Developer Tool

HTTP Status Reference

Quick-reference for all HTTP status codes with descriptions and common use cases.

32 status codes

100

Continue

Server received the request headers; client should proceed.

101

Switching Protocols

Server is switching protocols as requested (e.g., WebSocket upgrade).

102

Processing

Server has received and is processing the request, no response yet.

103

Early Hints

Used to return some response headers before final HTTP message.

200

Request succeeded. Response body contains the result.

GET requests, successful reads

201

Created

Request succeeded and a new resource was created.

POST requests, resource creation

202

Accepted

Request accepted for processing, but not yet completed.

Async operations, job queues

204

No Content

Request succeeded but no content to return.

DELETE requests, empty responses

206

Partial Content

Server is delivering only part of the resource (range requests).

File downloads, video streaming

301

Moved Permanently

Resource has been permanently moved to a new URL.

URL redirects, SEO migrations

302

Found

Resource temporarily located at a different URL.

Temporary redirects

304

Not Modified

Cached version is still valid; no need to re-download.

Browser caching, ETags

307

Temporary Redirect

Request should be repeated at the new URL, method preserved.

Method-safe temporary redirects

308

Permanent Redirect

Resource permanently at new URL; method and body preserved.

Permanent redirects preserving POST

400

Bad Request

Server cannot process the request due to client error.

Validation errors, malformed input

401

Unauthorized

Authentication required and has failed or not been provided.

Missing/invalid auth token

403

Forbidden

Client authenticated but not authorized to access the resource.

Insufficient permissions

404

Not Found

Server cannot find the requested resource.

Missing routes, deleted resources

405

Method Not Allowed

HTTP method is not supported for this endpoint.

Wrong HTTP verb used

408

Request Timeout

Server timed out waiting for the request.

Slow client connections

409

Conflict

Request conflicts with current state of the server.

Duplicate resource creation

410

Gone

Resource was permanently deleted and won't be available again.

Permanently removed resources

413

Payload Too Large

Request entity is larger than limits defined by server.

File upload size limits

415

Unsupported Media Type

Payload format not supported by this endpoint.

Wrong Content-Type header

422

Unprocessable Entity

Request well-formed but unable to be followed due to semantic errors.

Validation failures in REST APIs

429

Too Many Requests

Client has sent too many requests in a given time window.

Rate limiting

500

Internal Server Error

Generic server-side error; something went wrong unexpectedly.

Unhandled exceptions, bugs

501

Not Implemented

Server does not support the functionality required for this request.

Unimplemented features

502

Bad Gateway

Server acting as gateway received an invalid response upstream.

Proxy/load balancer errors

503

Service Unavailable

Server temporarily unable to handle requests.

Maintenance, overload

504

Gateway Timeout

Gateway did not receive a timely response from upstream.

Upstream service timeouts

507

Insufficient Storage

Server unable to store the representation needed to complete the request.

Disk full, quota exceeded

30+ Status Codes

Covers all standard HTTP/1.1 status codes from 1xx to 5xx.

Use-Case Labels

Each code includes common real-world scenarios for quick context.

Instant Search

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