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Merge pull request #3450 from akto-api-security/mcp-guardrails-master
guardrails service
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‎apps/guardrails-service/.gitignore‎

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.wrangler/
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.dev.vars

‎apps/guardrails-service/README.md‎

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# Guardrails Service
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A high-performance Go service for validating HTTP request/response payloads against guardrail policies, deployed on Cloudflare Workers with container support.
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## 🎯 Overview
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This service validates API traffic against guardrail policies, detects threats, and reports them to the Akto dashboard. It's designed for deployment on Cloudflare's edge network for low latency and global scalability.
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### Key Features
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✅ **Policy-Based Validation** - Validates payloads using akto-gateway library
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✅ **Threat Detection** - Automatically detects and reports security threats
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✅ **Edge Deployment** - Runs on Cloudflare's global network
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✅ **Auto-Scaling** - Scales automatically with traffic
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✅ **Mini-Runtime Compatible** - Drop-in replacement for mini-runtime-service validation
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## 🚀 Quick Start
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```bash
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# 1. Build and push container
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cd container
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docker build -t guardrails-service:latest .
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docker push registry.cloudflare.com/${ACCOUNT_ID}/guardrails-service:latest
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# 2. Deploy worker
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cd ../worker
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npm install
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wrangler secret put DATABASE_ABSTRACTOR_SERVICE_TOKEN
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wrangler secret put THREAT_BACKEND_TOKEN
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wrangler deploy
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# 3. Test
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curl https://guardrails-service.your-subdomain.workers.dev/health
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```
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See [QUICKSTART.md](./QUICKSTART.md) for detailed instructions.
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## 📂 Project Structure
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```
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guardrails-service/
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│
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├── worker/ # Cloudflare Worker (TypeScript)
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│ ├── src/
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│ │ └── index.ts # Worker proxy to container
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│ ├── wrangler.yaml # Worker configuration
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│ ├── package.json # Node.js dependencies
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│ └── tsconfig.json # TypeScript config
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│
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├── container/ # Go Service Container
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│ ├── src/
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│ │ ├── main.go # Application entry point
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│ │ ├── handlers/ # HTTP request handlers
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│ │ ├── models/ # Data models
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│ │ └── pkg/ # Internal packages
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│ │ ├── auth/ # JWT authentication
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│ │ ├── config/ # Configuration
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│ │ ├── dbabstractor/ # Policy fetching
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│ │ └── validator/ # Validation logic
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│ ├── Dockerfile # Container image
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│ ├── .env.example # Environment template
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│ ├── nginx-demo.env # Demo configuration
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│ ├── README.md # Container docs
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│ └── SETUP.md # Setup guide
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│
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├── DEPLOYMENT.md # Deployment guide
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├── QUICKSTART.md # Quick start guide
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└── README.md # This file
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```
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## 🏗️ Architecture
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```
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┌──────────────────────────┐
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│ Cloudflare Edge Network │
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│ │
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│ ┌────────────────────┐ │
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│ │ Worker (Proxy) │ │──────┐
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│ └────────────────────┘ │ │
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└──────────────────────────┘ │
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▼
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┌──────────────────────────┐
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│ Container (Go Service) │
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│ │
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│ • Fetch Policies │
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│ • Validate Payloads │
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│ • Report Threats │
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└──────────────────────────┘
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│
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┌─────────────┼─────────────┐
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│ │ │
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▼ ▼ ▼
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┌──────────┐ ┌──────────┐ ┌─────────┐
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│ Database │ │ Agent │ │ Threat │
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│Abstractor│ │ Guard │ │ Backend │
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│(Policies)│ │ Engine │ │(Dashboard)│
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└──────────┘ └──────────┘ └─────────┘
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```
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## 📋 API Endpoints
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### Health Check
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```bash
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GET /health # Container health
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GET /worker-health # Worker health
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```
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### Validation (Mini-Runtime Compatible)
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```bash
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POST /api/ingestData
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Content-Type: application/json
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{
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"batchData": [{
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"path": "/api/users",
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"method": "POST",
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"requestPayload": "{\"user\":\"john\"}",
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"responsePayload": "{\"id\":123}",
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"ip": "192.168.1.1",
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"statusCode": "200"
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}]
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}
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```
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### Individual Validation
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```bash
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POST /api/validate/request
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POST /api/validate/response
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```
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## 🔧 Configuration
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### Environment Variables
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| Variable | Required | Description |
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|----------|----------|-------------|
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| `DATABASE_ABSTRACTOR_SERVICE_TOKEN` | ✅ | JWT token for policy fetching |
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| `THREAT_BACKEND_TOKEN` | ✅ | Token for threat reporting |
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| `DATABASE_ABSTRACTOR_SERVICE_URL` | ✅ | Database abstractor URL |
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| `THREAT_BACKEND_URL` | ✅ | Threat backend URL |
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| `AGENT_GUARD_ENGINE_URL` | ✅ | Agent Guard Engine URL |
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| `SERVER_PORT` | ❌ | Port (default: 8080) |
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| `LOG_LEVEL` | ❌ | Log level (default: info) |
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See [container/.env.example](./container/.env.example) for template.
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## 🔍 How It Works
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1. **Receive Traffic** - Worker receives HTTP requests
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2. **Forward to Container** - Worker forwards to Go container
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3. **Fetch Policies** - Container fetches guardrail policies from DB abstractor
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4. **Validate** - Container validates request/response using akto-gateway library
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5. **Report Threats** - Container reports detected threats to dashboard
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6. **Return Result** - Worker returns validation result to client
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## 🛠️ Development
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### Local Development
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```bash
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# Terminal 1: Run container
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cd container/src
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set -a && source ../nginx-demo.env && set +a
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go run main.go
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# Terminal 2: Run worker
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cd worker
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wrangler dev
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```
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### Build Container
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```bash
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cd container
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docker build -t guardrails-service:latest .
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```
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### Test Worker
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```bash
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cd worker
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npm install
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npm run dev
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```
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## 📚 Documentation
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- **[QUICKSTART.md](./QUICKSTART.md)** - Get started in 5 minutes
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- **[DEPLOYMENT.md](./DEPLOYMENT.md)** - Complete deployment guide
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- **[container/README.md](./container/README.md)** - Container documentation
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- **[container/SETUP.md](./container/SETUP.md)** - Architecture and setup
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## 🚢 Deployment
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### Prerequisites
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- Cloudflare account with Workers paid plan
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- Docker installed
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- Wrangler CLI installed
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- Node.js and npm installed
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### Deploy to Cloudflare
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```bash
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# 1. Build container
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cd container
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docker build -t guardrails-service:latest .
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# 2. Push to Cloudflare registry
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ACCOUNT_ID=$(wrangler whoami | grep "Account ID" | awk '{print $3}')
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docker tag guardrails-service:latest registry.cloudflare.com/${ACCOUNT_ID}/guardrails-service:latest
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docker push registry.cloudflare.com/${ACCOUNT_ID}/guardrails-service:latest
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# 3. Deploy worker
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cd ../worker
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npm install
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wrangler secret put DATABASE_ABSTRACTOR_SERVICE_TOKEN
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wrangler secret put THREAT_BACKEND_TOKEN
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wrangler deploy
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```
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See [DEPLOYMENT.md](./DEPLOYMENT.md) for detailed instructions.
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## 📊 Monitoring
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```bash
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# View worker logs
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wrangler tail
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# View container logs
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wrangler tail --name guardrails-service-container
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# View metrics
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Visit: https://dash.cloudflare.com → Workers & Pages → guardrails-service
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```
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## 🧪 Testing
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```bash
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# Test health endpoint
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curl https://your-worker.workers.dev/health
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# Test validation
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curl -X POST https://your-worker.workers.dev/api/ingestData \
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-H "Content-Type: application/json" \
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-d @test-payload.json
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```
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## 🐛 Troubleshooting
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### Container not starting?
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```bash
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# Check logs
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wrangler tail --name guardrails-service-container
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# Verify environment
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wrangler secret list
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```
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### Worker can't reach container?
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- Check service binding in `worker/wrangler.yaml`
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- Verify container service is deployed
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- Test container health directly
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### Validation failing?
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- Verify DATABASE_ABSTRACTOR_SERVICE_TOKEN is valid
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- Check THREAT_BACKEND_TOKEN is set
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- Ensure Agent Guard Engine URL is accessible
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See [DEPLOYMENT.md#troubleshooting](./DEPLOYMENT.md#troubleshooting) for more.
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## 💰 Cost Estimation
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### Cloudflare Workers
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- First 100,000 requests/day: **Free**
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- Additional requests: **$0.50 per million**
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- Workers paid plan: **~$5/month**
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### Container
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- CPU time: **$0.12 per million GB-seconds**
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- Network egress: **$0.09 per GB**
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Typical cost for 1M requests/day: **$5-15/month**
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## 🔒 Security
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- ✅ Distroless container image
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- ✅ Non-root user
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- ✅ Secrets management with Wrangler
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- ✅ HTTPS by default
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- ✅ Rate limiting (configurable)
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- ✅ Environment variable encryption
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## 📈 Performance
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- **Latency**: <50ms (edge deployment)
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- **Throughput**: 1000+ req/s per instance
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- **Availability**: 99.99% (Cloudflare SLA)
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- **Auto-scaling**: Instant
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## 🤝 Contributing
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See the main Akto repository for contribution guidelines.
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## 📄 License
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See parent repository for license information.
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## 🆘 Support
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- **Documentation**: See docs in this directory
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- **Logs**: `wrangler tail`
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- **Cloudflare Docs**: https://developers.cloudflare.com/workers/
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- **Akto Support**: Contact development team
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## 🎯 Next Steps
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1. ✅ Follow [QUICKSTART.md](./QUICKSTART.md) to deploy
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2. Configure custom domain
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3. Set up monitoring and alerts
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4. Enable rate limiting
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5. Configure CI/CD pipeline
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6. Set up staging environment
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---
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**Built with** ❤️ **by Akto** | Powered by Cloudflare Workers

‎apps/guardrails-service/container/.env.example‎

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# Server configuration
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SERVER_PORT=8080
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# Database abstractor service
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DATABASE_ABSTRACTOR_SERVICE_URL=http://database-abstractor:9000
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DATABASE_ABSTRACTOR_SERVICE_TOKEN=your-jwt-token-here
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# Agent Guard Engine URL for NLP model computations
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AGENT_GUARD_ENGINE_URL=https://akto-agent-guard-engine.billing-53a.workers.dev
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# Threat backend service for publishing results to dashboard
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THREAT_BACKEND_URL=https://tbs.akto.io
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THREAT_BACKEND_TOKEN=your-akto-api-token-here
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# Logging
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LOG_LEVEL=info
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GIN_MODE=release

‎apps/guardrails-service/container/.gitignore‎

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.netrc

‎apps/guardrails-service/container/.netrc.template‎

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machine github.com
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login x-access-token
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password YOUR_GITHUB_TOKEN_HERE

‎apps/guardrails-service/container/DEPLOY.md‎

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# Build docker image for cloudflare (amd64)
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```bash
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cd apps/guardrails-service/container
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GITHUB_TOKEN=xxx ./setup-netrc.sh
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docker buildx build --platform linux/amd64 -t guardrails-service:1.0.0_local .
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```
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# Push image to cloudflare
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```bash
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npx wrangler containers push guardrails-service:1.0.0_local
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```
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# Deploy to cloudflare
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```bash
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cd ../worker
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npx wrangler deploy
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```

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