Core Capabilities

🌐

Unified API Gateway

Single endpoint for all your LLM providers including Azure OpenAI Service, OpenAI, Anthropic, and custom models.

  • OpenAI-compatible interface
  • Multi-region deployment
  • Custom domains support
  • SSL/TLS termination
⏱️

Built-in Caching

Reduce latency and API costs with Azure-native caching powered by Azure Cache for Redis.

  • Response caching policies
  • Custom cache keys
  • Cache invalidation
  • Distributed cache
🚦

Advanced Rate Limiting

Protect your LLM APIs from abuse with sophisticated rate limiting and quota management.

  • Per-key rate limits
  • Token-based throttling
  • Subscription tiers
  • Spike protection
📈

Monitoring & Analytics

Deep insights into API usage, performance metrics, and cost tracking through Azure Monitor.

  • Real-time dashboards
  • Custom alerts
  • Cost attribution
  • Log Analytics integration

Azure Ecosystem Integration

🤖

Azure OpenAI Service

Native GPT-4 integration

🔐

Azure AD / Entra ID

Enterprise SSO support

🗃️

Azure Cache for Redis

Response caching layer

📊

Azure Monitor

Observability platform

🔑

Azure Key Vault

Secret management

🐳

Azure Container Apps

Serverless hosting

Implementation Guide

Bicep Template
// Deploy APIM with LLM proxy configuration param location string = resourceGroup().location param apimName string = 'llm-proxy-apim' resource apim 'Microsoft.ApiManagement/service@2023-05-01-preview' = { name: apimName location: location sku: { name: 'Premium' capacity: 1 } properties: { publisherEmail: 'admin@contoso.com' publisherName: 'LLM Proxy Admin' virtualNetworkType: 'External' } } // Configure OpenAI backend resource openaiBackend 'Microsoft.ApiManagement/service/backends@2023-05-01-preview' = { parent: apim name: 'azure-openai' properties: { url: 'https://your-openai.openai.azure.com' protocol: 'http' } }

APIM Tiers for LLM Workloads

Developer
$50
per month
  • Non-production use
  • No SLA
  • Unlimited APIs
  • Basic caching
  • Managed identity
Premium
$2,800
per month
  • Production workloads
  • 99.95% SLA
  • Multi-region
  • VNet integration
  • Premium caching
  • Self-hosted gateway
Consumption
Pay-per-use
per million calls
  • Variable workloads
  • Auto-scaling
  • Serverless
  • Pay only for usage
  • Built-in HA

Policy Configuration Examples

Policy Purpose Configuration
Rate Limit Control API call frequency Per key, per subscription
Cache Response Cache LLM responses Duration, vary by headers
Validate JWT Azure AD authentication Issuer, audience check
Set Header Add API keys dynamically Key Vault reference
Retry Handle transient failures Exponential backoff
Log to Event Hub Send telemetry Custom event hub

🔗 Related Resources

Enterprise LLM Proxy | Security Best Practices | Redis Caching | Enterprise Gateways