zitadel/site/docs/documentation/03-openidoauth.en.md

---
title: OpenID Connect 1.0 & OAuth 2.0
---

### Endpoints and Domains

This chapter documents the [OpenID Connect 1.0](https://openid.net/connect/) and [OAuth 2.0](https://oauth.net/2/) features provided by **ZITADEL**.

Under normal circumstances **ZITADEL** need four domain names to operate properly.

| Domain Name | Example             | Description                                                                                                                          |
|:------------|:--------------------|--------------------------------------------------------------------------------------------------------------------------------------|
| issuer      | issuer.zitadel.ch   | Provides the [OpenID Connect 1.0 Discovery Endpoint](#openid-connect-10-discovery)                                                   |
| api         | api.zitadel.ch      | All ZITADEL API's are located under this domain see [API explanation](develop#APIs) for details                                      |
| login       | accounts.zitadel.ch | The accounts.* page provides server renderer pages like login and register and as well the authorization_endpoint for OpenID Connect |
| console     | console.zitadel.ch  | With the console.* domain we serve the assets for the management gui                                                                 |

#### OpenID Connect 1.0 Discovery

The OpenID Connect Discovery Endpoint is located with the issuer domain.
For example with [zitadel.ch](https://zitadel.ch) this would be the domain [issuer.zitadel.ch](https://issuer.zitadel.ch). This would give us [https://issuer.zitadel.ch/.well-known/openid-configuration](https://issuer.zitadel.ch/.well-known/openid-configuration).

**Link to spec.** [OpenID Connect Discovery 1.0 incorporating errata set 1](https://openid.net/specs/openid-connect-discovery-1_0.html)

#### authorization_endpoint

[https://accounts.zitadel.ch/oauth/v2/authorize](https://accounts.zitadel.ch/oauth/v2/authorize)

> The authorization_endpoint is located with the login page, due to the need of accessing the same cookie domain

#### token_endpoint

[https://api.zitadel.ch/oauth/v2/token](https://api.zitadel.ch/oauth/v2/token)

#### userinfo_endpoint

[https://api.zitadel.ch/oauth/v2/userinfo](https://api.zitadel.ch/oauth/v2/userinfo)

#### end_session_endpoint

[https://accounts.zitadel.ch/oauth/v2/endsession](https://accounts.zitadel.ch/oauth/v2/endsession)

> The end_session_endpoint is located with the login page, due to the need of accessing the same cookie domain

#### jwks_uri

[https://api.zitadel.ch/oauth/v2/keys](https://api.zitadel.ch/oauth/v2/keys)

> Be aware that these keys can be rotated without any prior notice. We will however make sure that a proper `kid` is set with each key!

#### OAuth 2.0 Metadata

**ZITADEL** does not provide a OAuth 2.0 Metadata endpoint but instead provides a [OpenID Connect Discovery Endpoint](#openid-connect-10-discovery).

### Scopes

#### How scopes work

> TODO describe

#### Reserved Scopes

In addition to the standard compliant scopes we utilize the following scopes.

| Scope                                           | Description                                                                                                                                                     | Example                                    |
|:------------------------------------------------|:----------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------|
| urn:zitadel:iam:org:project:role:{rolename}     | By using this scope a [client](administrate#clients) can request the claim urn:zitadel:iam:roles:rolename} to be asserted when possible. As an alternative approach you can enable all [roles](administrate#Roles) to be asserted from the [project](administrate#projects) a [client](administrate#clients) belongs to. See details [here](administrate#RBAC_Settings)                                                  | urn:zitadel:iam:org:project:role:user      |
| urn:zitadel:iam:org:domain:primary:{domainname} | When requesting this scope **ZITADEL** will enforce that the user is member of the selected organisation. If the organisation does not exist a failure is displayed | urn:zitadel:iam:org:domain:primary:acme.ch |
| urn:zitadel:iam:role:{rolename}                 |                                                                                                                                                                 |                                            |

### Claims

> TODO describe

#### Reserved Claims

| Claims                                          | Description | Example                                                                          |
|:------------------------------------------------|:------------|----------------------------------------------------------------------------------|
| urn:zitadel:iam:org:domain:primary:{domainname} |             | `{"urn:zitadel:iam:org:domain:primary": "acme.ch"}`                              |
| urn:zitadel:iam:org:project:roles:{rolename}    |             | `{"urn:zitadel:iam:org:project:roles": [ {"user": {"id1": "acme.zitade.ch", "id2": "caos.ch"} } ] }` |
| urn:zitadel:iam:roles:{rolename}                |             |                                                                                  |

### Grant Types

For a list of supported or unsupported `Grant Types` please have a look at the table below.

| Grant Type                                            | Supported           |
|:------------------------------------------------------|:--------------------|
| Authorization Code                                    | yes                 |
| Authorization Code with PKCE                          | yes                 |
| Implicit                                              | yes                 |
| Resource Owner Password Credentials                   | no                  |
| Client Credentials                                    | yes                 |
| Device Authorization                                  | under consideration |
| Refresh Token                                         | work in progress    |
| JSON Web Token (JWT) Profile                          | partially           |
| Security Assertion Markup Language (SAML) 2.0 Profile | no                  |
| Token Exchange                                        | work in progress    |

#### Authorization Code

**Link to spec.** [The OAuth 2.0 Authorization Framework Section 1.3.1](https://tools.ietf.org/html/rfc6749#section-1.3.1)

#### Proof Key for Code Exchange

**Link to spec.** [Proof Key for Code Exchange by OAuth Public Clients](https://tools.ietf.org/html/rfc7636)

#### Implicit

**Link to spec.** [The OAuth 2.0 Authorization Framework Section 1.3.2](https://tools.ietf.org/html/rfc6749#section-1.3.2)

#### Client Credentials

**Link to spec.** [The OAuth 2.0 Authorization Framework Section 1.3.4](https://tools.ietf.org/html/rfc6749#section-1.3.4)

#### Refresh Token

**Link to spec.** [The OAuth 2.0 Authorization Framework Section 1.5](https://tools.ietf.org/html/rfc6749#section-1.5)

#### JSON Web Token (JWT) Profile

**Link to spec.** [JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and Authorization Grants](https://tools.ietf.org/html/rfc7523)

#### Token Exchange

**Link to spec.** [OAuth 2.0 Token Exchange](https://tools.ietf.org/html/rfc8693)

### Device Authorization

**Link to spec.** [OAuth 2.0 Device Authorization Grant](https://tools.ietf.org/html/rfc8628)

### Not Supported Grant Types

#### Resource Owner Password Credentials

> Due to growing security concern we do not support this grant type. With OAuth 2.1 it looks like this grant will be removed.

**Link to spec.** [OThe OAuth 2.0 Authorization Framework Section 1.3.3](https://tools.ietf.org/html/rfc6749#section-1.3.3)

#### Security Assertion Markup Language (SAML) 2.0 Profile

**Link to spec.** [Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants](https://tools.ietf.org/html/rfc7522)