellation reason

Example: "Cancel invoice ABC2024000001 due to error"

6. search_invoices

Search invoices with filters.

Parameters:

  • customer_name, supplier_name (optional)
  • min_amount, max_amount (optional)
  • status (optional): approved, pending, cancelled

Example: "Find invoices over 10000 TRY", "Show pending invoices"

7. validate_tax_number

Validate Turkish tax number (VKN/TCKN).

Parameters:

  • tax_number (required): 10 or 11 digit tax number

Example: "Validate tax number 1234567890"

Getting GİB Credentials

Get Credentials: Use your company's existing e-Fatura credentials

  • Portal: https://earsivportal.efatura.gov.tr (production)
  • Test Portal: https://earsivportaltest.efatura.gov.tr (test)

Project Structure

efatura-mcp-server/
├── src/
│   └── efatura_mcp/
│       ├── server.py           # Main MCP server
│       ├── gib_earsiv_client.py # Real GİB API client
│       └── mock_data.py        # Demo data
├── .env                        # Credentials (gitignored)
├── .env.example               # Template
└── README.md

See SECURITY.md for complete guidelines.

Requirements

  • Python 3.10+
  • Claude Desktop (or any MCP client)

Dependencies are auto-installed with pip install -e .

License

MIT


Türkçe

Özellikler

  • 📋 e-Faturaları listele ve ara
  • 🔍 Fatura detayları ve XML al
  • ✏️ Fatura oluştur ve iptal et
  • ✅ Vergi numarası doğrula (VKN/TCKN)
  • 🎭 Demo modu - Gerçek credentials olmadan test et
  • 🔒 Production hazır - Demo ve gerçek API arası otomatik geçiş

Hızlı Başlangıç

1. Kurulum

git clone https://github.com/reyhansunduk/efatura-mcp-server.git
cd efatura-mcp-server
pip install -e .

2. Demo Modu (Credential gerekmez)

Sunucu hemen mock data ile çalışır:

python -m efatura_mcp.server

Test için: ⚠️ DEMO MODE: Using mock data

3. Claude Desktop ile Kullan

Config dosyası oluştur:

  • Windows: %APPDATA%\Claude\claude_desktop_config.json
  • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "efatura": {
      "command": "python",
      "args": ["-m", "efatura_mcp.server"],
      "cwd": "C:\\Users\\..\\efatura-mcp-server"
    }
  }
}

4. Claude Desktop'ta Test Et

Claude'a sor:

Faturaları listele

Faturalar listelenecektir.

Gerçek GİB API'ye Geç

Gerçek veri kullanmaya hazır olduğunda:

  1. .env dosyasını düzenle:
GIB_USERNAME=vkn_buraya
GIB_PASSWORD=sifre_buraya
GIB_ENVIRONMENT=test
  1. Sunucuyu yeniden başlat

Sunucu credentials verildiğinde otomatik olarak gerçek API'ye geçer.

Mevcut MCP Araçları

Sunucu Claude'un kullanabileceği 7 MCP aracı sağlar:

1. list_invoices

GİB sisteminden e-Faturaları listeler.

Parametreler:

  • start_date (opsiyonel): Başlangıç tarihi (YYYY-MM-DD)
  • end_date (opsiyonel): Bitiş tarihi (YYYY-MM-DD)
  • limit (opsiyonel): Max fatura sayısı (varsayılan: 10)

Örnek: "Geçen ayki faturaları göster"

2. get_invoice_detail

Belirli bir faturanın detaylı bilgilerini getirir.

Parametreler:

  • invoice_id (zorunlu): Fatura ID/UUID

Örnek: "ABC2024000001 faturasının detaylarını göster"

3. get_invoice_xml

Fatura HTML/XML içeriğini UBL-TR formatında getirir.

Parametreler:

  • invoice_id (zorunlu): Fatura ID/UUID

Örnek: "ABC2024000001 faturasının XML'ini getir"

4. create_invoice

GİB sisteminde yeni e-Fatura oluşturur.

Parametreler:

  • invoice_number, issue_date, supplier_vkn, supplier_name
  • customer_vkn, customer_name, items[], total_amount
  • currency (opsiyonel, varsayılan: TRY)

Örnek: "XYZ müşterisine 1000 TRY fatura oluştur"

5. cancel_invoice

Mevcut faturayı iptal eder.

Parametreler:

  • invoice_id (zorunlu): İptal edilecek fatura ID
  • reason (zorunlu): İptal sebebi

Örnek: "ABC2024000001 faturasını hata nedeniyle iptal et"

6. search_invoices

Filtrelerle fatura ara.

Parametreler:

  • customer_name, supplier_name (opsiyonel)
  • min_amount, max_amount (opsiyonel)
  • status (opsiyonel): approved, pending, cancelled

Örnek: "10000 TL üzeri faturaları bul", "Beklemedeki faturaları göster"

7. validate_tax_number

Türk vergi numarasını doğrula (VKN/TCKN).

Parametreler:

  • tax_number (zorunlu): 10 veya 11 haneli vergi numarası

Örnek: "1234567890 vergi numarasını doğrula"

GİB Credentials Nasıl Alınır

Nasıl Yapılır: Şirketinin mevcut e-Fatura credentials'ını kullan

  • Portal: https://earsivportal.efatura.gov.tr (canlı)
  • Test Portal: https://earsivportaltest.efatura.gov.tr (test)

Proje Yapısı

efatura-mcp-server/
├── src/
│   └── efatura_mcp/
│       ├── server.py           # Ana MCP sunucu
│       ├── gib_earsiv_client.py # Gerçek GİB API client
│       └── mock_data.py        # Demo verisi
├── .env                        #  credentials'ın (gitignored)
├── .env.example               # Şablon
└── README.md

Tam rehber için SECURITY.md'ye bak.

Gereksinimler

  • Python 3.10+
  • Claude Desktop (veya herhangi bir MCP client)

Bağımlılıklar pip install -e . ile otomatik kurulur.

Lisans

MIT


Support / Destek

For issues and questions, please open an issue on GitHub.

Sorunlar ve sorular için lütfen GitHub'da bir issue açın.

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