HTTP Status Codes
Reference list of HTTP status codes
100
Continue
The server has received the request headers and the client should proceed to send the request body.
200
OK
The request succeeded. The result meaning depends on the HTTP method.
201
Created
The request succeeded, and a new resource was created as a result.
204
No Content
There is no content to send for this request, but the headers may be useful.
301
Moved Permanently
The URL of the requested resource has been changed permanently.
302
Found
The URI of requested resource has been changed temporarily.
304
Not Modified
Used for caching purposes. It tells the client that the response has not been modified.
400
Bad Request
The server cannot or will not process the request due to an apparent client error.
401
Unauthorized
The request requires user authentication.
403
Forbidden
The client does not have access rights to the content.
404
Not Found
The server can not find the requested resource.
405
Method Not Allowed
The request method is known by the server but is not supported by the target resource.
429
Too Many Requests
The user has sent too many requests in a given amount of time.
500
Internal Server Error
The server has encountered a situation it does not know how to handle.
502
Bad Gateway
The server received an invalid response from the upstream server.
503
Service Unavailable
The server is not ready to handle the request (overloaded or maintenance).
504
Gateway Timeout
The server did not get a response in time from the upstream server.
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What is HTTP Status Codes?
HTTP status codes are 3-digit numbers that web servers return to indicate the result of a request. Knowing what 404, 500, 301, 401, 403, and 429 mean — and when to use each — is essential for API development and debugging. DailyDevTools' HTTP Status Code Reference provides a searchable list of all standard status codes with descriptions, common causes, and suggested fixes.
How to use HTTP Status Codes
- 1Search for any status code (e.g., 404) or keyword (e.g., 'unauthorized') in the search box
- 2Browse codes by category: 1xx Informational, 2xx Success, 3xx Redirection, 4xx Client Error, 5xx Server Error
- 3Click any status code to expand its full description, common causes, and how to resolve it
- 4Use the code as a quick reference when debugging API responses in your applications