# REST API error codes Source: [https://docs.qualcomm.com/doc/80-63441-4/topic/LaaS-REST-API-error-codes.html](https://docs.qualcomm.com/doc/80-63441-4/topic/LaaS-REST-API-error-codes.html) In the event where an error occurs while processing a LaaS API call, Qualcomm Aware Cloud returns one of the following error codes in the HTTP response header. | Error code | Description | | --- | --- | | 400 | Invalid Request | | 401 | Invalid Credentials | | 403 | Forbidden Error | | 429 | API Rate Limit Reached | | 500 | Back-end Server Error | | 502 | Bad Gateway | | 503 | Service Unavailable | **Parent Topic:** [LaaS REST API](https://docs.qualcomm.com/doc/80-63441-4/topic/LaaS-REST-API.html) Last Published: Jul 16, 2025 [Previous Topic Configuration service endpoint](https://docs.qualcomm.com/bundle/publicresource/80-63441-4/topics/LaaS-config-service.md) [Next Topic LaaS end-to-end call flows](https://docs.qualcomm.com/bundle/publicresource/80-63441-4/topics/LaaS-end-to-end-call-flows.md)