# SaaS Deployment Roadmap
This document outlines the roadmap for evolving the Azure DevOps MCP Server from a single-user tool to a multi-tenant SaaS platform.
## Current State (v1.1.0)
The HTTP transport foundation is complete:
- Streamable HTTP transport with JSON-RPC 2.0
- Session management
- CORS support for browser clients
- Docker containerization
- Health check endpoint
### Current Architecture
```
┌─────────────────────────────────────────────────────┐
│ HTTP Client │
│ (Browser, CLI, AI Agent) │
└─────────────────────┬───────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────┐
│ HTTP Transport (Express) │
│ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │
│ │ CORS │ │ Session │ │ Health │ │
│ │ Middleware │ │ Manager │ │ Check │ │
│ └─────────────┘ └─────────────┘ └─────────────┘ │
└─────────────────────┬───────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────┐
│ MCP Server │
│ (106 Tools) │
└─────────────────────┬───────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────┐
│ Azure DevOps API (Single PAT) │
└─────────────────────────────────────────────────────┘
```
---
## Phase 1: Production Hardening
**Timeline: 1-2 Sprints**
### 1.1 Enhanced Logging
- [ ] Integrate structured logging throughout
- [ ] Add request tracing with correlation IDs
- [ ] Configure log aggregation (CloudWatch, ELK, etc.)
- [ ] Add performance metrics logging
### 1.2 Error Handling
- [ ] Standardize error responses
- [ ] Add error recovery mechanisms
- [ ] Implement circuit breaker for ADO API
- [ ] Add retry logic with exponential backoff
### 1.3 Rate Limiting
- [ ] Per-session rate limiting
- [ ] Per-IP rate limiting
- [ ] Tool-specific rate limits
- [ ] Rate limit headers in responses
### 1.4 Health Checks
- [ ] Deep health checks (ADO connectivity)
- [ ] Readiness vs. liveness probes
- [ ] Dependency health reporting
- [ ] Metrics endpoint (Prometheus format)
---
## Phase 2: Authentication & Authorization
**Timeline: 2-3 Sprints**
### 2.1 API Key Authentication
- [ ] API key generation and management
- [ ] Key storage (encrypted in database)
- [ ] Key rotation support
- [ ] Per-key rate limits and permissions
### 2.2 OAuth2/JWT Integration
- [ ] JWT token validation
- [ ] OAuth2 authorization code flow
- [ ] Refresh token handling
- [ ] Scope-based authorization
### 2.3 Azure AD Integration
- [ ] Azure AD authentication
- [ ] Service principal support
- [ ] Multi-tenant Azure AD
- [ ] Enterprise SSO
### 2.4 Authorization Framework
- [ ] Role-based access control (RBAC)
- [ ] Tool-level permissions
- [ ] Project-level restrictions
- [ ] Audit logging for all actions
---
## Phase 3: Multi-Tenancy
**Timeline: 3-4 Sprints**
### 3.1 Tenant Isolation
```
┌─────────────────────────────────────────────────────┐
│ API Gateway │
│ (Authentication, Routing) │
└─────────────────────┬───────────────────────────────┘
│
┌─────────────┼─────────────┐
▼ ▼ ▼
┌─────────┐ ┌─────────┐ ┌─────────┐
│Tenant A │ │Tenant B │ │Tenant C │
│Instance │ │Instance │ │Instance │
└────┬────┘ └────┬────┘ └────┬────┘
│ │ │
▼ ▼ ▼
┌─────────┐ ┌─────────┐ ┌─────────┐
│ ADO Org │ │ ADO Org │ │ ADO Org │
│ A │ │ B │ │ C │
└─────────┘ └─────────┘ └─────────┘
```
### 3.2 Configuration Management
- [ ] Per-tenant ADO credentials (encrypted)
- [ ] Tenant-specific settings
- [ ] Default project per tenant
- [ ] Custom tool configurations
### 3.3 Data Isolation
- [ ] Session isolation by tenant
- [ ] Separate caching per tenant
- [ ] Tenant-specific audit logs
- [ ] Data residency compliance
---
## Phase 4: Scalability
**Timeline: 2-3 Sprints**
### 4.1 Horizontal Scaling
```
┌──────────────────────────────────────────────────────┐
│ Load Balancer │
└──────────────────────┬───────────────────────────────┘
│
┌───────────────┼───────────────┐
▼ ▼ ▼
┌─────────────┐ ┌─────────────┐ ┌─────────────┐
│ Instance 1 │ │ Instance 2 │ │ Instance 3 │
│ (Pod) │ │ (Pod) │ │ (Pod) │
└──────┬──────┘ └──────┬──────┘ └──────┬──────┘
│ │ │
└───────────────┼───────────────┘
▼
┌─────────────────┐
│ Redis Cluster │
│ (Sessions + │
│ Caching) │
└─────────────────┘
```
### 4.2 Session Persistence
- [ ] Redis session store
- [ ] Session replication
- [ ] Sticky sessions (optional)
- [ ] Graceful session migration
### 4.3 Caching Layer
- [ ] Response caching for read operations
- [ ] Cache invalidation strategies
- [ ] Distributed caching (Redis)
- [ ] Cache warming for common queries
### 4.4 Kubernetes Deployment
- [ ] Helm charts
- [ ] Auto-scaling configuration
- [ ] Pod disruption budgets
- [ ] Resource quotas and limits
---
## Phase 5: Enterprise Features
**Timeline: 3-4 Sprints**
### 5.1 Administration Dashboard
- [ ] Tenant management UI
- [ ] User management
- [ ] API key administration
- [ ] Usage analytics dashboard
### 5.2 Billing & Metering
- [ ] Usage tracking per tenant
- [ ] API call metering
- [ ] Billing integration
- [ ] Usage reports and exports
### 5.3 Compliance & Security
- [ ] SOC 2 compliance preparation
- [ ] GDPR data handling
- [ ] Security audit logging
- [ ] Vulnerability scanning (CI/CD)
### 5.4 SLA & Support
- [ ] SLA monitoring
- [ ] Incident management integration
- [ ] Customer support ticketing
- [ ] Status page integration
---
## Technology Recommendations
### Infrastructure
| Component | Recommendation | Alternatives |
|-----------|---------------|--------------|
| Container Orchestration | Kubernetes (AKS/EKS/GKE) | Docker Swarm |
| Session Store | Redis Cluster | Memcached |
| Database | PostgreSQL | MongoDB |
| Message Queue | RabbitMQ | Azure Service Bus |
| API Gateway | Kong / NGINX | AWS API Gateway |
| Secrets Management | HashiCorp Vault | Azure Key Vault |
| Monitoring | Prometheus + Grafana | Datadog |
| Logging | ELK Stack | CloudWatch Logs |
### Development
| Area | Recommendation |
|------|---------------|
| API Documentation | OpenAPI 3.0 + Swagger UI |
| Testing | Jest + Supertest + k6 (load) |
| CI/CD | GitHub Actions / Azure DevOps |
| Code Quality | ESLint + Prettier + SonarQube |
---
## Migration Path
### From Single-User to SaaS
1. **Deploy HTTP mode** (current)
2. **Add authentication** (Phase 2)
3. **Enable multi-tenancy** (Phase 3)
4. **Scale horizontally** (Phase 4)
5. **Add enterprise features** (Phase 5)
### Backward Compatibility
- STDIO mode remains available for local use
- API remains stable across versions
- Deprecation notices before breaking changes
- Migration guides for each major version
---
## Success Metrics
| Metric | Target |
|--------|--------|
| API Latency (p99) | < 500ms |
| Availability | 99.9% |
| Time to First Tool Call | < 2 seconds |
| Concurrent Sessions | 10,000+ |
| Tool Success Rate | > 99% |
---
## Getting Started with SaaS Development
To contribute to SaaS features:
1. Review the stubs in `src/middleware/auth.ts` and `src/utils/logger.ts`
2. Check the [CONTRIBUTING.md](../CONTRIBUTING.md) guidelines
3. Propose changes via GitHub Issues
4. Submit PRs with tests and documentation
---
## Contact
For questions about the SaaS roadmap:
- GitHub Issues: Feature requests and discussions
- Pull Requests: Code contributions
---
*Last updated: January 2025*
