# Step-up Challenges

Issue and verify step-up challenges that elevate an existing user token.

 - [POST /stepup/challenges/otp/{channel}](https://api.weavr.io/products/multi/openapi/step-up-challenges/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}`
 - [POST /stepup/challenges/otp/{channel}/verify](https://api.weavr.io/products/multi/openapi/step-up-challenges/stepupscaverify.md): Completes the verification process for a step up token. The challenge expires after 5 minutes and the number of incorrect OTP attempts is limited to reduce the risk of fraud, in that case challenge ha
 - [POST /stepup/challenges/push/{channel}](https://api.weavr.io/products/multi/openapi/step-up-challenges/stepupscachallengepush.md): Initiates the step-up token process by submitting a push notification to a device belonging to the logged-in user that was previously enrolled through the `/authentication_factors/push/{channel}` endp