API Challenges Blog
Short posts about REST APIs, API testing practice, interactive tutorials, tools, and updates to API Challenges.
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API From Hell and other fun updates
Standalone API From Hell implementations are now available for local REST client and proxy testing, with conformance checks and new practice site links.
Categories: Change Log
Simple API Testing Experiments For API Test Planning
Use the Simple API experiments page as a practical source of API test plan, test approach, and exploratory testing ideas.
Categories: Change Log, API Testing, REST API Tutorial
Accept q Values, JSON, XML, And New API Challenges
API Challenges now includes richer Accept header negotiation for q values, JSON, XML, and structured media type variations.
Categories: Change Log, API Testing, HTTP Headers
Structured JSON QUERY Request Body Support
API Challenges now supports Structured JSON request bodies for the HTTP QUERY method.
Categories: Change Log, API Testing, HTTP Methods
JSONPath QUERY Request Body Support
API Challenges now supports JSONPath request bodies for the HTTP QUERY method.
Categories: Change Log, API Testing, HTTP Methods
Multiple Online Open API Embedded Clients
Added support for multiple Online Open API Embedded Clients to compare for testing and documentation.
Categories: Tools
API Spector Review: Best New API Client for API Testing
Review API Spector as a modern API client for exploratory API testing, OpenAPI contract checks, fuzzing, and local Git-friendly workflows.
Categories: Tools, API Testing, API Client Reviews
Interactive API Simulator Walkthrough Launch
Introducing the interactive API simulator walkthrough for practising safe API requests and comparing request methods.
Categories: API Testing, API Simulator
Interactive REST API Tutorial and Raw Response View
Learn why the REST API tutorial and raw response viewer help beginners understand REST APIs by sending requests and inspecting complete responses.
Categories: Change Log, REST API Tutorial, API Testing
API Challenges Site Refresh and Hosted API Clients
A fuller explanation of the API Challenges site refresh, progress tracking improvements, hosted API clients, and tester OpenAPI tools.
Categories: Change Log, API Testing, Tools
PATCH Support for API Challenges and Simple API
Learn what PATCH support adds to API Challenges and Simple API, including partial JSON, JSON Merge Patch, and JSON Patch styles.
Categories: Change Log, HTTP Methods, API Testing
QUERY Method Support and Versioned OpenAPI Docs
A practical explanation of QUERY method support, versioned OpenAPI files, permissive specs, and downloadable API documentation.
Categories: Change Log, OpenAPI, HTTP Methods
curl.exe Support and API From Hell Practice Mode
Learn why the curl.exe option helps Windows users and how API From Hell challenges REST clients with difficult responses.
Categories: Change Log, Tools, API Testing
Expanded Status Codes and Inline API Clients Update
A guide to the status code, inline client, Swagger UI, and navigation changes added to API Challenges in July 2026.
Categories: Change Log, HTTP Status Codes, API Testing
API Challenges Repo Move and Swagger UI Updates
Learn why the API Challenges GitHub repo move, inline simulator widgets, and Swagger UI pages improve API testing practice.
Categories: Change Log, OpenAPI, API Testing