Gapfy Echo is a modern Windows desktop API client that enables developers and teams to design, send, and debug requests across HTTP, REST, gRPC, GraphQL, and WebSocket protocols. It offers features like request chaining, environment management, mock servers, and optional AI assistance for efficient API development and testing.
In the API design, testing & docs space, Gapfy Echo takes a focused approach. Testing, debugging, and managing API requests across multiple protocols in a unified desktop client. Gapfy Echo is a B2B product aimed at developers. There is a free tier. Gapfy Echo is available on Windows.
Gapfy Unipessoal Lda builds and maintains Gapfy Echo, and the product first shipped in 2026. Across PulseGate's embedding index, Gapfy Echo has few near neighbours, marking it as relatively distinct. Among its 10 catalogued features are API requests, gRPC support, and graphQL support.
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