diff --git a/src/api2/access/domain.rs b/src/api2/access/domain.rs
index 126cd8ff..c850603a 100644
--- a/src/api2/access/domain.rs
+++ b/src/api2/access/domain.rs
@@ -8,6 +8,7 @@ use serde_json::{json, Value};
 use proxmox::api::{api, Permission, Router, RpcEnvironment};
 
 use crate::api2::types::*;
+use crate::config::domains::{OpenIdRealmConfig, OpenIdUserAttribute};
 
 #[api]
 #[derive(Deserialize, Serialize, PartialEq, Eq)]
@@ -50,6 +51,70 @@ pub struct BasicRealmInfo {
     pub comment: Option<String>,
 }
 
+#[api(
+    properties: {
+        "issuer-url": {
+            description: "OpenID Issuer Url",
+            type: String,
+            optional: true,
+        },
+        "client-id": {
+            description: "OpenID Client ID",
+            type: String,
+            optional: true,
+        },
+        "client-key": {
+            description: "OpenID Client Key",
+            type: String,
+            optional: true,
+        },
+        autocreate: {
+            description: "Automatically create users if they do not exist.",
+            optional: true,
+            type: bool,
+            default: false,
+        },
+        "username-claim": {
+            type: OpenIdUserAttribute,
+            optional: true,
+        },
+    },
+)]
+#[derive(Deserialize, Serialize)]
+#[serde(rename_all = "kebab-case")]
+/// Extra Information about a realm
+pub struct ExtraRealmInfo {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub issuer_url: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub client_id: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub client_key: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub autocreate: Option<bool>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub username_claim: Option<OpenIdUserAttribute>,
+}
+
+#[api(
+    properties: {
+        "info": {
+            type: BasicRealmInfo,
+        },
+        "extra": {
+            type: ExtraRealmInfo,
+        },
+    },
+)]
+#[derive(Deserialize, Serialize)]
+#[serde(rename_all = "kebab-case")]
+/// Information about a realm
+pub struct RealmInfo {
+    #[serde(flatten)]
+    pub info: BasicRealmInfo,
+    #[serde(flatten)]
+    pub extra: ExtraRealmInfo,
+}
 
 #[api(
     returns: {