Request and Response Mapping in API Gateway
Learn how API Gateway transforms requests and responses between clients and backends using mapping, parameters, and status code handling.
Why Mapping Exists
API Gateway sits between clients and your backend. Mapping lets you transform the request before it reaches the backend and the response before it returns to the client, decoupling the two.
- Reshape payloads
- Move data between path, query, headers, and body
- Translate backend errors into clean client responses
Path, Query, and Header Parameters
You can extract values from the request path, query string, and headers, then pass them to the backend in a different location. For example, a path parameter can become a body field.
GET /users/{id} -> backend receives {"userId": 42}All lessons in this course
- Introduction to API Gateway
- HTTP API vs. REST API
- Integrating Lambda with API Gateway
- Request and Response Mapping in API Gateway