API Gateway

AWS service for REST and WebSocket APIs
REST and WebSocket APIs can be
- Created
- Published
- Maintained
- Monitored
- secured
APIs created, can also access AWS or other web services
APIs are used by client applications
third-party developers can also use the APIs, developed
Following APIs are supported
- stateful or WebSocket
- stateless or REST APIs.
Authentication can be done by
- AWS IAM policies
- Lambda authorizer functions
- Amazon Cognito user pools.
Can also use developer portal for publishing APIs.
For logging and monitoring of API and their changes, integrate seamlessly with CloudTrail
Support for custom domain names.
Create REST APIs that:
- Are HTTP-based.
- Adhere to the REST protocol, which enables stateless client-server communication.
- Implement standard HTTP methods such as GET, POST, PUT, PATCH and DELETE.
create WebSocket APIs
- Adhere to the WebSocket protocol, which enables stateful, full-duplex communication between client and server.
- Route incoming messages and based on message content.

Architecture

API Gateway handles accepting and processing up to hundreds of thousands of concurrent API calls,
It manages
- traffic management
- authorization
- access control
- monitoring
- API version management

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