Build a Mock API from Scratch | Path Params, Query Params, POST | CORS Explained | PART 2

In this hands-on demo video, we build a complete Mock API in Amazon API Gateway from scratch — no Lambda, no backend, no extra cost. We create a Products API step by step covering GET with hardcoded response, path parameters, query parameters (mandatory + optional), and a POST method. We have also explained the concept of Cross Origin Resource Scripting(CORS). This is the perfect starting point to understand how API Gateway actually works before connecting any real backend. ✅ What we build in this video: GET /products → hardcoded list of products GET /products/{id} → fetch one product using path parameter GET /products?category=Electronics&inStock=true → filter using query parameters POST /products → simulate adding a product (hardcoded 201 response) ✅ Concepts covered: What is Mock Integration and why use it? Creating a REST API in API Gateway console Creating resources and methods Setting up Mock Integration Writing Mapping Templates to read path and query parameters Declaring mandatory vs optional query parameters Returning custom HTTP status codes (201) Deploying to a stage Testing using AWS Console and Postman 👍 Like, Subscribe, and hit the Bell Icon! 🔔 Full AWS Series playlist linked below: https://www.youtube.com/playlist?list=PLhUN3FmBKNKaMRSymaRKnlsveQpKXFiiD Hashtags: #AWSAPIGateway #MockAPI #AWSDemo #AWSHindi #APIGatewayDemo #MappingTemplates #PathParameters #QueryParameters #ServerlessHindi #AWSBeginners #CloudComputingHindi #RESTAPIDemo