diff --git a/src/Umbraco.Web.UI.Client/schemas/api/api.yml b/src/Umbraco.Web.UI.Client/schemas/api/api.yml
index 26aac5895b..dba85c3812 100644
--- a/src/Umbraco.Web.UI.Client/schemas/api/api.yml
+++ b/src/Umbraco.Web.UI.Client/schemas/api/api.yml
@@ -99,7 +99,26 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/UmbracoInstaller'
+              $ref: '#/components/schemas/UmbracoInstallerPerformInstallRequest'
+        required: true
+      responses:
+        '201':
+          description: 201 response
+        '400':
+          description: 400 response
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+  /install/database/validate:
+    post:
+      operationId: PostInstallValidateDatabase
+      parameters: []
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UmbracoInstallerDatabaseConfiguration'
         required: true
       responses:
         '201':
@@ -277,3 +296,45 @@ components:
       required:
         - installId
         - steps
+    UmbracoInstallerDatabaseConfiguration:
+      type: object
+      properties:
+        connectionString:
+          type: string
+        providerName:
+          type: string
+        integratedAuth:
+          type: boolean
+        databaseProviderMetadataId:
+          type: string
+      required:
+        - connectionString
+        - providerName
+        - integratedAuth
+        - databaseProviderMetadataId
+    UmbracoInstallerPerformInstallRequest:
+      type: object
+      properties:
+        name:
+          type: string
+        email:
+          type: string
+        password:
+          type: string
+        subscribeToNewsletter:
+          type: boolean
+        telemetryLevel:
+          type: string
+          enum:
+            - Minimal
+            - Basic
+            - Detailed
+        database:
+          $ref: '#/components/schemas/UmbracoInstallerDatabaseConfiguration'
+      required:
+        - name
+        - email
+        - password
+        - subscribeToNewsletter
+        - telemetryLevel
+        - database
diff --git a/src/Umbraco.Web.UI.Client/schemas/generated-schema.ts b/src/Umbraco.Web.UI.Client/schemas/generated-schema.ts
index a7647a5744..cc4a3370ec 100644
--- a/src/Umbraco.Web.UI.Client/schemas/generated-schema.ts
+++ b/src/Umbraco.Web.UI.Client/schemas/generated-schema.ts
@@ -23,6 +23,9 @@ export interface paths {
     get: operations["GetInstall"];
     post: operations["PostInstall"];
   };
+  "/install/database/validate": {
+    post: operations["PostInstallValidateDatabase"];
+  };
 }
 
 export interface components {
@@ -91,6 +94,21 @@ export interface components {
       installId: string;
       steps: components["schemas"]["UmbracoInstallerStep"][];
     };
+    UmbracoInstallerDatabaseConfiguration: {
+      connectionString: string;
+      providerName: string;
+      integratedAuth: boolean;
+      databaseProviderMetadataId: string;
+    };
+    UmbracoInstallerPerformInstallRequest: {
+      name: string;
+      email: string;
+      password: string;
+      subscribeToNewsletter: boolean;
+      /** @enum {string} */
+      telemetryLevel: "Minimal" | "Basic" | "Detailed";
+      database: components["schemas"]["UmbracoInstallerDatabaseConfiguration"];
+    };
   };
 }
 
@@ -197,7 +215,25 @@ export interface operations {
     };
     requestBody: {
       content: {
-        "application/json": components["schemas"]["UmbracoInstaller"];
+        "application/json": components["schemas"]["UmbracoInstallerPerformInstallRequest"];
+      };
+    };
+  };
+  PostInstallValidateDatabase: {
+    parameters: {};
+    responses: {
+      /** 201 response */
+      201: unknown;
+      /** 400 response */
+      400: {
+        content: {
+          "application/json": components["schemas"]["ErrorResponse"];
+        };
+      };
+    };
+    requestBody: {
+      content: {
+        "application/json": components["schemas"]["UmbracoInstallerDatabaseConfiguration"];
       };
     };
   };
diff --git a/src/Umbraco.Web.UI.Client/src/installer/installer-user.element.ts b/src/Umbraco.Web.UI.Client/src/installer/installer-user.element.ts
index 09592a8dca..d045d35a40 100644
--- a/src/Umbraco.Web.UI.Client/src/installer/installer-user.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/installer/installer-user.element.ts
@@ -41,11 +41,23 @@ export class UmbInstallerUser extends LitElement {
     this._install(name, email, password, news);
   };
 
-  private async _install(name: string, email: string, password: string, news: boolean) {
-    console.log('Installing', name, email, password, news);
+  private async _install(name: string, email: string, password: string, subscribeToNewsletter: boolean) {
+    console.log('Installing', name, email, password, subscribeToNewsletter);
 
     try {
-      await postInstall({});
+      await postInstall({
+        name,
+        email,
+        password,
+        telemetryLevel: 'Basic',
+        subscribeToNewsletter,
+        database: {
+          connectionString: '',
+          databaseProviderMetadataId: '1',
+          integratedAuth: false,
+          providerName: 'SQLite'
+        }
+      });
 
       // TODO: Change to redirect when router has been added.
       this.dispatchEvent(new CustomEvent('install', { bubbles: true, composed: true }));
diff --git a/src/Umbraco.Web.UI.Client/temp-schema-generator/installer.ts b/src/Umbraco.Web.UI.Client/temp-schema-generator/installer.ts
index 858ccbddc0..3e3c4a4ce4 100644
--- a/src/Umbraco.Web.UI.Client/temp-schema-generator/installer.ts
+++ b/src/Umbraco.Web.UI.Client/temp-schema-generator/installer.ts
@@ -17,7 +17,7 @@ export class GetInstall {
 })
 export class PostInstall {
     @request
-    request(@body body: UmbracoInstaller) { }
+    request(@body body: UmbracoInstallerPerformInstallRequest) { }
 
     @response({ status: 201 })
     success() { }
@@ -26,6 +26,37 @@ export class PostInstall {
     badRequest(@body body: ErrorResponse) { }
 }
 
+@endpoint({
+    method: 'POST',
+    path: '/install/database/validate'
+})
+export class PostInstallValidateDatabase {
+    @request
+    request(@body body: UmbracoInstallerDatabaseConfiguration) { }
+
+    @response({ status: 201 })
+    success() { }
+
+    @response({ status: 400 })
+    badRequest(@body body: ErrorResponse) { }
+}
+
+export interface UmbracoInstallerPerformInstallRequest {
+    name: string;
+    email: string;
+    password: string;
+    subscribeToNewsletter: boolean;
+    telemetryLevel: 'Minimal' | 'Basic' | 'Detailed';
+    database: UmbracoInstallerDatabaseConfiguration;
+}
+
+export interface UmbracoInstallerDatabaseConfiguration {
+    connectionString: string;
+    providerName: string;
+    integratedAuth: boolean;
+    databaseProviderMetadataId: string;
+}
+
 export interface UmbracoInstaller {
     installId: string;
     steps: UmbracoInstallerStep[];