Cross Accounts
One sign-in for every Cross product, and how apps verify it.
Cross Accounts is the identity service behind every Cross product. You sign in once, with your Cross account or Google, and each product trusts that sign-in. Apps check it with standard signed tokens and published keys, so no product ever sees your password.
More is on the way
Coming next: integration guides for web apps, desktop apps and command-line tools, and the API reference.