# Signing-in

To sign-up or login to Proto, go to [v3.proto.cx](https://v3.proto.cx)

***

## Secure sign-in methods

Proto uses passwordless user authentication for heightened security. Sign-in to Proto with:

* **Email** — sends a magic link to your email inbox, which must be followed to complete login and navigate into Proto.
* **Google** — the SSO (single sign-on) method for Google-associated email addresses.
* **Microsoft** — the SSO method method for Outlook-associated email address.

{% hint style="warning" %}
Sign-up requires a valid email domain. Domains associated with spam are ineligible for Proto AICX login.
{% endhint %}

***

## Workspace association

All user accounts are associated with at least one [workspace](https://documentation.proto.cx/docs/settings/workspace).

If you're signing up by yourself (rather than following an email invitation to an existing workspace), you will be automatically placed in your own default workspace.