Hoppscotch

Hoppscotch is a web-based API client that lets you send HTTP requests and inspect responses without leaving your browser. You can create and test REST, GraphQL, WebSocket, and other API calls with a clean interface. It supports various authentication methods, custom headers, query parameters, and request bodies. The tool runs entirely in your browser, which means your API data doesn't pass through external servers.

The interface is organized into tabs for different parts of the request process: Parameters, Body, Headers, Authorization, and both Pre-request and Post-request Scripts. You can write JavaScript snippets to automate tasks before sending requests or after receiving responses. The environment system lets you manage variables for different setups, and collections help organize your API endpoints.

Developers working on frontend or backend projects will find Hoppscotch useful for quick API checks during development. QA engineers can use it to verify endpoints and write test scripts. Teams can share requests through collections or generate code snippets for different programming languages. It's particularly handy when you need to test an API quickly without installing desktop software.