diff --git a/apps/backend/src/route-handlers/smart-request.tsx b/apps/backend/src/route-handlers/smart-request.tsx
index 3fe6644f9..6e017dd6e 100644
--- a/apps/backend/src/route-handlers/smart-request.tsx
+++ b/apps/backend/src/route-handlers/smart-request.tsx
@@ -158,21 +158,21 @@ async function parseAuth(req: NextRequest): Promise<SmartRequestAuth | null> {
       case "client": {
         if (!publishableClientKey) throw new KnownErrors.ClientAuthenticationRequired();
         const isValid = await checkApiKeySet(projectId, { publishableClientKey });
-        if (!isValid) throw new KnownErrors.InvalidPublishableClientKey();
+        if (!isValid) throw new KnownErrors.InvalidPublishableClientKey(projectId);
         projectAccessType = "key";
         break;
       }
       case "server": {
         if (!secretServerKey) throw new KnownErrors.ServerAuthenticationRequired();
         const isValid = await checkApiKeySet(projectId, { secretServerKey });
-        if (!isValid) throw new KnownErrors.InvalidSecretServerKey();
+        if (!isValid) throw new KnownErrors.InvalidSecretServerKey(projectId);
         projectAccessType = "key";
         break;
       }
       case "admin": {
         if (!superSecretAdminKey) throw new KnownErrors.AdminAuthenticationRequired();
         const isValid = await checkApiKeySet(projectId, { superSecretAdminKey });
-        if (!isValid) throw new KnownErrors.InvalidSuperSecretAdminKey();
+        if (!isValid) throw new KnownErrors.InvalidSuperSecretAdminKey(projectId);
         projectAccessType = "key";
         break;
       }
diff --git a/apps/dashboard/src/route-handlers/smart-request.tsx b/apps/dashboard/src/route-handlers/smart-request.tsx
index b188ac82e..1f9c6bcd4 100644
--- a/apps/dashboard/src/route-handlers/smart-request.tsx
+++ b/apps/dashboard/src/route-handlers/smart-request.tsx
@@ -158,21 +158,21 @@ async function parseAuth(req: NextRequest): Promise<SmartRequestAuth | null> {
       case "client": {
         if (!publishableClientKey) throw new KnownErrors.ClientAuthenticationRequired();
         const isValid = await checkApiKeySet(projectId, { publishableClientKey });
-        if (!isValid) throw new KnownErrors.InvalidPublishableClientKey();
+        if (!isValid) throw new KnownErrors.InvalidPublishableClientKey(projectId);
         projectAccessType = "key";
         break;
       }
       case "server": {
         if (!secretServerKey) throw new KnownErrors.ServerAuthenticationRequired();
         const isValid = await checkApiKeySet(projectId, { secretServerKey });
-        if (!isValid) throw new KnownErrors.InvalidSecretServerKey();
+        if (!isValid) throw new KnownErrors.InvalidSecretServerKey(projectId);
         projectAccessType = "key";
         break;
       }
       case "admin": {
         if (!superSecretAdminKey) throw new KnownErrors.AdminAuthenticationRequired();
         const isValid = await checkApiKeySet(projectId, { superSecretAdminKey });
-        if (!isValid) throw new KnownErrors.InvalidSuperSecretAdminKey();
+        if (!isValid) throw new KnownErrors.InvalidSuperSecretAdminKey(projectId);
         projectAccessType = "key";
         break;
       }
diff --git a/packages/stack-shared/src/known-errors.tsx b/packages/stack-shared/src/known-errors.tsx
index 99d4ae58f..dba8f38d2 100644
--- a/packages/stack-shared/src/known-errors.tsx
+++ b/packages/stack-shared/src/known-errors.tsx
@@ -240,31 +240,40 @@ const RequestTypeWithoutProjectId = createKnownErrorConstructor(
 const InvalidPublishableClientKey = createKnownErrorConstructor(
   InvalidProjectAuthentication,
   "INVALID_PUBLISHABLE_CLIENT_KEY",
-  () => [
+  (projectId: string) => [
     401,
-    "The publishable key is not valid for the given project. Does the project and/or the key exist?",
+    `The publishable key is not valid for the project ${JSON.stringify(projectId)}. Does the project and/or the key exist?`,
+    {
+      projectId,
+    },
   ] as const,
-  () => [] as const,
+  (json: any) => [json.projectId] as const,
 );
 
 const InvalidSecretServerKey = createKnownErrorConstructor(
   InvalidProjectAuthentication,
   "INVALID_SECRET_SERVER_KEY",
-  () => [
+  (projectId: string) => [
     401,
-    "The secret server key is not valid for the given project. Does the project and/or the key exist?",
+    `The secret server key is not valid for the project ${JSON.stringify(projectId)}. Does the project and/or the key exist?`,
+    {
+      projectId,
+    },
   ] as const,
-  () => [] as const,
+  (json: any) => [json.projectId] as const,
 );
 
 const InvalidSuperSecretAdminKey = createKnownErrorConstructor(
   InvalidProjectAuthentication,
   "INVALID_SUPER_SECRET_ADMIN_KEY",
-  () => [
+  (projectId: string) => [
     401,
-    "The super secret admin key is not valid for the given project. Does the project and/or the key exist?",
+    `The super secret admin key is not valid for the project ${JSON.stringify(projectId)}. Does the project and/or the key exist?`,
+    {
+      projectId,
+    },
   ] as const,
-  () => [] as const,
+  (json: any) => [json.projectId] as const,
 );
 
 const InvalidAdminAccessToken = createKnownErrorConstructor(