Decoy

This application allows developers to create and manage local mock servers on their Macs, enabling simulation of API endpoints, webhook requests, and server responses without relying on cloud services or containerization. Key features include defining method and path pairs grouped into projects, real-time request monitoring with detailed headers and payload inspection, customizable mock responses with various body types and delay simulations, automatic CORS handling, support for file serving and redirects, exporting requests as code snippets, parameterized paths, and persistent storage with SQLite for reliability. Designed for software testers, backend developers, API integrators, and quality assurance professionals, it addresses challenges such as testing failure scenarios, debugging API interactions, and developing client applications independently of live backend servers.

Decoy can be found in API Testing Tools categories.