Ganesh Joshi

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HTTP status codes

Updated 2026-02-09

Common HTTP response codes: 2xx success, 3xx redirect, 4xx client error, 5xx server error. REST and APIs.

1xx Informational

```
100 Continue
```
Client should continue or ignore if finished.
```
101 Switching Protocols
```
Server switching protocol (e.g. WebSocket).
```
102 Processing
```
Processing continues (WebDAV).
```
103 Early Hints
```
Link header for preloading.

2xx Success

```
200 OK
```
Request succeeded.
```
201 Created
```
Resource created (e.g. POST).
```
202 Accepted
```
Accepted for processing; not yet completed.
```
204 No Content
```
Success, no body (e.g. DELETE).
```
206 Partial Content
```
Partial content (range request).

3xx Redirect

```
301 Moved Permanently
```
Permanent redirect; cacheable.
```
302 Found
```
Temporary redirect.
```
303 See Other
```
Redirect to another resource (usually GET).
```
304 Not Modified
```
Use cached version (conditional GET).
```
307 Temporary Redirect
```
Temporary redirect; method and body unchanged.
```
308 Permanent Redirect
```
Permanent redirect; method and body unchanged.

4xx Client error

```
400 Bad Request
```
Invalid request body or params.
```
401 Unauthorized
```
Authentication required.
```
403 Forbidden
```
No permission.
```
404 Not Found
```
Resource does not exist.
```
405 Method Not Allowed
```
HTTP method not allowed for this resource.
```
408 Request Timeout
```
Server timed out waiting for request.
```
409 Conflict
```
Request conflicts with current state.
```
415 Unsupported Media Type
```
Payload format not supported.
```
422 Unprocessable Content
```
Syntax valid but semantic errors.
```
429 Too Many Requests
```
Rate limit exceeded.

5xx Server error

```
500 Internal Server Error
```
Server-side failure.
```
501 Not Implemented
```
Server does not support the functionality.
```
502 Bad Gateway
```
Invalid response from upstream.
```
503 Service Unavailable
```
Overloaded or down.
```
504 Gateway Timeout
```
Upstream did not respond in time.
```
505 HTTP Version Not Supported
```
HTTP version not supported.

HTTP status codes | Cheatsheet | Ganesh Joshi