# SkyFi MCP Architecture Documentation
**Version**: 1.0
**Date**: January 2025
**Status**: Design Phase
---
## Table of Contents
1. [Overview](#overview)
2. [System Architecture](#system-architecture)
3. [Component Architecture](#component-architecture)
4. [Data Architecture](#data-architecture)
5. [API Architecture](#api-architecture)
6. [Security Architecture](#security-architecture)
7. [Deployment Architecture](#deployment-architecture)
8. [Integration Architecture](#integration-architecture)
9. [Performance Architecture](#performance-architecture)
10. [Monitoring & Observability](#monitoring--observability)
---
## 1. Overview
### 1.1 Purpose
This document describes the technical architecture of SkyFi MCP (Model Context Protocol), a comprehensive platform that enables AI agents to seamlessly interact with SkyFi's geospatial data services.
### 1.2 Architecture Principles
- **Stateless Design**: All services are stateless to enable horizontal scaling
- **Microservices**: Modular architecture for independent scaling and deployment
- **API-First**: RESTful APIs with SSE for real-time updates
- **Security by Design**: Authentication, encryption, and compliance built-in
- **Developer Experience**: Comprehensive documentation and easy integration
- **Performance**: Sub-500ms response times, 100+ concurrent connections
- **Reliability**: 99.9% uptime SLA with automated failover
### 1.3 Technology Stack
**Core Technologies** (To be finalized):
- **Runtime**: Node.js / Python / Go (TBD)
- **Framework**: Express.js / FastAPI / Gin (TBD)
- **Database**: PostgreSQL / MongoDB (TBD)
- **Cache**: Redis
- **Message Queue**: RabbitMQ / AWS SQS (for webhooks)
- **Container**: Docker
- **Orchestration**: Kubernetes / Docker Compose
**External Services**:
- SkyFi Public API
- OpenStreetMaps API
- Payment processing (TBD)
---
## 2. System Architecture
### 2.1 High-Level Architecture
```
┌─────────────────────────────────────────────────────────────┐
│ AI Agents Layer │
│ ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐ │
│ │ ADK │ │ LangChain│ │ AI SDK │ │ Custom │ │
│ └────┬─────┘ └────┬─────┘ └────┬─────┘ └────┬─────┘ │
└───────┼─────────────┼─────────────┼─────────────┼─────────┘
│ │ │ │
└─────────────┴─────────────┴─────────────┘
│
┌─────────────▼─────────────┐
│ SkyFi MCP Server │
│ ┌─────────────────────┐ │
│ │ API Gateway │ │
│ │ - Routing │ │
│ │ - Auth │ │
│ │ - Rate Limiting │ │
│ └──────────┬──────────┘ │
│ │ │
│ ┌──────────▼──────────┐ │
│ │ Service Layer │ │
│ │ - Order Service │ │
│ │ - Search Service │ │
│ │ - Pricing Service │ │
│ │ - Monitoring Svc │ │
│ │ - Notification Svc │ │
│ └──────────┬──────────┘ │
│ │ │
│ ┌──────────▼──────────┐ │
│ │ Repository Layer │ │
│ │ - Order Repo │ │
│ │ - Search Repo │ │
│ │ - Monitoring Repo │ │
│ └──────────┬──────────┘ │
└─────────────┼─────────────┘
│
┌─────────────┼─────────────┐
│ │ │
┌───────▼──────┐ ┌───▼────┐ ┌─────▼──────┐
│ Database │ │ Cache │ │ Message │
│ (PostgreSQL)│ │ (Redis)│ │ Queue │
└──────────────┘ └────────┘ └────────────┘
┌─────────────┼─────────────┐
│ │ │
┌───────▼──────┐ ┌───▼──────────┐ │
│ SkyFi API │ │ OpenStreetMaps│ │
└──────────────┘ └──────────────┘ │
```
### 2.2 Communication Patterns
#### 2.2.1 Request-Response (HTTP/REST)
- Primary communication pattern
- Synchronous operations
- Standard RESTful API design
- JSON request/response format
#### 2.2.2 Server-Sent Events (SSE)
- Real-time order status updates
- Monitoring event notifications
- One-way server-to-client communication
- Automatic reconnection handling
#### 2.2.3 Webhooks
- Asynchronous notifications to external systems
- Event-driven architecture
- Retry logic with exponential backoff
- Signature validation for security
### 2.3 Stateless Design
All services are stateless:
- No session state stored in application servers
- All state persisted in database or cache
- Enables horizontal scaling
- Supports load balancing
---
## 3. Component Architecture
### 3.1 API Gateway Layer
**Responsibilities**:
- Request routing
- Authentication and authorization
- Rate limiting
- Request/response logging
- Error handling
- API versioning
**Components**:
- `routes/index.ts` - Route definitions
- `middleware/auth.ts` - Authentication middleware
- `middleware/rateLimit.ts` - Rate limiting
- `middleware/errorHandler.ts` - Error handling
- `middleware/logger.ts` - Request logging
### 3.2 Service Layer
#### 3.2.1 Order Service
**Responsibilities**:
- Order creation and management
- Price calculation
- Order status tracking
- Order history retrieval
**Key Methods**:
- `createOrder(orderData)`
- `calculatePrice(orderData)`
- `getOrderStatus(orderId)`
- `getOrderHistory(userId)`
#### 3.2.2 Search Service
**Responsibilities**:
- Data catalog search
- Iterative search refinement
- Search history management
- Metadata enrichment
**Key Methods**:
- `searchData(query)`
- `refineSearch(searchId, criteria)`
- `getSearchHistory(userId)`
- `getSearchContext(searchId)`
#### 3.2.3 Pricing Service
**Responsibilities**:
- Price estimation
- Feasibility checking
- Cost comparison
- Alternative suggestions
**Key Methods**:
- `estimatePrice(orderData)`
- `checkFeasibility(orderData)`
- `comparePricing(scenarios)`
- `suggestAlternatives(orderData)`
#### 3.2.4 Monitoring Service
**Responsibilities**:
- AOI (Area of Interest) management
- Monitoring configuration
- Status tracking
- Event detection
**Key Methods**:
- `createAOI(aoiData)`
- `configureMonitoring(aoiId, config)`
- `getMonitoringStatus(aoiId)`
- `detectChanges(aoiId)`
#### 3.2.5 Notification Service
**Responsibilities**:
- Webhook delivery
- Retry logic
- Delivery status tracking
- Event formatting
**Key Methods**:
- `sendWebhook(webhookUrl, event)`
- `retryFailedWebhook(webhookId)`
- `getDeliveryStatus(webhookId)`
### 3.3 Repository Layer
**Responsibilities**:
- Data access abstraction
- Database operations
- Query optimization
- Transaction management
**Components**:
- `orderRepository.ts` - Order data access
- `searchRepository.ts` - Search data access
- `monitoringRepository.ts` - Monitoring data access
- `userRepository.ts` - User data access
### 3.4 External Client Layer
#### 3.4.1 SkyFi Client
**Responsibilities**:
- SkyFi API communication
- Request/response transformation
- Error handling and retries
- Rate limit compliance
**Key Methods**:
- `getDataCatalog(filters)`
- `createOrder(orderData)`
- `getOrderStatus(orderId)`
- `setupMonitoring(aoiData)`
#### 3.4.2 OpenStreetMaps Client
**Responsibilities**:
- OSM API communication
- Geocoding services
- Map tile access
- Response caching
**Key Methods**:
- `geocode(address)`
- `reverseGeocode(coordinates)`
- `searchPlaces(query)`
- `getMapTile(tileId)`
### 3.5 Authentication Layer
**Components**:
- `credentialManager.ts` - Credential storage and retrieval
- `apiKeyService.ts` - API key management
- `oauthService.ts` - OAuth 2.0 implementation
- `authMiddleware.ts` - Request authentication
---
## 4. Data Architecture
### 4.1 Database Schema
#### 4.1.1 Users Table
```sql
users (
id UUID PRIMARY KEY,
email VARCHAR(255) UNIQUE,
api_key_hash VARCHAR(255),
created_at TIMESTAMP,
updated_at TIMESTAMP,
is_active BOOLEAN
)
```
#### 4.1.2 Orders Table
```sql
orders (
id UUID PRIMARY KEY,
user_id UUID REFERENCES users(id),
skyfi_order_id VARCHAR(255),
order_data JSONB,
price DECIMAL(10,2),
status VARCHAR(50),
created_at TIMESTAMP,
updated_at TIMESTAMP
)
```
#### 4.1.3 Searches Table
```sql
searches (
id UUID PRIMARY KEY,
user_id UUID REFERENCES users(id),
query JSONB,
results JSONB,
context JSONB,
created_at TIMESTAMP
)
```
#### 4.1.4 Monitoring Table
```sql
monitoring (
id UUID PRIMARY KEY,
user_id UUID REFERENCES users(id),
aoi_data JSONB,
webhook_url VARCHAR(500),
status VARCHAR(50),
config JSONB,
created_at TIMESTAMP,
updated_at TIMESTAMP
)
```
#### 4.1.5 Webhooks Table
```sql
webhooks (
id UUID PRIMARY KEY,
monitoring_id UUID REFERENCES monitoring(id),
event_type VARCHAR(100),
payload JSONB,
status VARCHAR(50),
retry_count INTEGER,
delivered_at TIMESTAMP,
created_at TIMESTAMP
)
```
### 4.2 Caching Strategy
**Redis Cache Usage**:
- **Search Results**: Cache for 1 hour
- **Pricing Estimates**: Cache for 15 minutes
- **OpenStreetMaps Data**: Cache for 24 hours
- **User Sessions**: Cache for 1 hour
- **API Rate Limits**: Real-time tracking
**Cache Keys**:
- `search:{query_hash}` - Search results
- `price:{order_hash}` - Price estimates
- `osm:{geocode_hash}` - OSM geocoding
- `user:{user_id}` - User data
- `rate_limit:{user_id}` - Rate limit tracking
### 4.3 Data Flow
```
Client Request
↓
API Gateway (Auth, Rate Limit)
↓
Service Layer (Business Logic)
↓
Repository Layer (Data Access)
↓
Database / Cache
↓
External APIs (SkyFi, OSM)
↓
Response
```
---
## 5. API Architecture
### 5.1 API Design Principles
- **RESTful**: Follow REST conventions
- **Versioning**: `/v1/` prefix for API versioning
- **JSON**: All requests and responses in JSON
- **Error Handling**: Consistent error response format
- **Pagination**: Cursor-based pagination for large datasets
- **Filtering**: Query parameters for filtering and sorting
### 5.2 API Endpoints
#### 5.2.1 Authentication
```
POST /v1/auth/api-key - Generate API key
POST /v1/auth/validate - Validate API key
POST /v1/auth/rotate - Rotate API key
```
#### 5.2.2 Orders
```
POST /v1/orders - Create order
GET /v1/orders/:id - Get order status
GET /v1/orders - List orders
POST /v1/orders/:id/cancel - Cancel order
```
#### 5.2.3 Search
```
POST /v1/search - Search data catalog
POST /v1/search/:id/refine - Refine search
GET /v1/search/history - Get search history
GET /v1/search/:id - Get search context
```
#### 5.2.4 Pricing
```
POST /v1/pricing/estimate - Estimate price
POST /v1/pricing/feasibility - Check feasibility
POST /v1/pricing/compare - Compare pricing
```
#### 5.2.5 Monitoring
```
POST /v1/monitoring/aoi - Create AOI
GET /v1/monitoring/:id - Get monitoring status
PUT /v1/monitoring/:id - Update monitoring
DELETE /v1/monitoring/:id - Delete monitoring
POST /v1/monitoring/:id/webhook - Configure webhook
```
#### 5.2.6 Server-Sent Events
```
GET /v1/events/orders/:id - Order status updates
GET /v1/events/monitoring/:id - Monitoring events
```
### 5.3 Error Response Format
```json
{
"error": {
"code": "ERROR_CODE",
"message": "Human-readable error message",
"details": {
"field": "additional context"
},
"timestamp": "2025-01-15T10:30:00Z",
"request_id": "uuid"
}
}
```
### 5.4 API Versioning Strategy
- **URL Versioning**: `/v1/`, `/v2/`
- **Backward Compatibility**: Maintain previous versions for 6 months
- **Deprecation**: 3-month notice before version removal
- **Version Header**: Optional `X-API-Version` header
---
## 6. Security Architecture
### 6.1 Authentication
#### 6.1.1 API Key Authentication
- API keys stored as hashed values
- Key rotation support
- Key expiration and revocation
- Rate limiting per API key
#### 6.1.2 OAuth 2.0 (Enterprise)
- Authorization code flow
- Token refresh mechanism
- Scope-based permissions
- Token expiration and revocation
### 6.2 Authorization
- **Role-Based Access Control (RBAC)**
- **Resource-Level Permissions**
- **Multi-Tenant Isolation**
### 6.3 Data Protection
- **Encryption in Transit**: TLS 1.3
- **Encryption at Rest**: Database encryption
- **Credential Storage**: Encrypted with AES-256
- **PII Handling**: GDPR compliant
### 6.4 Security Measures
- **Rate Limiting**: Per-user and per-endpoint
- **DDoS Protection**: Cloud-based protection
- **Input Validation**: All inputs sanitized
- **SQL Injection Prevention**: Parameterized queries
- **XSS Prevention**: Output encoding
- **CSRF Protection**: Token validation
- **Security Headers**: HSTS, CSP, X-Frame-Options
### 6.5 Audit Logging
- All authentication events logged
- All order operations logged
- All administrative actions logged
- Security events logged
- Log retention: 90 days
---
## 7. Deployment Architecture
### 7.1 Local Deployment
**Docker Compose Setup**:
```yaml
services:
mcp-server:
build: .
ports:
- "3000:3000"
environment:
- DATABASE_URL=postgresql://...
- REDIS_URL=redis://...
depends_on:
- postgres
- redis
postgres:
image: postgres:15
volumes:
- postgres_data:/var/lib/postgresql/data
redis:
image: redis:7
volumes:
- redis_data:/data
```
### 7.2 Cloud Deployment
**Kubernetes Architecture**:
- **Deployment**: Stateless pods with auto-scaling
- **Service**: Load balancer for external access
- **Ingress**: API gateway with SSL termination
- **ConfigMap**: Environment configuration
- **Secrets**: Credentials and API keys
- **Horizontal Pod Autoscaler**: Scale based on CPU/memory
**Multi-Region**:
- Primary region for active traffic
- Secondary region for failover
- Database replication between regions
- Global load balancing
### 7.3 Scaling Strategy
**Horizontal Scaling**:
- Stateless services enable easy scaling
- Auto-scaling based on metrics
- Load balancing across instances
**Vertical Scaling**:
- Database connection pooling
- Cache size optimization
- Resource allocation tuning
---
## 8. Integration Architecture
### 8.1 Framework Integrations
#### 8.1.1 ADK Integration
- Native SDK with TypeScript types
- Tool definitions for AI agents
- Example implementations
#### 8.1.2 LangChain Integration
- Custom tools for LangChain agents
- Chain composition examples
- Integration patterns
#### 8.1.3 AI SDK Integration
- Plugin architecture
- Function calling support
- Streaming support
### 8.2 External API Integrations
#### 8.2.1 SkyFi API
- RESTful API client
- Authentication handling
- Error handling and retries
- Rate limit compliance
#### 8.2.2 OpenStreetMaps API
- Geocoding services
- Map tile access
- Response caching
- Error handling
### 8.3 Webhook Integration
**Webhook Flow**:
1. User configures webhook URL
2. Events trigger webhook delivery
3. Retry logic for failed deliveries
4. Delivery status tracking
**Webhook Security**:
- Signature validation
- HTTPS only
- Timeout handling
---
## 9. Performance Architecture
### 9.1 Performance Requirements
- **Response Time**: < 500ms for 95% of requests
- **Throughput**: 100+ concurrent connections
- **Availability**: 99.9% uptime
- **Scalability**: Horizontal scaling support
### 9.2 Optimization Strategies
**Caching**:
- Redis for frequently accessed data
- Cache invalidation strategies
- Cache warming for critical paths
**Database Optimization**:
- Indexed queries
- Connection pooling
- Query optimization
- Read replicas for scaling
**API Optimization**:
- Response compression
- Request batching
- Pagination for large datasets
- Field selection (sparse fieldsets)
**Network Optimization**:
- CDN for static assets
- HTTP/2 support
- Keep-alive connections
- Connection pooling
### 9.3 Load Testing
**Test Scenarios**:
- 100 concurrent users
- Peak load simulation
- Stress testing
- Endurance testing
**Metrics**:
- Response time percentiles
- Throughput
- Error rate
- Resource utilization
---
## 10. Monitoring & Observability
### 10.1 Logging
**Log Levels**:
- **DEBUG**: Detailed debugging information
- **INFO**: General informational messages
- **WARN**: Warning messages
- **ERROR**: Error messages
**Log Format**: Structured JSON logs
```json
{
"timestamp": "2025-01-15T10:30:00Z",
"level": "INFO",
"service": "order-service",
"message": "Order created",
"order_id": "uuid",
"user_id": "uuid",
"request_id": "uuid"
}
```
### 10.2 Metrics
**Application Metrics**:
- Request rate
- Response time (p50, p95, p99)
- Error rate
- Active connections
**Business Metrics**:
- Orders per minute
- Search queries per minute
- Active monitoring configurations
- Webhook delivery success rate
**Infrastructure Metrics**:
- CPU utilization
- Memory usage
- Database connections
- Cache hit rate
### 10.3 Alerting
**Alert Conditions**:
- Error rate > 1%
- Response time p95 > 1000ms
- CPU utilization > 80%
- Memory usage > 90%
- Database connection pool exhaustion
- Failed webhook deliveries > 10%
### 10.4 Health Checks
**Health Check Endpoint**: `GET /health`
**Health Check Components**:
- Database connectivity
- Cache connectivity
- External API connectivity
- Service dependencies
**Response Format**:
```json
{
"status": "healthy",
"timestamp": "2025-01-15T10:30:00Z",
"checks": {
"database": "ok",
"cache": "ok",
"skyfi_api": "ok"
}
}
```
---
## 11. Future Considerations
### 11.1 Scalability Enhancements
- Message queue for async processing
- Event-driven architecture expansion
- GraphQL API option
- WebSocket support for bidirectional communication
### 11.2 Feature Enhancements
- Advanced analytics and reporting
- Machine learning for pricing optimization
- Predictive monitoring
- Batch processing capabilities
### 11.3 Integration Enhancements
- Additional AI framework support
- More geospatial data providers
- Advanced visualization tools
- Mobile SDK development
---
## 12. Appendix
### 12.1 Glossary
- **MCP**: Model Context Protocol
- **AOI**: Area of Interest
- **SSE**: Server-Sent Events
- **API**: Application Programming Interface
- **RBAC**: Role-Based Access Control
- **PII**: Personally Identifiable Information
### 12.2 References
- SkyFi Public API Documentation
- MCP Protocol Specification
- OpenStreetMaps Documentation
- ADK, LangChain, AI SDK Documentation
### 12.3 Document History
| Version | Date | Author | Changes |
|---------|------|--------|---------|
| 1.0 | January 2025 | Architecture Team | Initial architecture document |
---
**Document Owner**: Architecture Team
**Review Cycle**: Monthly
**Next Review Date**: February 2025
