2xx Success HTTP Codes
The 2xx (Success) class of status codes indicates that the client's request was successfully received, understood, and accepted by the server. Using the correct 2xx status code is the foundation of well-architected, predictable RESTful APIs.
OK
The request succeeded. The result meaning depends on the HTTP method.
Created
The request succeeded, and a new resource was created as a result.
Accepted
The request has been received but not yet acted upon.
Non-Authoritative Information
The request was successful but the payload has been modified by a transforming proxy.
No Content
The server successfully processed the request and is not returning any content.
Reset Content
The server successfully processed the request, asks that the requester reset its document view.
Partial Content
The server is delivering only part of the resource (byte serving) due to a range header.
Multi-Status
Conveys information about multiple resources, for situations where multiple status codes might be appropriate.
Already Reported
Used inside a DAV: propstat response to avoid enumerating internal members of multiple bindings repeatedly.
IM Used
The server has fulfilled a GET request for the resource, and the response is a representation of the result of one or more instance-manipulations.
💡Understanding 2xx Success Codes
Why These Status Codes Matter
Beyond a generic 200 OK, using specific codes like 201 Created (with a Location header), 202 Accepted (for asynchronous queues), and 204 No Content (for DELETE actions) allows frontend clients and API consumers to handle state transitions with zero ambiguity.
Diagnostic & Troubleshooting Strategy
Ensure your backend controllers return the exact semantic 2xx code. For 204 No Content, make sure the response body is strictly empty to prevent client-side JSON parsing errors.
Frequently Asked Questions About 2xx Codes
What is the difference between 200 OK and 201 Created?
200 OK indicates general success where the payload contains the result. 201 Created explicitly indicates that a new resource was created as a result of a POST request, typically accompanied by a Location header.
When should an API return 204 No Content?
Return 204 No Content when an operation succeeds (such as deleting a record or saving an update) but there is no response payload necessary to send back to the client.
How does 206 Partial Content enable video streaming?
206 Partial Content responds to HTTP Range headers, allowing media players to request specific byte ranges of audio and video files for smooth seeking and buffering.