Hoppscotch

Hoppscotch is an open-source API development ecosystem designed to streamline how developers build, test, and debug HTTP, WebSocket, GraphQL, and other API-based workflows. Accessible directly from the browser, it focuses on speed, simplicity, and collaboration, helping teams prototype and iterate on APIs more efficiently. Its primary purpose is to provide a lightweight yet capable alternative to traditional API clients and suites, with an emphasis on developer productivity and a clean, minimal interface.

The platform supports creating and organizing requests with multiple methods, headers, query parameters, and authentication schemes, including Bearer tokens and API keys. It offers real-time WebSocket and SSE testing, GraphQL query execution, and support for REST and gRPC workflows. Collections, environments, and variables allow users to structure complex API projects and switch between configurations for different stages such as development, staging, and production. Built-in features like code generation for multiple languages, response inspection, history, and import/export (including Postman collections) make it easy to integrate Hoppscotch into existing toolchains.