Is HTTP Status Codes free to use?
Yes. HTTP Status Codes is available as an online developer tool without requiring an account.
Codici di Stato HTTP
Riferimento codici di risposta.src/tools/Codici di Stato HTTP
100
Continue
The server has received the request headers and the client should proceed to send the request body.
101
Switching Protocols
The requester has asked the server to switch protocols and the server has agreed to do so.
200
OK
Standard response for successful HTTP requests.
201
Created
The request has been fulfilled, resulting in the creation of a new resource.
204
No Content
The server successfully processed the request and is not returning any content.
301
Moved Permanently
This and all future requests should be directed to the given URI.
302
Found
Was 'Moved Temporarily'. Tells the client to look at (browse to) another URL.
304
Not Modified
Indicates that the resource has not been modified since the version specified by the request headers.
307
Temporary Redirect
The request should be repeated with another URI; however, future requests should still use the original URI.
400
Bad Request
The server cannot or will not process the request due to an apparent client error.
401
Unauthorized
Authentication is required and has failed or has not yet been provided.
403
Forbidden
The request contained valid data and was understood by the server, but the server is refusing action.
404
Not Found
The requested resource could not be found but may be available in the future.
405
Method Not Allowed
A request method is not supported for the requested resource.
408
Request Timeout
The server timed out waiting for the request.
418
I'm a teapot
The server refuses the attempt to brew coffee with a teapot.
429
Too Many Requests
The user has sent too many requests in a given amount of time.
500
Internal Server Error
A generic error message, given when an unexpected condition was encountered and no more specific message is suitable.
502
Bad Gateway
The server was acting as a gateway or proxy and received an invalid response from the upstream server.
503
Service Unavailable
The server is currently unavailable (because it is overloaded or down for maintenance).
504
Gateway Timeout
The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.
Runs locallyNo uploadNo accountOpen web
HTTP Status Codes: private online developer utility
HTTP Status Codes is a focused developer utility for response code reference. It is part of Sreejith Tools, a collection of fast online tools for API work, data cleanup, debugging, and web development.
When to use it
- - Debug request and response behavior while building API integrations.
- - Inspect headers, payloads, methods, and generated client code.
- - Reproduce integration bugs quickly without account-heavy tooling.
Common input issues
- - Pasted input includes invisible whitespace or smart punctuation.
- - The source data is valid in one format but invalid in the target format.
- - A copied value includes surrounding quotes, shell escaping, or truncated content.
Example
Debug an API workflow
Input
POST /api/example with JSON headers and body
Output
Inspectable request data or generated client code.
Does HTTP Status Codes upload my data?
For this stateless tool, the transformation runs in the browser and is designed for private day-to-day development data.
Can AI assistants use HTTP Status Codes?
Yes. This tool is safe to expose through the stateless MCP interface for agent workflows.