diff --git a/app/v1/installations/[installationId]/route.ts b/app/v1/installations/[installationId]/route.ts
index 28ad334..2c1609c 100644
--- a/app/v1/installations/[installationId]/route.ts
+++ b/app/v1/installations/[installationId]/route.ts
@@ -55,6 +55,7 @@ export const GET = withAuth(async (claims) => {
     (plan) => plan.id === installation.billingPlanId
   );
   return Response.json({
+    metadata: installation.metadata,
     billingPlan: {
       ...billingPlan,
       scope: "installation",
@@ -72,10 +73,10 @@ export const PATCH = withAuth(async (claims, request) => {
     return new Response(null, { status: 400 });
   }
 
-  await updateInstallation(
-    claims.installation_id,
-    requestBody.data.billingPlanId
-  );
+  await updateInstallation(claims.installation_id, {
+    billingPlanId: requestBody.data.billingPlanId,
+    metadata: requestBody.data.metadata,
+  });
 
   return new Response(null, { status: 204 });
 });
diff --git a/app/v1/installations/new/plans/route.ts b/app/v1/installations/new/plans/route.ts
new file mode 100644
index 0000000..8666ff5
--- /dev/null
+++ b/app/v1/installations/new/plans/route.ts
@@ -0,0 +1,7 @@
+import { getNewInstallationtBillingPlans } from "@/lib/partner";
+import { withAuth } from "@/lib/vercel/auth";
+
+export const GET = withAuth(async () => {
+  const billingPlans = await getNewInstallationtBillingPlans();
+  return Response.json(billingPlans);
+});
diff --git a/lib/partner/index.ts b/lib/partner/index.ts
index b425853..1ae34e0 100644
--- a/lib/partner/index.ts
+++ b/lib/partner/index.ts
@@ -85,11 +85,18 @@ export async function installIntegration(
 
 export async function updateInstallation(
   installationId: string,
-  billingPlanId: string
+  {
+    billingPlanId,
+    metadata,
+  }: { billingPlanId: string; metadata?: Record<string, unknown> }
 ): Promise<void> {
   const installation = await getInstallation(installationId);
   const pipeline = kv.pipeline();
-  await pipeline.set(installationId, { ...installation, billingPlanId });
+  await pipeline.set(installationId, {
+    ...installation,
+    billingPlanId,
+    metadata: metadata !== undefined ? metadata : installation.metadata,
+  });
   await pipeline.exec();
 }
 
@@ -140,7 +147,9 @@ export async function provisionResource(
     serializeResource(resource)
   );
   await kv.lpush(`${installationId}:resources`, resource.id);
-  await updateInstallation(installationId, request.billingPlanId);
+  await updateInstallation(installationId, {
+    billingPlanId: request.billingPlanId,
+  });
 
   return {
     ...resource,
@@ -421,6 +430,14 @@ export async function getInstallationtBillingPlans(
   };
 }
 
+export async function getNewInstallationtBillingPlans(
+  _experimental_metadata?: Record<string, unknown>
+): Promise<GetBillingPlansResponse> {
+  return {
+    plans: billingPlans,
+  };
+}
+
 export async function getProductBillingPlans(
   _productId: string,
   installationId: string,
@@ -446,6 +463,7 @@ export async function getInstallation(installationId: string): Promise<
   InstallIntegrationRequest & {
     type: "marketplace" | "external";
     billingPlanId: string;
+    metadata?: Record<string, unknown>;
     deletedAt?: number;
   }
 > {
@@ -453,6 +471,7 @@ export async function getInstallation(installationId: string): Promise<
     InstallIntegrationRequest & {
       type: "marketplace" | "external";
       billingPlanId: string;
+      metadata?: Record<string, unknown>;
       deletedAt?: number;
     }
   >(installationId);
diff --git a/lib/vercel/auth.ts b/lib/vercel/auth.ts
index b86fdfa..7127f3c 100644
--- a/lib/vercel/auth.ts
+++ b/lib/vercel/auth.ts
@@ -50,7 +50,7 @@ export async function verifyToken(token: string): Promise<OidcClaims> {
     );
 
     if (claims.aud !== env.INTEGRATION_CLIENT_ID) {
-      throw new AuthError("Invalid audience");
+      throw new AuthError(`Invalid audience: ${claims.aud}`);
     }
 
     if (claims.iss !== "https://marketplace.vercel.com") {
diff --git a/lib/vercel/schemas.ts b/lib/vercel/schemas.ts
index f748c73..b3e6b65 100644
--- a/lib/vercel/schemas.ts
+++ b/lib/vercel/schemas.ts
@@ -21,6 +21,8 @@ export const usageTypeSchema = z.enum(["total", "interval", "rate"]);
 
 export type UsageType = z.infer<typeof usageTypeSchema>;
 
+const metadataSchema = z.record(z.unknown());
+
 // Account and Installation
 
 export const installIntegrationRequestSchema = z.object({
@@ -30,10 +32,13 @@ export const installIntegrationRequestSchema = z.object({
     access_token: z.string().min(1),
     token_type: z.string().min(1),
   }),
+  billingPlanId: z.string().optional(),
+  metadata: metadataSchema.optional(),
 });
 
 export const updateInstallationRequestSchema = z.object({
   billingPlanId: z.string(),
+  metadata: metadataSchema.optional(),
 });
 
 export type InstallIntegrationRequest = z.infer<
@@ -169,8 +174,6 @@ export type ProvisionPurchaseResponse = z.infer<
 
 // Product
 
-const metadataSchema = z.record(z.unknown());
-
 const notificationSchema = z.object({
   level: z.enum(["info", "warn", "error"]),
   title: z.string().max(100),