diff --git a/api/user/link-dev-email.ts b/api/user/link-dev-email.ts
new file mode 100644
index 00000000..09f63581
--- /dev/null
+++ b/api/user/link-dev-email.ts
@@ -0,0 +1,96 @@
+import { getAdminClient } from "../_supabase";
+
+/**
+ * Link a .dev email to an existing profile (no merging, just email linking)
+ * Used when .dev account exists but was never onboarded
+ */
+export default async (req: Request) => {
+  if (req.method !== "POST") {
+    return new Response(JSON.stringify({ error: "Method not allowed" }), {
+      status: 405,
+      headers: { "Content-Type": "application/json" },
+    });
+  }
+
+  try {
+    // Check authorization
+    const authHeader = req.headers.get("authorization");
+    const adminToken = authHeader?.replace("Bearer ", "");
+
+    if (adminToken !== "mrpiglr-admin-token") {
+      return new Response(JSON.stringify({ error: "Unauthorized" }), {
+        status: 401,
+        headers: { "Content-Type": "application/json" },
+      });
+    }
+
+    const supabase = getAdminClient();
+    const devEmail = "mrpiglr@aethex.dev";
+    const mainEmail = "mrpiglr@gmail.com";
+
+    // Get the main user
+    const { data: mainUser, error: mainError } = await supabase
+      .from("user_profiles")
+      .select("user_id")
+      .eq("email", mainEmail)
+      .single();
+
+    if (mainError || !mainUser) {
+      return new Response(
+        JSON.stringify({ error: `User ${mainEmail} not found` }),
+        { status: 404, headers: { "Content-Type": "application/json" } }
+      );
+    }
+
+    // Check if .dev email is already linked
+    const { data: existing } = await supabase
+      .from("user_email_links")
+      .select("*")
+      .eq("email", devEmail)
+      .single();
+
+    if (existing) {
+      return new Response(
+        JSON.stringify({
+          success: true,
+          message: `.dev email already linked`,
+          email: devEmail,
+          user_id: mainUser.user_id,
+        }),
+        { status: 200, headers: { "Content-Type": "application/json" } }
+      );
+    }
+
+    // Link .dev email to main user
+    const { error: linkError } = await supabase.from("user_email_links").insert({
+      user_id: mainUser.user_id,
+      email: devEmail,
+      is_primary: false,
+      verified_at: new Date().toISOString(),
+    });
+
+    if (linkError) {
+      throw linkError;
+    }
+
+    return new Response(
+      JSON.stringify({
+        success: true,
+        message: `Successfully linked ${devEmail} to ${mainEmail}`,
+        devEmail,
+        mainEmail,
+        userId: mainUser.user_id,
+      }),
+      { status: 200, headers: { "Content-Type": "application/json" } }
+    );
+  } catch (error: any) {
+    console.error("[Link Dev Email Error]", error);
+    return new Response(
+      JSON.stringify({
+        error: "Failed to link email",
+        details: error.message,
+      }),
+      { status: 500, headers: { "Content-Type": "application/json" } }
+    );
+  }
+};