diff --git a/pbs-api-types/src/lib.rs b/pbs-api-types/src/lib.rs
index 01c14cc4..4247bba3 100644
--- a/pbs-api-types/src/lib.rs
+++ b/pbs-api-types/src/lib.rs
@@ -68,6 +68,9 @@ pub use crypto::{CryptMode, Fingerprint, bytes_as_fingerprint};
 
 pub mod file_restore;
 
+mod openid;
+pub use openid::*;
+
 mod remote;
 pub use remote::*;
 
diff --git a/pbs-api-types/src/openid.rs b/pbs-api-types/src/openid.rs
new file mode 100644
index 00000000..65967bd1
--- /dev/null
+++ b/pbs-api-types/src/openid.rs
@@ -0,0 +1,121 @@
+use serde::{Deserialize, Serialize};
+
+use proxmox_schema::{
+    api, ApiStringFormat, ArraySchema, Schema, StringSchema, Updater,
+};
+
+use super::{
+    PROXMOX_SAFE_ID_REGEX, PROXMOX_SAFE_ID_FORMAT, REALM_ID_SCHEMA,
+    SINGLE_LINE_COMMENT_SCHEMA,
+};
+
+pub const OPENID_SCOPE_FORMAT: ApiStringFormat =
+    ApiStringFormat::Pattern(&PROXMOX_SAFE_ID_REGEX);
+
+pub const OPENID_SCOPE_SCHEMA: Schema = StringSchema::new("OpenID Scope Name.")
+    .format(&OPENID_SCOPE_FORMAT)
+    .schema();
+
+pub const OPENID_SCOPE_ARRAY_SCHEMA: Schema = ArraySchema::new(
+    "Array of OpenId Scopes.", &OPENID_SCOPE_SCHEMA).schema();
+
+pub const OPENID_SCOPE_LIST_FORMAT: ApiStringFormat =
+    ApiStringFormat::PropertyString(&OPENID_SCOPE_ARRAY_SCHEMA);
+
+pub const OPENID_DEFAILT_SCOPE_LIST: &'static str = "email profile";
+pub const OPENID_SCOPE_LIST_SCHEMA: Schema = StringSchema::new("OpenID Scope List")
+    .format(&OPENID_SCOPE_LIST_FORMAT)
+    .default(OPENID_DEFAILT_SCOPE_LIST)
+    .schema();
+
+pub const OPENID_ACR_FORMAT: ApiStringFormat =
+    ApiStringFormat::Pattern(&PROXMOX_SAFE_ID_REGEX);
+
+pub const OPENID_ACR_SCHEMA: Schema = StringSchema::new("OpenID Authentication Context Class Reference.")
+    .format(&OPENID_SCOPE_FORMAT)
+    .schema();
+
+pub const OPENID_ACR_ARRAY_SCHEMA: Schema = ArraySchema::new(
+    "Array of OpenId ACRs.", &OPENID_ACR_SCHEMA).schema();
+
+pub const OPENID_ACR_LIST_FORMAT: ApiStringFormat =
+    ApiStringFormat::PropertyString(&OPENID_ACR_ARRAY_SCHEMA);
+
+pub const OPENID_ACR_LIST_SCHEMA: Schema = StringSchema::new("OpenID ACR List")
+    .format(&OPENID_ACR_LIST_FORMAT)
+    .schema();
+
+pub const OPENID_USERNAME_CLAIM_SCHEMA: Schema = StringSchema::new(
+    "Use the value of this attribute/claim as unique user name. It \
+    is up to the identity provider to guarantee the uniqueness. The \
+    OpenID specification only guarantees that Subject ('sub') is \
+    unique. Also make sure that the user is not allowed to change that \
+    attribute by himself!")
+    .max_length(64)
+    .min_length(1)
+    .format(&PROXMOX_SAFE_ID_FORMAT) .schema();
+
+#[api(
+    properties: {
+        realm: {
+            schema: REALM_ID_SCHEMA,
+        },
+        "client-key": {
+            optional: true,
+        },
+        "scopes": {
+            schema: OPENID_SCOPE_LIST_SCHEMA,
+            optional: true,
+        },
+        "acr-values": {
+            schema: OPENID_ACR_LIST_SCHEMA,
+            optional: true,
+        },
+        prompt: {
+            description: "OpenID Prompt",
+            type: String,
+            format: &PROXMOX_SAFE_ID_FORMAT,
+            optional: true,
+        },
+        comment: {
+            optional: true,
+            schema: SINGLE_LINE_COMMENT_SCHEMA,
+        },
+        autocreate: {
+            optional: true,
+            default: false,
+        },
+        "username-claim": {
+            schema: OPENID_USERNAME_CLAIM_SCHEMA,
+            optional: true,
+        },
+    },
+)]
+#[derive(Serialize, Deserialize, Updater)]
+#[serde(rename_all="kebab-case")]
+/// OpenID configuration properties.
+pub struct OpenIdRealmConfig {
+    #[updater(skip)]
+    pub realm: String,
+    /// OpenID Issuer Url
+    pub issuer_url: String,
+    /// OpenID Client ID
+    pub client_id: String,
+    #[serde(skip_serializing_if="Option::is_none")]
+    pub scopes: Option<String>,
+    #[serde(skip_serializing_if="Option::is_none")]
+    pub acr_values: Option<String>,
+    #[serde(skip_serializing_if="Option::is_none")]
+    pub prompt: Option<String>,
+    /// OpenID Client Key
+    #[serde(skip_serializing_if="Option::is_none")]
+    pub client_key: Option<String>,
+    #[serde(skip_serializing_if="Option::is_none")]
+    pub comment: Option<String>,
+    /// Automatically create users if they do not exist.
+    #[serde(skip_serializing_if="Option::is_none")]
+    pub autocreate: Option<bool>,
+    #[updater(skip)]
+    #[serde(skip_serializing_if="Option::is_none")]
+    pub username_claim: Option<String>,
+}