---
title: HTTP status codes
description: When working with a Advanced Identity Cloud REST API, client applications should expect at least the following HTTP status codes. Not all services necessarily return all status codes identified here:
component: pingoneaic
page_id: pingoneaic:developer-docs:crest/status-codes
canonical_url: https://docs.pingidentity.com/pingoneaic/developer-docs/crest/status-codes.html
---

# HTTP status codes

When working with a Advanced Identity Cloud REST API, client applications should expect at least the following HTTP status codes. Not all services necessarily return all status codes identified here:

* 200 OK

  The request succeeded and a resource returned, depending on the request.

* 201 Created

  The request succeeded and the resource was created.

* 204 No Content

  The action request succeeded, and there was no content to return.

* 304 Not Modified

  The read request included an `If-None-Match` header, and the value of the header matched the revision value of the resource.

* 400 Bad Request

  The request was malformed.

* 401 Unauthorized

  The request requires user authentication.

* 403 Forbidden

  Access was forbidden during an operation on a resource.

* 404 Not Found

  The specified resource could not be found, perhaps because it does not exist.

* 405 Method Not Allowed

  The HTTP method is not allowed for the requested resource.

* 406 Not Acceptable

  The request contains parameters that are not acceptable, such as a resource or protocol version that is not available.

* 409 Conflict

  The request would have resulted in a conflict with the current state of the resource.

* 410 Gone

  The requested resource is no longer available, and will not become available again. This can happen when resources expire.

* 412 Precondition Failed

  The resource's current version does not match the version provided.

* 415 Unsupported Media Type

  The request is in a format not supported by the requested resource for the requested method.

* 428 Precondition Required

  The resource requires a version, but no version was supplied in the request.

* 500 Internal Server Error

  The service encountered an unexpected condition that prevented it from fulfilling the request.

* 501 Not Implemented

  The resource does not support the functionality required to fulfill the request.

* 503 Service Unavailable

  The requested resource was temporarily unavailable. The service may be disabled, for example.