# Errors

To communicated the success or failure of API requests to clients, TNG Identity SSO uses standard HTTP codes and redirects with error information in responses. Codes `2xx` indicate a success, `3xx` is a redirection with either success of failure response, `4xx` indicates a client error and `5xx` an Identity SSO server error.

Errors that can be handled programatically contain an error response body or in case of indirection, the error attributes are encoded in the redirection URI in the `application/x-www-form-urlencoded` format.

An example of a redirect response uri: \`[https://{redirect-url}?client\_id=d8ffc41f-61ef-47d6-8661-e1374e82a563\&state=MCatotF2bqYhi56JjBR0\&error=server\_error\&error\_description=server+error](https://identity.psp.test.nchpsp.app/products/web/2fa94b46155c30ca/portal/sso/demo?client_id=d8ffc41f-61ef-47d6-8661-e1374e82a563\&state=MCatotF2bqYhi56JjBR0\&error=server_error\&error_description=server+error)\`

#### Attributes

***

**code** `string`

For some scenarios that can be handled programatically a short error code indicating the [Error Code](/tng-identity-documentation/tng-identity-sso/sso-api/errors/error-codes.md) is returned

***

**error\_description** `string`

In some cases an additional human readable description is returned


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