HTTP Status Codes

Continue

Continue. The client should keep sending the request body.

Switching Protocols

Switching Protocols. The server agrees to switch protocols as requested by Upgrade.

Processing

Processing. The request was received and is being handled, no result yet.

Early Hints

Early Hints. Sends headers before the final response so clients can preload.

OK

OK. The request succeeded and the body carries the result.

Created

Created. A new resource was created; its URL is usually in the Location header.

Accepted

Accepted. The request is queued for processing and is not finished yet.

Non-Authoritative Information

Non-Authoritative Information. Metadata came from a cached copy, not the origin.

No Content

No Content. Succeeded with no body, typical for DELETE and PUT.

Reset Content

Reset Content. Asks the client to reset the document view, such as clearing a form.

Partial Content

Partial Content. A byte range of the resource, used for resumable downloads.

Multi-Status

Multi-Status. WebDAV response carrying several sub-request statuses.

Already Reported

Already Reported. WebDAV hint that a resource was listed in an earlier response.

IM Used

IM Used. The server applied delta updates to the resource.

Multiple Choices

Multiple Choices. The resource has several representations to pick from.

Moved Permanently

Moved Permanently. The resource moved for good; caches and indexes should update.

Found

Found. Temporary redirect for this request; keep using the original URL.

See Other

See Other. Fetch the result at Location with GET.

Not Modified

Not Modified. The cached copy is still valid, so no body is sent.

Use Proxy

Use Proxy. Access must go through the given proxy (deprecated).

Temporary Redirect

Temporary Redirect. Like 302 but the request method must not change.

Permanent Redirect

Permanent Redirect. Like 301 but the request method must not change.

Bad Request

Bad Request. Malformed syntax or invalid parameters.

Unauthorized

Unauthorized. Credentials are missing or invalid; authenticate first.

Payment Required

Payment Required. Reserved; some APIs use it for exhausted quota.

Forbidden

Forbidden. The identity is known but not allowed.

Not Found

Not Found. The resource does not exist, or is hidden on purpose.

Method Not Allowed

Method Not Allowed. The resource exists but not for this HTTP method.

Not Acceptable

Not Acceptable. The server cannot produce anything matching the Accept header.

Proxy Authentication Required

Proxy Authentication Required. Authenticate with the proxy first.

Request Timeout

Request Timeout. The client did not finish sending in time.

Conflict

Conflict. The request clashes with the resource's current state.

Gone

Gone. The resource existed but is permanently unavailable.

Length Required

Length Required. The request is missing Content-Length.

Precondition Failed

Precondition Failed. A condition such as If-Match did not hold.

Content Too Large

Content Too Large. The request body exceeds the server limit.

URI Too Long

URI Too Long. The URL is longer than the server accepts.

Unsupported Media Type

Unsupported Media Type. The request Content-Type is not accepted.

Range Not Satisfiable

Range Not Satisfiable. The requested byte range is outside the resource.

Expectation Failed

Expectation Failed. The Expect header cannot be met.

I'm a Teapot

I'm a Teapot. An April Fools' code, widely used as an easter egg.

Misdirected Request

Misdirected Request. This connection cannot serve that host.

Unprocessable Content

Unprocessable Content. Syntax is fine but the semantics are wrong; common for form validation.

Locked

Locked. The target resource is locked (WebDAV).

Failed Dependency

Failed Dependency. This request failed because a previous one did.

Too Early

Too Early. The server declines to process a request that might be replayed.

Upgrade Required

Upgrade Required. The client should switch to a newer protocol.

Precondition Required

Precondition Required. The server wants If-Match and friends to avoid lost updates.

Too Many Requests

Too Many Requests. Rate limited; retry later.

Request Header Fields Too Large

Request Header Fields Too Large. Header size exceeds the limit.

Unavailable For Legal Reasons

Unavailable For Legal Reasons. Blocked for legal or censorship reasons.

Enhance Your CalmNon-standard

Enhance Your Calm. Twitter's old rate-limit code; not standard.

No ResponseNon-standard

No Response. nginx closes the connection without replying.

Retry WithNon-standard

Retry With. Microsoft's hint to retry with more information.

Client Closed RequestNon-standard

Client Closed Request. Logged by nginx when the client hangs up first.

Internal Server Error

Internal Server Error. The server threw; check its logs.

Not Implemented

Not Implemented. The server does not support this method.

Bad Gateway

Bad Gateway. A gateway got an invalid response from upstream.

Service Unavailable

Service Unavailable. Overloaded or in maintenance; often includes Retry-After.

Gateway Timeout

Gateway Timeout. The upstream did not respond in time.

HTTP Version Not Supported

HTTP Version Not Supported.

Variant Also Negotiates

Variant Also Negotiates. The content negotiation config loops.

Insufficient Storage

Insufficient Storage. WebDAV cannot store the representation.

Loop Detected

Loop Detected. WebDAV hit an infinite loop.

Not Extended

Not Extended. Further extensions to the request are required.

Network Authentication Required

Network Authentication Required. Typical of a public WiFi captive portal.

Bandwidth Limit ExceededNon-standard

Bandwidth Limit Exceeded. cPanel hosts use this when the monthly quota is gone.

Unknown ErrorNon-standard

Unknown Error. Cloudflare got an empty or malformed response from the origin.

Web Server Is DownNon-standard

Web Server Is Down. Cloudflare cannot connect to the origin.

Connection Timed OutNon-standard

Connection Timed Out. The TCP handshake with the origin timed out.

Origin Is UnreachableNon-standard

Origin Is Unreachable. Usually a DNS or routing problem.

A Timeout OccurredNon-standard

A Timeout Occurred. Connected, but the origin did not answer within 100 seconds.

SSL Handshake FailedNon-standard

SSL Handshake Failed. The TLS negotiation with the origin failed.

Invalid SSL CertificateNon-standard

Invalid SSL Certificate. The origin certificate is expired, mismatched or untrusted.

Railgun ErrorNon-standard

Railgun Error. The Railgun connection broke (deprecated).

Site is FrozenNon-standard

Site is Frozen. Pantheon uses this for a suspended site.

Network Read TimeoutNon-standard

Network Read Timeout. A proxy timed out reading upstream; not standard.

Network Connect TimeoutNon-standard

Network Connect Timeout. A proxy timed out connecting upstream; not standard.