Endpoint Studio – API Client for REST, GraphQL & WebSocket

Test REST, GraphQL, WebSocket and SSE APIs in a tab: collections, environments, auth, tests, runner and code generation. Local-only.

Endpoint Studio is an API client that runs in a browser tab. Build a request, press Send and read the response, then save it to a collection so you can run it again later. There is no account to create and nothing to sign in to: your requests, variables and history stay on your device. Build requests quickly Type a URL, pick a method and add query parameters, headers and a body in simple tables that stay in sync with the address bar. Paste a cURL command and it becomes a ready-to-send request. Because Endpoint Studio runs as an extension, your requests are not blocked by the browser's cross-origin rules. Handle authentication once Choose the sign-in method your API uses and set it on a whole collection or folder, so every request inside inherits it. OAuth 2.0 sign-in opens in a secure browser window, and tokens are kept on your device. Understand every response See the status, time and size at a glance. Responses are formatted and searchable, and you can switch to the raw view, preview HTML and images, or inspect headers, cookies and redirects. Stay organised Group requests into collections and folders, and switch between environments such as local, staging and production without editing each request. Variables work everywhere and secret values are masked. Every request you send is saved to a searchable history. Test and automate Write small test scripts to check status codes and response data, pass values from one request to the next, and run a whole collection in one click, optionally repeating it with rows from a data file. Export the results as a report. Bring your work with you Import existing collections and API specifications, export your own collections to share them or keep them in Git, and copy any request as ready-to-use code for your project. Real-time APIs Connect to WebSocket servers and event streams and watch messages arrive live. Comfortable to use A command palette and keyboard shortcuts keep your hands on the keyboard. The interface is available in English and Arabic, in dark and light themes. Private by design Requests go straight from your browser to the servers you choose. Endpoint Studio has no servers of its own, no analytics and no tracking, and it never reads the pages you browse.