The Requestly blog
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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.
What is cURL? A Complete Guide to Commands & Testing
A complete, example-driven guide to cURL — what it is, the options you'll actually use, and how to import cURL commands into Requestly for visual API testing.
Kanishk Rawat · Jun 11, 2026
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.
Endpoint ft. Manish Verma: QA Mindset & Automation Myth
Meet the thinkers and builders shaping software’s future. Endpoint by Requestly brings real-world insights and hard-earned lessons from industry leaders.
Kanishk Rawat · Apr 9, 2026
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
Introducing Examples in Requestly
Request Examples in Requestly help you save, reuse, and manage API request variations easily. Test scenarios faster without duplicating requests.
Kanishk Rawat · Mar 18, 2026
Best Postman Alternative in 2026: Faster API Client for Developers
Postman’s 2026 pricing changes ended free team collaboration. Discover why developers are switching to Requestly
Akanksha Bhadauria · Mar 12, 2026
Import Postman Collections into Requestly: Migration Guide
Learn how to import Postman collections and environments into Requestly. Follow this step-by-step guide to migrate your API workflows easily.
Kanishk Rawat · Mar 10, 2026
Introducing Dynamic Variables: Generate Realistic Test Data Instantly
Dynamic variables are built-in values that are generated automatically at request execution time. No manual edits. No helper scripts. No duplicate test data...
Kanishk Rawat · Mar 2, 2026
Endpoint ft. Ijeoma Okereafor: On the human element of testing and ecosystem quality
Endpoint by Requestly spotlights tech leaders who don’t follow trends but define them, sharing real-world insights shaping the future of software.
Kanishk Rawat · Feb 25, 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
302 Temporary Redirect: What It Is & How to Use It
Explore 302 Permanent Redirects, their role in SEO, and how to implement them correctly for improved site performance and rankings.
Parth Bhardwaj · Feb 13, 2026
3xx HTTP Status Codes: Redirection Explained
Learn key 3xx redirection codes, their meanings, and how they handle URL changes and redirects.
Parth Bhardwaj · Feb 13, 2026
HTTP 426 Upgrade Required: Causes and Fixes Explained
Learn about the HTTP 426 Upgrade Required error, its causes, and how to resolve it for better site performance and user experience
Parth Bhardwaj · Feb 13, 2026
Understanding 4xx Client Errors: Causes & Solutions
Explore common 4xx client errors, their causes, and how to troubleshoot and fix them effectively.
Parth Bhardwaj · Feb 13, 2026
API Integration Example: Step-by-Step Guide for Developers
Learn how to integrate APIs with practical examples and clear explanations for seamless connectivity.
Parth Bhardwaj · Feb 13, 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
How to convert OpenAPI spec to an API collection
Easily convert your OpenAPI spec into a fully organized API collection with Requestly—no manual setup required for fast and accurate testing.
Kanishk Rawat · Feb 11, 2026
Requestly Launches AI Test Authoring for API Test Scripts
Requestly introduces AI Test Authoring, allowing developers to automatically generate and refine API test scripts for faster, smarter testing.
Sagar Soni · Jan 22, 2026
Top Builds at PEC Hacks 3.0: MetalliSense Wins
Explore top builds from PEC Hacks 3.0 and discover how MetalliSense leveraged AI and Requestly for innovative real-time metal analysis.
Akanksha Bhadauria · Jan 19, 2026
Mastering GraphQL Subscriptions
Learn how to define, implement, and optimize GraphQL subscriptions for real-time updates with practical tips for secure and performant APIs.
Rohan Mathur · Dec 31, 2025
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.
Understanding the Cookie Header
Understand how the Cookie header works and learn to test, debug, and modify it in real time using Requestly HTTP Interceptor.
Nafees Nehar · Dec 19, 2025
Mastering GraphQL Scalars: Built-in & Custom Type Guide
Unlock the power of GraphQL scalars with our guide on built-in and custom types, enhancing your API design for robust application development.
Rohan Mathur · Dec 19, 2025
How to Do an Accessibility Audit: Step-by-Step Guide
Learn how to do an accessibility audit with this step-by-step guide. Identify issues, use the right tools, and ensure ongoing compliance.
Nafees Nehar · Dec 19, 2025