Make the passkey endpoints well-known URL part of your passkey implementation

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Posted by Amy Zeppenfeld – Developer Relations Engineer

Passkeys are leading the charge towards a more secure future without passwords. Passkeys are a new type of cryptographic credential that leverages FIDO2 and WebAuthn to provide an authentication mechanism that is phishing-resistant, user friendly, simple to implement, and more secure than password-based authentication. Most major operating systems and browsers now feature full passkey support. Passkeys are expected to replace passwords as the predominant authentication mechanism in the not-too-distant future, and developers are advised to begin implementing passkey-enabled authentication solutions today.

As you implement passkeys in your app or web service, take a moment to implement a passkey endpoints well-known URL.

This is a standardized way to advertise your support for passkeys and optimize user experience. This well-known URL will allow third party services like password managers, passkey providers, and other security tools to direct users to enroll and manage their passkeys for any site that supports them. You can use app-links or deep linking with the passkey-endpoints well-known URL to allow these pages to open directly in your app.

Password management tool usage has been steadily rising, and we expect most providers will integrate passkey management as well. You can allow third party tools and services to direct your users to your dedicated passkey management page by implementing the passkey-endpoints well-known URL.

The best part is that in most cases you can implement this feature in two hours or less! All you need to do is host a simple schema on your site. Check out the example below:

  1. For a web service at https://example.com, the well-known URLwould be https://example.com/.well-known/passkey-endpoints
  2. When the URL is queried, the response should use the following schema:
{
"enroll": "https://example.com/account/manage/passkeys/create",
"manage": "https://example.com/account/manage/passkeys"
}

Note: You can decide the exact value of the URLs for both enroll and manage based on your website’s own configuration.

If you have a mobile app, we strongly recommend utilizing deep linking to have these URLs open the corresponding screen for each activity directly in your app to “enroll” or “manage” passkeys. This will keep your users focused and on track to enroll into passkeys.

And that’s it!

Further details and examples can be found in the passkey endpoints well-known URL explainer.


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