Clerk MFA

Clerk’s Multi Factor Authentication or OTP app supports both Virtual and Non-VoIP phone numbers for SMS verification from all major online platforms.

Clerk’s Two Factor Authentication (or Multi-Factor) Authentication (MFA) app allows you to receive verification codes from any online service. Clerk supports both virtual and non-voip phone numbers. Use clerk on any website and speed up login with your partners and employees by receiving one time passwords and verification codes.

Features:

  • Online SMS Verification

  • Shared Multi-factor Authentication

  • Use Numbers on Any Website

  • Create Unlimited Numbers

  • Receive Verification Codes in Seconds in:

    • Slack

    • Email

    • Webhook

    • Phone number

Virtual Phone Numbers

A VoIP number, also known as Voice over IP number, is a virtual phone number that works with most of online services to receive one time passwords (OTP), but not all. A number of services can work with a virtual phone number via voice transcription.

Note: By default when you provision a Clerk phone number in Slack you get assigned a virtual phone number.

Non VOIP (Real) Phone Numbers

Non-VoIP or Real phone numbers are usually required by highly sensitive websites such as banks, Facebook, Linkedin... This type of phone number will work with ALL online services.

All Clerk Non VoIP numbers are USA based real phone numbers that will work with ALL online services.

To enable a non-voip number on your account please reach out to [email protected]

Services

Refer to the following table for a breakdown of some of the popular supported services.

Service

Non VOIP

Virtual

ALL

Amazon

Apple

✓*

Bill.com

Brex

Convoy

Chase

Craigslist

Facebook

GoDaddy

Google

✓*

Gusto

Hubspot

Instagram

John Hancock

Justworks

LinkedIn

Paypal

SendGrid

Shopify

Spectrum

Stripe

Tinder

Twilio

✓*

Twitter

Uber

Wise

✓*: The following services will work with our virtual phone number via voice call transcription.