WYGIWYH API MCP Server
A production-ready Model Context Protocol (MCP) server that provides a universal interface to the WYGIWYH expense tracking API. The server dynamically generates 75 MCP tools from an OpenAPI specification, enabling AI agents and automation platforms like n8n to interact with the expense tracking system through standardized tool calls.
Original repo of WYGIWYH
✨ Features
- 🔄 Dynamic Tool Generation - Automatically generates 75 MCP tools from OpenAPI specification
- 🔐 Secure Authentication - Bearer token authentication for MCP endpoints + Basic Auth for API access
- 🚀 HTTP Streamable Transport - Full compatibility with n8n and other MCP clients
- 🐳 Production-Ready Docker - Optimized multi-stage build with health checks
- ⚡ Async/Await - Efficient non-blocking API communication
- 📊 Comprehensive API Coverage - All WYGIWYH API endpoints exposed as tools
🎯 Use Cases
- Automate expense tracking workflows with n8n
- Build AI assistants that manage financial data
- Create custom integrations with WYGIWYH API
- Implement voice-controlled expense logging
- Develop automated reporting systems
📦 Quick Start
Prerequisites
- Docker & Docker Compose
- WYGIWYH API credentials
- MCP Bearer token
Installation
-
Clone the repository
git clone https://github.com/ReNewator/MCP-WYGIWYH.git cd MCP-WYGIWYH -
Configure environment
cp .env.example .env # Edit .env with your credentials # Don't forget change you WYGIWYH url in server.py -
Deploy with Docker
./deploy.shOr manually:
docker-compose up -d -
Verify deployment
curl http://localhost:5000/health
🔧 Configuration
Create a .env file with the following variables:
# WYGIWYH API Credentials
API_USERNAME=your_email@example.com
API_PASSWORD=your_password_here
# MCP Server Authentication
MCP_TOKEN=your_mcp_bearer_token_here
🌐 n8n Integration
Configure the n8n MCP Client node:
- Endpoint:
http://your-server:5000/ - Transport: HTTP Streamable
- Authentication: Header Auth
- Name:
Authorization - Value:
Bearer YOUR_MCP_TOKEN
- Name:
🛠️ Available Tools
The server exposes 75 MCP tools organized by category:
Account Management
account-groups_*- Account group operations (6 tools)accounts_*- Account CRUD operations (6 tools)
Transaction Management
transactions_*- Transaction operations (6 tools)recurring-transactions_*- Recurring transaction management (6 tools)installment-plans_*- Installment plan handling (6 tools)
Financial Tools
categories_*- Expense category management (6 tools)tags_*- Transaction tagging (6 tools)currencies_*- Currency management (6 tools)exchange-rates_*- Exchange rate operations (6 tools)
Investment Features
dca_*- Dollar-cost averaging strategies (15 tools)entities_*- Entity management (6 tools)
Use the tools/list method to see all available tools with their schemas.
📁 Project Structure
.
├── mcp_sse_server.py # Main MCP server with HTTP Streamable
├── server.py # Core MCP implementation
├── test_server.py # Validation script
├── Dockerfile # Production Docker image
├── docker-compose.yml # Docker Compose config
├── deploy.sh # Automated deployment
├── requirements.txt # Python dependencies
├── DEPLOYMENT.md # Detailed deployment guide
├── PROJECT.md # Technical documentation
└── attached_assets/
└── WYGIWYH API.yaml # OpenAPI specification
🚀 Deployment
Docker (Recommended)
# Build and run
docker-compose up -d
# View logs
docker-compose logs -f
# Stop server
docker-compose down
Kubernetes
apiVersion: apps/v1
kind: Deployment
metadata:
name: wygiwyh-mcp-server
spec:
replicas: 2
template:
spec:
containers:
- name: mcp-server
image: wygiwyh-mcp-server:latest
ports:
- containerPort: 5000
env:
- name: API_USERNAME
valueFrom:
secretKeyRef:
name: wygiwyh-secrets
key: api-username
Cloud Platforms
- AWS ECS/Fargate - Use the Docker image with environment variables
- Google Cloud Run - Deploy as container with secrets management
- Azure Container Instances - Direct deployment from Docker Hub
See DEPLOYMENT.md for detailed cloud deployment instructions.
🧪 Testing
Run the validation script to verify the setup:
python test_server.py
This displays all 75 generated MCP tools grouped by category.
📊 API Endpoints
POST /- MCP JSON-RPC endpoint (requires Bearer token)GET /health- Health check (no authentication)
🔒 Security Features
- ✅ Bearer token authentication for MCP access
- ✅ Basic Auth for WYGIWYH API requests
- ✅ Non-root container user
- ✅ Secrets managed via environment variables
- ✅ No exposed credentials in logs
🏗️ Architecture
Dynamic Tool Generation
The server automatically generates MCP tools from the OpenAPI specification:
- Parses WYGIWYH API OpenAPI YAML
- Converts schemas to JSON Schema format
- Creates Tool objects for all operations
- Handles
allOfmerging for complex types - Exposes tools via MCP protocol
Benefits:
- Single source of truth (OpenAPI spec)
- Automatic updates when API changes
- Zero manual endpoint definitions
- Consistent tool schemas
Authentication Flow
┌─────────────┐ Bearer Token ┌─────────────┐
│ n8n/MCP │ ──────────────────> │ MCP Server │
│ Client │ │ │
└─────────────┘ └─────────────┘
│
│ Basic Auth
▼
┌─────────────┐
│ WYGIWYH │
│ API │
└─────────────┘
🐛 Troubleshooting
Server won't start
# Check logs
docker-compose logs
# Verify environment
cat .env
Authentication errors
- Ensure
API_USERNAMEis your WYGIWYH email - Verify
API_PASSWORDis correct - Check
MCP_TOKENmatches client configuration
Connection refused
# Check server status
docker-compose ps
# Test health endpoint
curl http://localhost:5000/health
📚 Documentation
- DEPLOYMENT.md - Comprehensive deployment guide
- PROJECT.md - Technical architecture documentation
🤝 Contributing
Contributions are welcome! Please follow these guidelines:
- Fork the repository
- Create a feature branch
- Make your changes with tests
- Submit a pull request
📄 License
Copyright (c) 2025 ReNewator.com. All rights reserved.
🔗 Links
💬 Support
For issues and questions:
- Open an issue on GitHub
- Check existing documentation
- Review deployment logs
Built with ❤️ by ReNewator.com