# Signing-in

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

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## 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 %}

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## Workspace association

All user accounts are associated with at least one [workspace](/docs/settings/workspace.md).

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.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://documentation.proto.cx/docs/getting-started/signing-in.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.