# One Time Token

One-time tokens are temporary authentication sessions used to track SCA challenges. When an SCA-protected endpoint is called, a one-time token is returned containing the challenges that must be completed.
Please read the [SCA over API guide](/guides/developer/auth-and-security/sca-over-api) to understand how SCA integration works.

 - [One-Time Token](https://docs.wise.com/api-reference/preview/sca-ott/one-time-token.md): Schema: #/components/schemas/one-time-token
 - [GET /one-time-token/status](https://docs.wise.com/api-reference/preview/sca-ott/ottstatusget.md): Retrieve necessary information to clear a OTT.