API Gateway

Solution Architect Associate

Developer Associate

  • Fully managed service for publishing, managing and maintaining APIs
  • Exposes HTTPS endpoints to define a RESTful API
  • Define API, then Resource and Nested Resources
  • Allows you to attach a Web Application Firewall to protect your endpoints (know for exam!!)
  • You can enable API Caching in API Gateway to cache responses, reducing the number of calls to Lambda
  • You can import APIs from Swagger/OpenAPI files as of 2018 (know this for exam!!)
  • To turn on CORS, you do this at the API level under the top most resource (or any sub resources)
  • To accept query string params, you need to enable them for each method that needs them
  • You can add a body mapping template to help enable request validation for your API
  • API Throttling (know this for exam!!)
    • By default, the steady state request rate per second is 10,000
    • The maximum number of concurrent requests is 5000. This is across ALL apis on your account
    • If you go over these numbers, you’ll get an error code 429 (too many requests)
    • You can lift throttling limits, but you’ll be charged more…
  • You can use API Gateway as a SOAP service pass through
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