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Cloud Endpoints is a distributed API management system on Google Cloud. It provides authentication, monitoring, logging, and API key validation for APIs hosted on any Google Cloud compute platform — Compute Engine, GKE, Cloud Run, or App Engine. Unlike API Gateway, Cloud Endpoints supports both REST and gRPC APIs and works with backends beyond serverless services.
Cloud Endpoints is an API management layer that uses the Extensible Service Proxy (ESP) or ESPv2 — a high-performance, Envoy-based proxy — to intercept API requests, validate authentication, enforce quotas, and report metrics. You deploy ESP alongside your backend service, and it handles cross-cutting API management concerns.
| Feature | Description |
|---|---|
| OpenAPI & gRPC support | Define APIs using OpenAPI 2.0 or Protocol Buffers |
| ESP/ESPv2 proxy | High-performance Envoy-based proxy for request interception |
| Authentication | API keys, Google ID tokens, Firebase, Auth0, custom JWT |
| Monitoring | Automatic integration with Cloud Monitoring |
| Logging | Detailed request logs in Cloud Logging |
| Quotas | Per-consumer rate limiting and quota enforcement |
| Developer Portal | Auto-generated API documentation and developer portal |
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