# Errors WorkOS uses standard HTTP response codes to indicate the success or failure of your API requests. 200 : Successful request. 400 : The request was not acceptable. Check that the parameters were correct. 401 : The API key used was invalid. 403 : The API key used did not have the correct permissions. 404 : The resource was not found. 422 : Validation failed for the request. Check that the parameters were correct. 429 : Too many requests. Refer to the [Rate Limits](https://workos.com/docs/reference/rate-limits) section. 5xx : Indicates an error with WorkOS servers.