diff --git a/apps/dashboard/src/app/(dashboard)/projects/[id]/components/OverviewTab.connection.test.tsx b/apps/dashboard/src/app/(dashboard)/projects/[id]/components/OverviewTab.connection.test.tsx
new file mode 100644
index 000000000..b836322c4
--- /dev/null
+++ b/apps/dashboard/src/app/(dashboard)/projects/[id]/components/OverviewTab.connection.test.tsx
@@ -0,0 +1,147 @@
+// @vitest-environment happy-dom
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { I18nProvider } from "@/components/i18n-provider";
+import type { AppConnectionOutput } from "@/lib/api/apps";
+import { OverviewTab } from "./OverviewTab";
+
+const h = vi.hoisted(() => ({
+  connection: vi.fn(),
+  project: {} as Record<string, unknown>,
+  services: [] as Array<Record<string, unknown>>,
+}));
+vi.mock("@/context/ProjectSettingsContext", () => ({
+  useProjectSettings: () => ({
+    projectData: h.project,
+    buildData: {},
+    id: "project-one",
+    setActiveTab: vi.fn(),
+    servicesData: { isLoading: false, services: h.services },
+    selectedDomain: "",
+    domain: "",
+    domainsData: { domains: [] },
+  }),
+}));
+vi.mock("@/hooks/useProjectEndpoints", () => ({
+  useProjectInfo: () => ({ isLoading: false }),
+  useAnalyticsData: () => ({ data: null, isLoadingSummary: false, isLoadingPeriods: false }),
+}));
+vi.mock("@/lib/api/apps", () => ({ appsApi: { getConnection: h.connection } }));
+vi.mock("@/hooks/useLocalhostForward", () => ({
+  useLocalhostForward: () => ({ canForward: false }),
+}));
+vi.mock("./ConnectedServicesCard", () => ({ ConnectedServicesCard: () => null }));
+vi.mock("./UsedByCard", () => ({ UsedByCard: () => null }));
+vi.mock("./UseInProjectModal", () => ({
+  UseInProjectModal: ({
+    sourceProjectId,
+    outputs,
+  }: {
+    sourceProjectId: string;
+    outputs: AppConnectionOutput[];
+  }) => (
+    <div role="dialog">
+      {sourceProjectId}: {outputs.map((o) => o.value).join(", ")}
+    </div>
+  ),
+}));
+
+let root: Root;
+let container: HTMLDivElement;
+const output: AppConnectionOutput = {
+  id: "internal",
+  label: "Internal address",
+  value: "http://api:3000",
+  secret: false,
+  service: null,
+  internal: true,
+};
+async function render() {
+  await act(async () =>
+    root.render(
+      <I18nProvider>
+        <OverviewTab />
+      </I18nProvider>,
+    ),
+  );
+}
+function useButton() {
+  return [...container.querySelectorAll("button")].find((b) =>
+    b.textContent?.includes("Use in a project"),
+  );
+}
+
+beforeEach(() => {
+  vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);
+  localStorage.clear();
+  h.project = {
+    id: "project-one",
+    name: "API",
+    slug: "api",
+    isApp: false,
+    hasServer: true,
+    workloadType: "web",
+    productionMode: "server",
+    port: 3000,
+    deployTarget: "server",
+    serverId: "server-one",
+  };
+  h.services = [];
+  h.connection.mockReset().mockResolvedValue({ data: { outputs: [output] } });
+  container = document.createElement("div");
+  document.body.appendChild(container);
+  root = createRoot(container);
+});
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+  vi.unstubAllGlobals();
+});
+
+describe("project connection discovery (#504)", () => {
+  it("lets a plain single app open the existing connection flow with its resolved outputs", async () => {
+    await render();
+    expect(h.connection).toHaveBeenCalledWith("project-one");
+    expect(useButton()).toBeDefined();
+    await act(async () => useButton()!.click());
+    expect(container.querySelector('[role="dialog"]')?.textContent).toContain(
+      "project-one: http://api:3000",
+    );
+  });
+
+  it("keeps catalog connection details available", async () => {
+    h.project.isApp = true;
+    h.project.appTemplateId = "database";
+    await render();
+    expect(useButton()).toBeDefined();
+  });
+
+  it("does not offer a static or worker project with no connection outputs", async () => {
+    h.project.workloadType = "static";
+    h.project.hasServer = false;
+    h.connection.mockResolvedValue({ data: { outputs: [] } });
+    await render();
+    expect(h.connection).toHaveBeenCalledOnce();
+    expect(useButton()).toBeUndefined();
+  });
+
+  it("shows reachable service outputs even when the parent project is static", async () => {
+    h.project.workloadType = "static";
+    h.project.hasServer = false;
+    h.project.productionMode = "static";
+    h.services = [{ id: "redis", name: "redis", ports: ["6379"], enabled: true }];
+    h.connection.mockResolvedValue({
+      data: { outputs: [{ ...output, value: "redis://redis:6379" }] },
+    });
+    await render();
+    expect(useButton()).toBeDefined();
+  });
+
+  it("does not offer a synthesized Docker-network address for a cloud project", async () => {
+    h.project.deployTarget = "cloud";
+    await render();
+    expect(h.connection).not.toHaveBeenCalled();
+    expect(useButton()).toBeUndefined();
+  });
+});
diff --git a/apps/dashboard/src/app/(dashboard)/projects/[id]/components/OverviewTab.tsx b/apps/dashboard/src/app/(dashboard)/projects/[id]/components/OverviewTab.tsx
index c0daef4e2..39195c82f 100644
--- a/apps/dashboard/src/app/(dashboard)/projects/[id]/components/OverviewTab.tsx
+++ b/apps/dashboard/src/app/(dashboard)/projects/[id]/components/OverviewTab.tsx
@@ -179,12 +179,10 @@ export const OverviewTab = () => {
 
   return (
     <div className="space-y-5">
-      {/* Only a catalog app's curated connection (URLs + generated keys) belongs on
-          the overview. A plain project's synthesized internal address is edited in
-          Settings → Advanced (single-app alias) and shown per service in the service
-          detail panel — surfacing it here too just clutters a plain project. Card
-          self-hides when the app declares no connection outputs. */}
-      {projectData.isApp && (
+      {/* The API resolves reachable outputs, including services attached to a
+          static project. The card hides itself when none exist. Synthesized
+          internal addresses are only useful on self-hosted targets. */}
+      {projectData.id && (projectData.isApp || deployTarget !== "cloud") && (
         <ConnectionCard
           projectId={projectData.id}
           appTemplateId={projectData.appTemplateId}