Getting started

Get to know Transmit Security by quickly setting up a passwordless authentication flow using secured, WebAuthn-based biometrics. The experience is fully hosted and seamless—no usernames or passwords, only their device.

Step 1: Add authentication route

Upon successful authentication, Transmit Security redirects to your authentication endpoint. This should be an endpoint in your backend server that accepts a code query parameter. It will be used to complete the login flow by exchanging the code it receives for the user identity. For example, if is your redirect URI, we'll redirect to

Step 2: Create your app

To integrate with Transmit Security, you'll need to create an application from the Admin Portal. It will configure some basic settings used for authentication. If you don't already have a tenant, contact us and we'll set you up for free.

  1. From Applications , click Add application .
  2. Add the friendly application name to display in the Admin Portal.
  3. Add a logo and client display name to display on the login screens.
  4. Add the authentication route configured in Step 1 as an allowed redirect URI.

Application ID, Client ID, and Client Secret are automatically generated. You'll need the client credentials to obtain access tokens used to authorize Transmit API requests.

Step 3: Customize experience

No setup is required to start using WebAuthn for secure biometric authentication. But if you want to customize the authentication experience, you can do this from the Authentication page by selecting WebAuthn > Hosted tab.

Step 4: Initiate login

Send the /auth/webauthn request below to initiate a login flow. Since create_new_user is enabled, a new user will be created if the user isn't already registered. This allows frictionless onboarding of new users, such as when signing up users to a retail app. The redirect_uri should correspond to the one added in step 2, and the client_id can be found in the Transmit Admin Portal in your application settings. Upon successful authentication, a code will be returned to the route you created in step 1.

curl --request GET \
     --url '
     create_new_user=true' \
     --header 'Accept: application/json'

Step 5: Authenticate user

To complete the login flow, your server backend should now send the /token request below, which passes the code you received in step 4 and your client credentials. This will return user tokens that identify the user and their authorization.

curl --request POST \
     --url \
     --header 'Accept: application/json' \
     --header 'Content-Type: application/json' \
     --data '
     "code": "123abc",
     "client_id": "your-client",
     "client_secret": "your-secret"

What's next?

Now that you've authenticated your users with a WebAuthn Hosted authentication, you can view and manage their profiles using our User Management API or from the Users page of your Admin Portal.

Learn more about our authentication, identity management and account protection capabilities.