API Gateway on Google Cloud is a fully managed service for creating, securing, and monitoring APIs that front serverless backends and other services. It handles authentication, key validation, and traffic monitoring so developers can expose APIs without operating gateway infrastructure. It works cleanly with Cloud Functions, Cloud Run, and App Engine to publish backends behind a consistent, secured API layer.
Capabilities
Route and version REST/HTTP and WebSocket APIs to backend services
Authenticate and authorize callers (API keys, JWT, IAM, OAuth)
Throttle, rate-limit, and apply per-client quotas
Request/response transformation, caching, and usage metering