# Identity

> Identity is the sign-in service that issues the tokens every API, the OpenStack CLI and the OpenStack SDKs use.

Identity is where you sign in. It checks who you are and gives you a token, which
every other service accepts, so you never sign in to a service separately. Identity also lists
where each service is, in the service catalog.


Identity is OpenStack Keystone, so any tool that works with OpenStack can sign in with it at
`https://auth.vexxhost.net/v3`.


## Concepts

<Cards>
  <Card title="Authentication" href="/identity/authentication" description="How tokens prove who you are, what they are valid for, and when they expire." />

  <Card title="Projects" href="/identity/projects" description="How a token's project decides which resources you see and change." />

  <Card title="Service catalog" href="/identity/service-catalog" description="How tools find each service's endpoint in every region." />
</Cards>

## Guides

<Cards>
  <Card title="Get a token" href="/identity/get-a-token" description="Get a token with the CLI or the Identity API and send it with a request." />

  <Card title="Create an application credential" href="/identity/application-credentials" description="Give scripts and tools their own credential instead of your password." />
</Cards>