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Dionis
Dionis

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HTTP codes cheatsheet

What are HTTP status codes

An HTTP status code is a server response to a browser's request. When you visit a website, your browser sends a request to the site's server, and the server then responds to the browser's request with a three-digit code: the HTTP status code.


🔵 HTTP Status Codes

100 - Continue — this status did the notification code that the server has received the first request and waits to receive further instructions from the browser.

101 - Switching Protocols — it is used when the server receives the changes proposed by the browser. For example, changes from HTTP 1.0 to HTTP 1.1.

102 - Processing — the server has received the request but has not completed it. This is to prevent the browser from interpreting that the request has been lost, but not yet completed.

103 - Checkpoint — It is used to proceed with the request that was previously missing or cancelled.


🟢 HTTP Successful Codes

200 - OK

201 - Created

202 - Accepted

204 - No Content — server precessed the request successfully, but there is nothing to return


🟡 HTTP Redirection Codes

301 - Moved Permanently

302 - Moved Temporarily

304 - Not Modified

307 - Moved Temporarily (preserves HTTP method)

308 - Moved Permanently (preserves HTTP method)


🔴 HTTP Client Error Codes :

400 - Bad Request — the request was not understood, malformed request syntax, etc.

💡 Check your request for a missing required parameter or an invalid query parameter value.

401 - Unauthorised — when authentication is required, but was not provided.

💡 The provided API key is invalid or missing.

403 - Forbidden — server is refusing action based on user not having necessary permissions for the resource.

💡 The provided API key is invalid for the requested project.

404 - Not Found — but may be available in the future (e.g. not existing user on specific ID).

💡 The requested resource does not exist

405 - Method Not Allowed — for example, when you do a POST request to a GET-only endpoint.

💡 The requested HTTP method is not supported for the specified resource.

406 - Not Acceptable — generated data are in e different format than accepted by the client.

408 - Request Timeout

409 - Conflict — edit conflict between multiple simultaneous updates.

410 - Gone — similar to 404, but indicates that the resource won’t ever be available again.

411 - Length Required — request did not specify length of content.

413 - Payload Too Large — the request is larger than the server is willing to process.

414 - URI Too Long — typically when too many data are transferred via GET params.

415 - Unsupported Media Type — request contains data in wrong format.

429 - Too Many Requests

💡 The rate limit for the API has been exceeded.


🟣 HTTP Server Error Codes

500 - To Many Requests

💡 The rate limit for the API has been exceeded.

501 - Not Implemented

502 - Bad Gateway — server acts as a proxy and received invalid response from the upstream server.

503 - Service Unavailable — the server cannot temporarily process the request.

504 - Gateway Timeout — server acts as a proxy and did not receive a response from the upstream server in defined time frame.

505 - HTTP Version Not Supported

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