react-use-websocket VS Newman

I chose React as the library to implement the UI and I used some libraries like react-chatbot-kit for the chat component and react-use-websocket to manage the connection with the backend API.

And with a library like React useWebSocket, something like this:

useWebSocket is an open source module with 1.2K stars (so you know it’s popular), and it provides a well-thought-out hook to establish a WebSocket connection and manage the connection lifecycle.

Postman Monitors turn your existing Postman collections into scheduled API checks. If your team already uses Postman for API development and testing, monitors let you reuse those collections — complete with pre-request scripts, test assertions, and environment variables — as production monitoring without rewriting anything.

One underappreciated skill for frontend engineers learning backend work is getting comfortable testing APIs directly — without building a UI first. Tools like Postman or the VS Code extension Thunder Client let you fire off HTTP requests to your local server and inspect the responses in seconds. Even the terminal works:

Postman is an API development platform that helps teams design, test, and document APIs collaboratively. Teams use Postman collections and workspaces to share endpoints and scripts for consistency across projects. This helps teams onboard faster and reduce errors.

1. Get a real response. Use curl, Postman, or your browser's network tab to capture an actual API response.

Use Postman to send test requests with custom signature headers to a running server. ngrok lets you test against a real external sender during development.

Newman: command-line collection runner for Postman (postmanlabs/newman GitHub) - Official repository and usage examples for running Postman collections in CI, including --iteration-data for data-driven tests.

The results of the experiment are based on reproducing more than 100 cold starts and about 100,000 warm starts with the Lambda function GetProductByIdJava25WithDSQL. We retrieve the already existing product with ID=1  for the duration of about 1 hour. We send several hundred requests in parallel with some pauses in between. With that, the existing execution environments will be destroyed, and we will experience new Lambda cold starts. We give the Lambda function 1024 MB of memory, which is a good trade-off between performance and cost. We also use (default) x86 Lambda architecture. For the load tests, I used the load test tool hey, but you can use whatever tool you want, like Serverless-artillery or Postman.

TL;DR: For AI-native test generation from specs, try Kusho AI. For the most complete platform with the newest AI Agent Mode, go Postman. For open-source and Git-native workflows, Bruno or Hoppscotch are your best bets. Enterprise teams should evaluate Katalon. Collaboration-first smaller teams will like Testfully.

Postman started as an API testing tool but has evolved into a comprehensive API platform. Its documentation features leverage the collections you’ve already created for testing.