Use this consolidated error code index to navigate HTTP, AWS, Azure, and GCP failures from a single technical library. Each entry links to source-backed diagnosis, root-cause patterns, and production-focused remediation steps. Start broad, then drill into provider pages, operational categories, compare guides, or incident playbooks.
48 error codes available
81 error codes available
43 error codes available
20 error codes available
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AWS InvalidUserID.Malformed means owner or executableBy identifiers in EC2 describe requests are invalid. In Amazon EC2, this error returns HTTP 400.
AWS MalformedQueryString means a Query API request string is syntactically invalid (for example malformed encoding or missing required query structure). In AWS...
AWS RequestExpired (Request Expired) means the request reached AWS outside the allowed signature time window. In AWS APIs, this error returns HTTP 400.
AWS ServiceUnavailable (Service Unavailable) means Amazon S3 is temporarily unable to handle the request. In Amazon S3, this error returns HTTP 503.
AWS ValidationException (Validation Exception) means the input fails service validation constraints. In AWS APIs, this error returns HTTP 400.
AWS BucketAlreadyOwnedByYou (Bucket Already Owned By You) means the bucket already exists and is owned by your AWS account. In Amazon S3, this error returns HTT...
AWS InvalidBucketName (Invalid Bucket Name) means the specified bucket name is invalid for Amazon S3 naming rules. In Amazon S3, this error returns HTTP 400.
AWS NoSuchEntity (No Such Entity) is an IAM-specific error meaning the referenced IAM entity (user, role, group, or policy path target) does not exist. In IAM A...
AWS InvalidClientTokenId (Invalid Client Token Id) means the AWS access key ID or client token does not exist in records. In AWS APIs, this error returns HTTP 4...
AWS MissingParameter (Missing Parameter) means a required parameter for the action is not supplied. In AWS APIs, this error returns HTTP 400.
AWS ServiceQuotaExceededException means the request exceeds a configured service quota for the account/region. Depending on service, this can surface as HTTP 40...
AWS Unavailable (Unavailable) means the service is temporarily unavailable. In AWS APIs, this error returns HTTP 503.
AWS InvalidAction (Invalid Action) means the action or operation requested is invalid. In AWS APIs, this error returns HTTP 400.
AWS InvalidRequest (Invalid Request) means the request is not valid for the selected S3 operation, endpoint mode, or signature configuration. In Amazon S3, this...
AWS OptInRequired (Opt In Required) means the account or access key is not subscribed/opted in to the target AWS service. AWS common errors define it as "the AW...