Skip to content
HTTP

Status Codes

Five classes of response codes.

By EZ4Code Team
statusresponse

Code

# 1xx Informational
100 Continue

# 2xx Success
200 OK
201 Created
204 No Content

# 3xx Redirection
301 Moved Permanently
302 Found
304 Not Modified

# 4xx Client Error
400 Bad Request
401 Unauthorized
403 Forbidden
404 Not Found
429 Too Many Requests

# 5xx Server Error
500 Internal Server Error
502 Bad Gateway
503 Service Unavailable

Explanation

HTTP status codes are grouped by leading digit: 1xx informational, 2xx success, 3xx redirection, 4xx client error, and 5xx server error. 401 means missing or invalid credentials while 403 means authenticated but not permitted. 304 enables conditional requests by telling caches the representation is still fresh.

More HTTP Snippets

Methods

Core HTTP request methods.

Headers

Common request and response headers.

Caching

Cache-Control, ETag, and conditional requests.

Cookies

Set, send, and expire cookies.

Authentication

Basic, Bearer, and challenge responses.

Content Negotiation

Negotiate representation with Accept headers.