HTTP / 01

HTTP guides

Understand the protocol behind each request.

HTTP methods and idempotency

Choose the right HTTP method and understand when repeating a request is safe.

Read guide ↗02 / HTTP

HTTP headers and request bodies

Learn how headers describe a request and how to choose a body format.

Read guide ↗03 / HTTP

How to read HTTP status codes

Use status codes to separate successful responses, client errors and server errors.

Read guide ↗04 / HTTP

CORS and browser HTTP requests

Understand why a request works in cURL but fails in a web page.