Built by DevEmbers

Rex — API Client

A fast, keyboard-driven REST API client for VS Code. Test HTTP requests, GraphQL, WebSockets, and SSE without leaving your editor.

Main View

Features

HTTP requests — GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS with query params, headers, and body editors
Multiple body types — JSON (with syntax highlighting), raw text, form data with file uploads, URL-encoded, GraphQL, or none
Authentication — Bearer, Basic, API Key, OAuth 2.0 (Authorization Code, Client Credentials, PKCE), AWS Signature V4, Digest
Response viewer — syntax-highlighted JSON, HTML preview, image rendering, PDF viewer, hex dump for binary
Real-time streaming — Server-Sent Events and WebSocket connections with live message logs
Collections — save, organize, and drag-and-drop requests into collections
Environments — create variable sets and reference them with {{variable}} syntax anywhere in requests
History — every request logged with full response, searchable, with side-by-side diff viewer
Request chaining — build sequences of dependent requests with variable passing and test assertions
Pre-request & test scripts — JavaScript scripting API for dynamic headers, variables, and response testing
GraphQL — dedicated editor with schema introspection and autocomplete
Code generation — generate snippets in JavaScript, Python, cURL, and more
API docs browser — load OpenAPI 3.x / Swagger 2.0 specs and browse endpoints with "Try it" support
Import & export — Postman collections, OpenAPI/Swagger, HAR files, cURL commands