How to Share API Collections With Your Team
Learn how to share API collections with your team: shared vs local workspaces, sharing environments safely, and migrating with import/export.
How to Upload Files via API: Multipart & Base64
Learn how to upload files via API: multipart/form-data vs Base64 in JSON, when to use each, and how to send file uploads correctly.
How to Automate API Testing (Without the Headaches)
Learn how to automate API testing: add assertions, group requests, drive them with data, and run them repeatably so regressions surface early.
WebSocket vs REST: When to Use Each
WebSocket vs REST: one holds a connection open for real-time, the other is request/response. Learn when to use each, with practical examples.
API Throttling vs Rate Limiting: The Difference
Throttling smooths traffic; rate limiting caps it and returns 429. Learn the difference between API throttling and rate limiting, with clear examples.
API Rate Limiting: How to Handle 429 Errors
Learn how API rate limiting works, what HTTP 429 and Retry-After mean, and how to handle and test rate limits without getting your client blocked.
How to Test an API: A Step-by-Step Guide
New to API testing? Learn how to test an API step by step: send a request, inspect the response, assert on it, and then automate the run.
How to Run API Tests in CI/CD (with Reports)
Learn how to run API tests in CI/CD: trigger tests on every push, gate deploys on failures, and publish reports your team can read.
How to Configure Proxy Settings for API Requests
Learn how to configure proxy settings for API requests: route calls through a proxy host and port, handle corporate proxies, and debug traffic.
How to Auto-Generate API Documentation
Learn how to auto-generate API documentation from your requests and example responses, and publish docs your team can actually use.
How to Build API Automation Flows (Visual Guide)
Learn how to build API automation flows: chain requests, extract variables, and add conditions so a whole scenario runs from start to finish.
How to Run API Tests from the Command Line
Learn how to run API tests from the command line, with Newman and beyond, so your test suite fits cleanly into scripts and CI pipelines.
How to Set Up API Monitoring (Step by Step)
Learn how to set up API monitoring: schedule requests, assert on the results, track uptime and latency, and get alerted the moment an API breaks.
API Load and Performance Testing: A Practical Guide
A practical guide to API load and performance testing: virtual users, p50/p95/p99 latency, finding the breaking point, and the right tools.
How to Test gRPC Services and APIs
Learn how to test gRPC services: invoke methods from a .proto contract, assert on typed responses, and use tools like grpcurl and ghz.
How to Test WebSocket APIs (Tools & Techniques)
Learn how to test WebSocket APIs: open a connection, send and assert on messages, and use the tools that make real-time testing manageable.
How to Chain API Requests (Pass Data Between Calls)
Learn how to chain API requests: capture a value such as a token from one response and reuse it in the next request, with no copy-paste.
How to Write API Tests and Assertions
Learn how to write API tests and assertions that check status codes, response bodies, and schemas, so broken contracts fail loudly and early.
Pre-request and Post-response Scripts in API Testing
Learn how pre-request and post-response scripts work in API testing: prepare data before a call, then validate or extract values after it.
How to Use Environment Variables in API Requests
Learn how to use environment variables in API requests to switch between dev, staging, and prod cleanly, and to keep secrets out of your requests.
Variables in API Testing: Scopes & Precedence
Master variables in API testing: the five scopes, how precedence resolves name conflicts, and how to read and write variables from scripts.
The Best API Testing Tools in 2026 (by Category)
The best API testing tools in 2026, grouped by category: clients, automation, load, and contract testing, so you can pick the right tool for the job.
How to Use Bearer Tokens for API Authentication
Learn how Bearer token authentication works, how to send the Authorization header correctly, and how to capture and refresh tokens when testing APIs.
How to Set Up API Key Authentication
Learn how to set up API key authentication the right way: header vs query string, key generation and rotation, and keeping keys out of logs.
API Key vs OAuth: Which Should You Use?
API keys are simple; OAuth 2.0 is scoped and revocable. Compare API key vs OAuth on security, lifetime, and use cases to pick the right one.
OAuth vs JWT: What's the Difference?
OAuth and JWT solve different problems: one is a protocol, the other a token format. Learn the real difference and when to use each.
OAuth 2.0 Flows Explained (With Examples)
Authorization Code, PKCE, Client Credentials, Device Code: understand every OAuth 2.0 flow, which one to use, and which flows are now deprecated.
API Authentication Methods: A Complete Guide
API keys, Bearer tokens, JWT, OAuth 2.0, Basic auth: compare every API authentication method, when to use it, and how to implement it correctly.
gRPC vs REST: When to Use Which Protocol
gRPC vs REST compared: transport, payloads, streaming, and typing. Learn which protocol fits your API and how to work with each one.
GraphQL vs REST: How to Choose and Test Both
GraphQL or REST? Compare how each handles queries, over-fetching, and tooling, then learn how to test both kinds of API effectively.
Webhooks vs APIs: What's the Difference?
Webhooks push events to you; APIs wait to be polled. Learn the difference between webhooks and APIs, when to use each, and how to test both.
How to Fix 401 Unauthorized Errors When Testing APIs
A 401 means your request isn't authenticated. Learn what causes 401 Unauthorized errors, how to read the response, and how to fix them fast.
How to Fix CORS Errors When Testing APIs
CORS errors blocking your API tests? Learn what triggers them, how to read the preflight request, and the fastest ways to fix CORS when testing APIs.
SOAP vs REST: Which One Should You Use?
Compare SOAP vs REST in 2026. Learn the differences in speed, security, XML vs JSON, performance, and when to choose SOAP or REST APIs
Kanishk Rawat · Mar 31, 2026
What Is a SOAP API? Complete Beginner Guide
SOAP APIs have been around for more than two decades, but they are still widely used in banking, healthcare, telecom, travel, insurance, and enterprise sof...
Kanishk Rawat · Mar 30, 2026
How to Organize API Requests When Testing Multiple Scenarios
Testing APIs across multiple scenarios doesn't have to be messy. Learn how to structure, name, and organize API requests so your team can test faster, debug easier, and stay aligned.
Kanishk Rawat · Mar 18, 2026
10 Practical Script Examples for API Testing
10 practical script examples for API testing covering validation, authentication, chaining requests, negative testing, and business logic checks with real-world scenarios.
Kanishk Rawat · Feb 24, 2026
How to Write Scripts to Validate API Response Data
When you’re building or debugging a frontend, the real problems usually don’t show up until the API response hits the browser. Everything may look fine in i...
Kanishk Rawat · Feb 24, 2026
What is cURL? Complete Guide to cURL Commands, Options & API Testing
cURL is one of those tools that every developer encounters at some point in their career. Whether you're testing APIs, debugging network issues, or automati...
Kanishk Rawat · Feb 12, 2026
Mock APIs Locally: Client-Side HTTP Interception Guide
Client-side HTTP interception lets you mock APIs directly in the browser—no servers or env hacks. Requestly keeps mocks realistic, reversible, and fast.
Testing in Production Safely with HTTP Interception
Testing in production is already happening. HTTP request interception with Requestly makes it safe, controlled, and reversible—without touching real users.
🚀 React 19 in 2025 — What’s New, Why It Matters, and How to Migrate from React 18
Discover what's new in React 19, why it matters, and how to migrate from React 18 effortlessly for optimized performance and simpler coding.
Managing Security in API Testing: Complete Guide
Managing security during API testing is crucial. Learn the risks of cloud tools and why a local-first workflow like Requestly keeps your data safer.
AI-Powered Frontend Dev: Copilot, Cursor & Figma MCP
Unlock the future of frontend development with AI tools like Copilot and Cursor to supercharge your coding efficiency and creativity.
What is a Reverse Proxy and How Does It Work?
Learn more about how a reverse proxy boosts speed, security, and scalability by routing requests, blocking threats, and protecting your backend servers.
Kanishk Rawat · Nov 25, 2025
How to Use the if() Function in CSS
Learn how to use the if() function in CSS to add conditional logic directly in your styles, enhancing flexibility without JavaScript.
Dinesh Thakur · Nov 21, 2025
How Lodash Can Simplify Your API Testing
Learn how to enhance your API testing in Requestly by importing Lodash and other libraries for effective data transformation and manipulation.
Kanishk Rawat · Nov 17, 2025
Choosing the Best REST API Client Tools for Your Project
Discover how to choose the best REST API client tools for your project with key features, comparison tips, and top tool recommendations
Parth Bhardwaj · Oct 17, 2025
How to ace API Testing with Requestly
Master API testing with Requestly to securely debug locally, streamline development, and enhance your workflow efficiency without cloud risks.
How to develop a SaaS Product? From Idea to Scale
Discover how to build a SaaS product from idea to scale. Learn about ideation, MVP, launch, PMF, and growth strategies with practical tips.
Sagar Soni · Feb 11, 2025
Best Open Source API Mocking Tool (With Examples)
Learn how to quickly mock REST and GraphQL APIs using Requestly. Speed up your frontend development and test without backend dependencies.
Sagar Soni · Dec 2, 2024
How to Intercept network on iOS simulator?
Discover how to intercept network traffic in iOS simulator with Xcode. Enhance your app development workflow for better debugging and performance
Dinesh Thakur · Oct 21, 2024
How to setup Charles proxy
In this article, we will walk you through setting up Charles Proxy from scratch so that you can intercept network requests quickly. Afterward we will take a look at a tool that provides similar functionality but with a modern and easy-to-use UI.
Dinesh Thakur · Sep 26, 2024
How to migrate from Charles Proxy
Compare Charles Proxy and Requestly features. Learn how to migrate your settings and leverage Requestly's advanced capabilities. Migrate today!
Dinesh Thakur · Sep 13, 2024
How to Setup an Apple Mac for Software Development
Learn how to configure your Mac for optimal software development. Security, tools, environment setup, and more.
Sagar Soni · Sep 9, 2024
How to use Chrome DevTools as a Request Interceptor
Unlock the power of Chrome DevTools as a request interceptor to enhance your web development skills by effortlessly modifying network requests.
Dinesh Thakur · Sep 6, 2024
How to Implement HTTP Interceptors in JavaScript Frameworks
There are 2 types of HTTP Interceptors, one facilitates API communication internally, other works externally enabling you to control the behavior of APIs.
Dinesh Thakur · Sep 3, 2024
Debugging Network Requests Using Flutter HTTP Interceptor
How to debug network requests using Flutter HTTP interceptors. Enhance your app's performance by modifying, and analyzing API requests and responses
Kanishk Rawat · Aug 23, 2024
How to redirect prebid.js to staging server for testing?
Discover how to easily load development version of Prebid.js on production into your local browser for smooth delivery.
Kanishk Rawat · Aug 14, 2024
Monitor & Debug APIs with Chrome Request Interceptors
Learn to monitor and debug APIs using Chrome request interceptors. Improve API development with these powerful techniques.
Kanishk Rawat · Aug 13, 2024
HTTP Interceptors for API Rate Limiting and Throttling
Learn how to implement API Rate Limiting and Throttling in your Angular and React applications using HTTP interceptors for optimal performance.
Kanishk Rawat · Aug 9, 2024
Understanding Angular Interceptors : Beyond HTTP
Discover how Angular interceptors enhance your app with advanced request handling, security, performance optimization, and modular solutions.
Kanishk Rawat · Aug 6, 2024
How to implement Axios Interceptor in React?
Learn to implement Axios interceptors in React for improved request handling and error management with this easy-to-follow guide!
Dinesh Thakur · Aug 2, 2024
How to Create an Angular HTTP Interceptor from Scratch
Learn how to create Angular HTTP interceptors for efficient API request handling, improved security, and streamlined code.
Kanishk Rawat · Jul 26, 2024
How to implement Axios Request Interceptors in Next.js
Learn how to implement Axios request and response interceptors in Next.js. Improve your API handling and streamline development. Read now!
Dinesh Thakur · Jul 25, 2024
How to Load Staging GraphQL APIs on Local Apps
Let’s explore how you can speed up your local development with GraphQL APIs using Replace Rule.
Sagar Soni · Jul 23, 2024
How to make non-intrusive GraphQL API Mocks
Learn how to create non-intrusive GraphQL API mocks using Requestly. Develop frontend features in parallel without hardcoding responses.
Sagar Soni · Jul 23, 2024
How to Override GraphQL API Query & Mutations
Learn how to override GraphQL API queries and mutations using Requestly. Modify request bodies programmatically for testing and development. Read now!
Sagar Soni · Jul 23, 2024
How to Override GraphQL API Responses
Frontend developers often need to test their code with variations in API responses. In this post, learn how to override GraphQL API responses.
Sagar Soni · Jul 23, 2024
Top Google Chrome Extensions for HTTP Interception
HTTP Request interception in web development can improve your local dev & testing workflows, having the right tool is important. Checkout this comparison.
Sagar Soni · Jul 23, 2024
What is HTTP Interceptor & Why Should You Use One?
Unlock the potential of your web applications by learning how HTTP interceptors can enhance performance, security, and maintainability in your development process.
Dinesh Thakur · Jul 19, 2024
Best Chrome Extensions for QAs in 2024
From automating repetitive tasks to enhancing visibility and control over web applications, these chrome extensions for QAs are essential.
Sagar Soni · Jul 16, 2024
How to Speed Up Your Development Process using Mock API
Save time in software development by using mock API! This article explores how mock APIs streamline your workflow.
Kanishk Rawat · Jun 4, 2024
What is API Mocking and Why is it Important?
Learn about API mocking, its benefits (faster development, easier testing), and common use cases. Discover how to streamline your development workflow.
Sagar Soni · May 28, 2024What is API Mocking & Why its important to create Mock API?
Learn about API mocking, its benefits (faster development, easier testing), and common use cases. Discover how to streamline your development workflow.
Sagar Soni · May 28, 2024
Top interview questions for frontend developer
Landing a frontend developer job can be tough due to many technologies and competition. This guide will equip you with core knowledge to ace those interviews.
Sagar Soni · May 21, 2024
How to Inject Javascript on a webpage with custom attributes
Insert script with attributes like defer, async, nomodule, crossorigin, integrity, referrerpolicy, data-*, etc.
Sagar Soni · Feb 27, 2024
Test SaaS Products on Live Sites Without Integration
Learn how to use Requestly to test your SaaS product on live websites locally, simulating integration without affecting the actual site.
Sagar Soni · Dec 22, 2023
How to override API request body using Javascript
Learn how to override API request bodies using Javascript for testing and development. Use Requestly to easily modify request payloads
Rohan Mathur · Dec 13, 2023
How to Serve API Responses Locally Without Hitting Server
Learn how to serve API responses locally for testing and development, even when the backend isn't ready. Use Requestly to mock API responses. Read now!
Sagar Soni · Dec 13, 2023
How to Test Your Website for Unusual Scenarios
As a web developer or QA, you need to test your website with different scenarios. Requestly helps simulate these scenarios without modifying the code.
Nafees Nehar · Dec 13, 2023
How to add a Random Query Parameters to Prevent Caching?
Learn how to add a random query parameter to a URL to bypass caching and ensure fresh content. Use Requestly to automate this process. Read now!
Sagar Soni · Nov 22, 2023
How to block a URL in Chrome, Firefox & Safari
Easily block URLs in Chrome, Firefox, and Safari to minimize distractions and enhance your browsing experience with this simple guide.
Sagar Soni · Nov 22, 2023
How to change a part in the URL (e.g. domain) while keeping the rest of the URL same?
Learn how to easily change parts of a URL, like the domain, while keeping the rest the same. Use Requestly to simplify URL manipulation. Read now!
Sagar Soni · Nov 22, 2023
How to inject a script before page load on a website?
Learn how to inject a script before page load on a website using Requestly. Customize website behavior and automate tasks. Read now!
Sagar Soni · Nov 22, 2023
How to modify HTTP Headers in Android and IOS Apps/Browsers?
Learn how to modify HTTP headers in Android and iOS apps and browsers using Requestly. Control network traffic for testing and development. Read now!
Sagar Soni · Nov 22, 2023
How to modify HTTP Headers in Chrome, Firefox, Edge & Safari browsers?
Learn how to modify HTTP headers in Chrome, Firefox, Edge, and Safari. Control network traffic for testing, development, and more. Read now!
Sagar Soni · Nov 22, 2023
How to modify QueryParameters in URL on the fly?
Learn how to modify query parameters in URL on the fly using Requestly for effective debugging and enhanced web application customization.
Sagar Soni · Nov 22, 2023
Switch API Endpoints Between Environments Easily
Learn how to quickly switch API endpoints between environments (e.g., production to local) for testing and development using Requestly. Read now!
Sagar Soni · Nov 22, 2023
How to throttle (or add a custom delay to) an API request?
Learn how to throttle API requests for better testing with custom delays using the Requestly Chrome extension to improve your web app performance.
Sagar Soni · Nov 22, 2023
Replace Rule Documentation
Replace Rule is commonly used ruleType provided by Requestly. As the word replace indicates it allows users to replace a string (or matching pattern) with another string in the url. It looks to be ver
Kanishk Rawat · Nov 26, 2022