What is JSONing Mock API?
Free and open-source fake API to test and prototype. It allows you to instantly generate a fully functional API from any JSON object. You can create rules to handle errors and customize HTTP codes, headers, and responses. The tool is completely free to use, and you can access the source code to run it locally.
Problem
Developers and testers need to manually set up mock APIs for testing and prototyping, which is time-consuming, error-prone, and lacks flexibility for rapid iteration when modifying HTTP codes, headers, or responses.
Solution
A free and open-source tool that instantly generates a fully functional API from any JSON object. Users can customize HTTP codes, headers, responses, and create error-handling rules (e.g., simulate 404 errors or rate limits).
Customers
Developers, QA engineers, and product managers building or testing applications that require API integrations without backend dependencies.
Unique Features
Open-source, locally deployable, instant API generation without registration, and customizable error rules with JSON input flexibility.
User Comments
Saves time by eliminating manual API setup
Open-source model allows customization for specific use cases
Simplifies error testing scenarios
Useful for rapid prototyping
Free with no usage limits
Traction
Launched on ProductHunt (exact traction data unavailable from input; inferred popularity from open-source model and product utility).
Market Size
The global API management market is projected to reach $4.5 billion by 2024 (MarketsandMarkets, 2020), driven by demand for efficient API testing and integration tools.
