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.
62 error codes available
100 error codes available
63 error codes available
22 error codes available
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AWS RequestLimitExceeded means an AWS API request-rate or account-level request quota was exceeded for the target service, operation, region, or account context...
AWS InsufficientCapacityException means the service currently lacks enough backend capacity to satisfy the request. In services such as AWS Network Firewall, th...
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 AWS received a signed request outside the allowed SigV4 time window, after a presigned URL already expired, or with a...
Amazon S3 RequestTimeTooSkewed means the caller clock is too far from S3 server time for the signed request to be accepted. This usually points to clock skew ra...
AWS ServiceUnavailable (Service Unavailable) means Amazon S3 is temporarily unable to handle the request. In Amazon S3, this error returns HTTP 503.
Amazon S3 SlowDown means S3 is applying back-pressure because request rate or request concentration is temporarily exceeding what one hot path can absorb.
AWS ValidationException (Validation Exception) means the input fails service validation constraints. In AWS APIs, this error returns HTTP 400.
Amazon S3 BucketAlreadyOwnedByYou means a CreateBucket request targeted a bucket name that already exists and is owned by the same AWS account.
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 access key ID or client token identifier in the request does not map to an active credential in the...
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...