Gateway response types for API Gateway

API Gateway exposes the following gateway responses for customization by API developers.

Gateway response type	Default status code	Description
ACCESS_DENIED	403	The gateway response for authorization failure—for example, when access is denied by a custom or Amazon Cognito authorizer. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
API_CONFIGURATION_ERROR	500	The gateway response for an invalid API configuration—including when an invalid endpoint address is submitted, when base64 decoding fails on binary data when binary support is enacted, or when integration response mapping can't match any template and no default template is configured. If the response type is unspecified, this response defaults to the DEFAULT_5XX type.
AUTHORIZER_CONFIGURATION_ERROR	500	The gateway response for failing to connect to a custom or Amazon Cognito authorizer. If the response type is unspecified, this response defaults to the DEFAULT_5XX type.
AUTHORIZER_FAILURE	500	The gateway response when a custom or Amazon Cognito authorizer failed to authenticate the caller. If the response type is unspecified, this response defaults to the DEFAULT_5XX type.
BAD_REQUEST_PARAMETERS	400	The gateway response when the request parameter cannot be validated according to an enabled request validator. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
BAD_REQUEST_BODY	400	The gateway response when the request body cannot be validated according to an enabled request validator. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
DEFAULT_4XX	Null	The default gateway response for an unspecified response type with the status code of 4XX. Changing the status code of this fallback gateway response changes the status codes of all other 4XX responses to the new value. Resetting this status code to null reverts the status codes of all other 4XX responses to their original values. Note AWS WAF custom responses take precedence over custom gateway responses.
DEFAULT_5XX	Null	The default gateway response for an unspecified response type with a status code of 5XX. Changing the status code of this fallback gateway response changes the status codes of all other 5XX responses to the new value. Resetting this status code to null reverts the status codes of all other 5XX responses to their original values.
EXPIRED_TOKEN	403	The gateway response for an AWS authentication token expired error. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
INTEGRATION_FAILURE	504	The gateway response for an integration failed error. If the response type is unspecified, this response defaults to the DEFAULT_5XX type.
INTEGRATION_TIMEOUT	504	The gateway response for an integration timed out error. If the response type is unspecified, this response defaults to the DEFAULT_5XX type.
INVALID_API_KEY	403	The gateway response for an invalid API key submitted for a method requiring an API key. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
INVALID_SIGNATURE	403	The gateway response for an invalid AWS signature error. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
MISSING_AUTHENTICATION_TOKEN	403	The gateway response for a missing authentication token error, including the cases when the client attempts to invoke an unsupported API method or resource. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
QUOTA_EXCEEDED	429	The gateway response for the usage plan quota exceeded error. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
REQUEST_TOO_LARGE	413	The gateway response for the request too large error. If the response type is unspecified, this response defaults to: HTTP content length exceeded 10485760 bytes.
RESOURCE_NOT_FOUND	404	The gateway response when API Gateway cannot find the specified resource after an API request passes authentication and authorization, except for API key authentication and authorization. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
THROTTLED	429	The gateway response when usage plan-, method-, stage-, or account-level throttling limits exceeded. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
UNAUTHORIZED	401	The gateway response when the custom or Amazon Cognito authorizer failed to authenticate the caller.
UNSUPPORTED_MEDIA_TYPE	415	The gateway response when a payload is of an unsupported media type, if strict passthrough behavior is enabled. If the response type is unspecified, this response defaults to the DEFAULT_4XX type.
WAF_FILTERED	403	The gateway response when a request is blocked by AWS WAF. If the response type is unspecified, this response defaults to the DEFAULT_4XX type. Note AWS WAF custom responses take precedence over custom gateway responses.