# Step up

## Issue a one-time password that can be used to step-up a token

 - [POST /v1/stepup/challenges/otp/{channel}](https://api.weavr.io/products/payment-run/openapi/step-up/stepupscachallenge.md): Initiates the step-up token process by sending an SMS with an one-time-password to a device belonging to the logged-in user that was previously enrolled through /authentication_factors/otp/{channel} endpoint.

This process is required for endpoints that require a step-up token to complete the call.

_Note that on the Sandbox Environment, text messages are not sent and the one-time-password is always \"123456\"._

## Verify a step-up token using a one-time password

 - [POST /v1/stepup/challenges/otp/{channel}/verify](https://api.weavr.io/products/payment-run/openapi/step-up/stepupscaverify.md): Completes the verification process for a step up token.

_Note that on the Sandbox Environment, text messages are not sent and the verificationCode is always \"123456\"._