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Quick reference for HTTP response classes and common API/web error diagnostics.
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Search for a status code or class group.
Review the response meaning and common causes.
Map the code to client/server handling logic.
Apply fixes and revalidate request behavior.
API integration troubleshooting
Backend response design reviews
Frontend error handling validation
Support incident diagnosis
Status-code reference pages perform best when they are concise and easy to navigate. This page focuses on that practical debugging intent.
It helps teams reduce diagnosis time by quickly mapping response codes to likely causes and next actions.
Log response status with request context (method, route, correlation ID) to resolve production issues faster.
62 status codes found
HTTP stands for Hypertext Transfer Protocol. Common methods:
| Method | Description | Safe | Idempotent |
|---|---|---|---|
| GET | Retrieve a resource | Yes | Yes |
| POST | Create a resource or submit data | No | No |
| PUT | Replace a resource | No | Yes |
| PATCH | Partially update a resource | No | No |
| DELETE | Delete a resource | No | Yes |
| HEAD | Same as GET but headers only | Yes | Yes |
| OPTIONS | Describe communication options | Yes | Yes |
| CONNECT | Establish tunnel (e.g. SSL) | No | No |
| TRACE | Message loop-back test | Yes | Yes |