AbraFlexi MCP Server

A comprehensive Model Context Protocol (MCP) server for AbraFlexi integration using FastMCP and python-abraflexi. This server provides complete access to AbraFlexi REST API functionality through MCP-compatible tools.

Features

📄 Invoice Management

• invoice_issued_get - Retrieve issued invoices (faktura-vydana)

• invoice_issued_create - Create new issued invoices

• invoice_issued_update - Update existing issued invoices

• invoice_issued_delete - Remove issued invoices

• invoice_received_get - Retrieve received invoices (faktura-prijata)

• invoice_received_create - Create new received invoices

👥 Contact Management

• contact_get - Retrieve contacts and companies (adresar)

• contact_create - Create new contacts

• contact_update - Update existing contacts

• contact_delete - Remove contacts

📦 Product Management

• product_get - Retrieve products from price list (cenik)

• product_create - Create new products

• product_update - Update existing products

• product_delete - Remove products

🏦 Bank Transaction Management

• bank_transaction_get - Retrieve bank transactions (banka)

• bank_transaction_create - Create new bank transactions

🔧 Generic Evidence Operations

• evidence_get - Get records from any evidence

• evidence_create - Create record in any evidence

• evidence_update - Update record in any evidence

• evidence_delete - Delete record from any evidence

• evidence_list - List all available evidences

Installation

Prerequisites

• Python 3.10 or higher

• Access to an AbraFlexi server with API enabled

Option 1: Install from PyPI (Recommended)

pip install abraflexi-mcp-server

Then run the server:

abraflexi-mcp

Option 2: AppImage (Linux)

Download the self-contained AppImage from the latest release:

chmod +x AbraFlexi-MCP-Server-*-x86_64.AppImage
./AbraFlexi-MCP-Server-*-x86_64.AppImage

No Python or pip required. See AppImage section for details.

Option 3: Install from Source

1. Clone the repository:

   git clone https://github.com/VitexSoftware/abraflexi-mcp-server.git
   cd abraflexi-mcp-server

2. Install with uv (recommended):

   uv sync
   uv run python scripts/start_server.py

   Or with pip:

   pip install -e .
   abraflexi-mcp

Cloud Deployment

A testing deployment is available at:

🌐 https://abraflexi.fastmcp.app/mcp

This cloud-hosted instance allows you to test and use the AbraFlexi MCP server without local installation. Configure your MCP client to connect to this endpoint with HTTP transport.

Note: This is a testing deployment. For production use, we recommend self-hosting using one of the installation methods above.

Configuration

Create a .env file or set environment variables:

cp .env.example .env
# Edit .env with your AbraFlexi server details

Configuration

Required Environment Variables

• ABRAFLEXI_URL - Your AbraFlexi server URL (e.g., https://demo.flexibee.eu:5434)

• ABRAFLEXI_COMPANY - Company identifier (e.g., demo_de)

Authentication (choose one method)

Method 1: Username/Password (Recommended)

• ABRAFLEXI_LOGIN - Your AbraFlexi username

• ABRAFLEXI_PASSWORD - Your AbraFlexi password

Method 2: Session ID

• ABRAFLEXI_AUTHSESSID - Your AbraFlexi session ID

Optional Configuration

• READ_ONLY - Set to true, 1, or yes to enable read-only mode (default: true)

• ABRAFLEXI_TIMEOUT - Request timeout in seconds (default: 300)

Transport Configuration

• ABRAFLEXI_MCP_TRANSPORT - Transport type: stdio (default) or streamable-http

HTTP Transport Configuration (only used when ABRAFLEXI_MCP_TRANSPORT=streamable-http):

• ABRAFLEXI_MCP_HOST - Server host (default: 127.0.0.1)

• ABRAFLEXI_MCP_PORT - Server port (default: 8000)

• ABRAFLEXI_MCP_STATELESS_HTTP - Stateless mode (default: false)

• AUTH_TYPE - Must be set to no-auth for streamable-http transport

Usage

Running the Server

With startup script (recommended):

uv run python scripts/start_server.py

Direct execution:

uv run python -m abraflexi_mcp_server.server

Transport Options

The server supports two transport methods:

STDIO Transport (Default)

Standard input/output transport for MCP clients like Claude Desktop:

# Set in .env or environment
ABRAFLEXI_MCP_TRANSPORT=stdio

HTTP Transport

HTTP-based transport for web integrations:

# Set in .env or environment
ABRAFLEXI_MCP_TRANSPORT=streamable-http
ABRAFLEXI_MCP_HOST=127.0.0.1
ABRAFLEXI_MCP_PORT=8000
ABRAFLEXI_MCP_STATELESS_HTTP=false
AUTH_TYPE=no-auth

Testing

Run test suite:

uv run python scripts/test_server.py

Read-Only Mode

When READ_ONLY=true (default), the server will only expose GET operations (retrieve data) and block all create, update, and delete operations. This is useful for:

• 📊 Monitoring dashboards

• 🔍 Read-only integrations

• 🔒 Security-conscious environments

• 🛡️ Preventing accidental modifications

To enable write operations, set READ_ONLY=false in your .env file.

Example Tool Calls

Get all issued invoices:

invoice_issued_get(limit=10)

Get specific invoice by code:

invoice_issued_get(kod="INV-2024-001")

Create a new contact:

contact_create(
    kod="CUSTOMER01",
    nazev="Example Company s.r.o.",
    email="info@example.com",
    tel="+420123456789"
)

Get products:

product_get(nazev="Widget", limit=5)

Generic evidence query:

evidence_get(
    evidence="faktura-vydana",
    filter_expr="datVyst >= '2024-01-01'",
    limit=20
)

MCP Integration

This server is designed to work with MCP-compatible clients like Claude Desktop. See MCP_SETUP.md for detailed integration instructions.

OCI Container

The server can be run as an OCI container (Docker/Podman) — no Python installation needed on the host.

Building the image

podman build -t abraflexi-mcp-server -f Containerfile .

Running the container

The image defaults to streamable-http transport on port 8000.

With individual environment variables:

podman run --rm -p 8000:8000 \
  -e ABRAFLEXI_URL=https://demo.flexibee.eu:5434 \
  -e ABRAFLEXI_COMPANY=demo_de \
  -e ABRAFLEXI_LOGIN=winstrom \
  -e ABRAFLEXI_PASSWORD=winstrom \
  abraflexi-mcp-server

With an env file:

podman run --rm -p 8000:8000 --env-file .env abraflexi-mcp-server

Container environment defaults

All other configuration variables can be passed as environment variables.

AppImage

A self-contained, single-file Linux executable — no Python, pip, or any other dependency required on the host.

Building the AppImage

bash appimage/build-appimage.sh

The script downloads a portable CPython and appimagetool automatically. The resulting file is placed in build/appimage/:

build/appimage/AbraFlexi-MCP-Server-<version>-x86_64.AppImage

Running the AppImage

The AppImage automatically loads a .env file from the current working directory if one is present.

With a .env file (recommended):

cp .env.example .env
# edit .env with your credentials
./AbraFlexi-MCP-Server-*-x86_64.AppImage

With inline environment variables:

ABRAFLEXI_URL=https://demo.flexibee.eu:5434 \
ABRAFLEXI_COMPANY=demo_de \
ABRAFLEXI_LOGIN=winstrom \
ABRAFLEXI_PASSWORD=winstrom \
./AbraFlexi-MCP-Server-*-x86_64.AppImage

Development

Project Structure

abraflexi-mcp-server/
├── abraflexi_mcp_server/
│   ├── __init__.py
│   └── server.py                  # Main server implementation
├── appimage/
│   ├── AppRun                     # AppImage entry point
│   ├── abraflexi-mcp-server.desktop
│   ├── abraflexi-mcp-server.svg
│   └── build-appimage.sh          # AppImage build script
├── debian/                        # Debian packaging
├── scripts/
│   ├── start_server.py            # Startup script with validation
│   └── test_server.py             # Test script
├── Containerfile                  # OCI container build
├── server.json                    # MCP Registry manifest
├── pyproject.toml                 # Python project configuration
├── setup.py                       # Legacy setuptools configuration
├── requirements.txt               # Dependencies
├── .env.example                   # Environment configuration template
├── .env                           # Your configuration (not in git)
├── .gitignore                     # Git ignore patterns
└── README.md                      # This file

Running Tests

# Test server functionality
uv run python scripts/test_server.py

# Test with specific environment
ABRAFLEXI_URL=https://your-server.com uv run python scripts/test_server.py

Error Handling

The server includes comprehensive error handling:

• ✅ Authentication errors are clearly reported

• 🔒 Read-only mode violations are blocked with descriptive messages

• ✔️ Invalid parameters are validated

• 🌐 Network and API errors are properly formatted

• 📝 Detailed logging for troubleshooting

Security Considerations

• 🔑 Store credentials securely in .env file (never commit to git)

• 🔒 Enable read-only mode for monitoring-only use cases

• 🛡️ Use HTTPS for AbraFlexi server connections

• 🔄 Regularly rotate passwords

• 📁 Ensure .env file has proper permissions (600)

Troubleshooting

Common Issues

Connection Failed:

• Verify ABRAFLEXI_URL is correct and accessible

• Check authentication credentials

• Ensure AbraFlexi API is enabled

• Check firewall/network settings

Permission Denied:

• Verify user has sufficient AbraFlexi permissions

• Check if read-only mode is enabled when trying to modify data

Tool Not Found:

• Ensure all dependencies are installed: uv sync

• Verify Python version compatibility (3.10+)

Debug Mode

Set environment variable for detailed logging:

export DEBUG=1
uv run python scripts/start_server.py

Dependencies

• FastMCP - MCP server framework

• python-abraflexi - AbraFlexi Python library

• python-dotenv - Environment variable management

License

This project is licensed under the MIT License.

Acknowledgments

• AbraFlexi for the accounting platform

• Model Context Protocol for the integration standard

• FastMCP for the server framework

Support

• 📖 Documentation

• 🐛 Issue Tracker

• 💬 AbraFlexi API Documentation

Author

Vítězslav Dvořák

• Email: info@vitexsoftware.cz

• GitHub: @VitexSoftware

Made with ❤️ for the AbraFlexi and MCP communities