Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

HTTP

The language browsers and programs use to ask servers for things over the web.

HTTP is a request/response protocol: a client sends a method, target, headers and optional body; the server replies with a status code, headers and optional body. HTTPS is HTTP over TLS.

Loading interactive…

Examples

  • GET /api/orders/42 asks a server for order 42; the reply starts with a status line such as HTTP/1.1 200 OK.

Read the full section →