diff --git a/devfront/tests/devfront-developer-request.spec.ts b/devfront/tests/devfront-developer-request.spec.ts
new file mode 100644
index 00000000..ee34e677
--- /dev/null
+++ b/devfront/tests/devfront-developer-request.spec.ts
@@ -0,0 +1,144 @@
+import { expect, test } from "@playwright/test";
+import {
+  type DeveloperRequest,
+  installDevApiMock,
+  seedAuth,
+} from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
+
+test.describe("DevFront developer request and management", () => {
+  test.afterEach(async ({ page }, testInfo) => {
+    if (testInfo.status === "passed") {
+      await captureEvidence(page, testInfo, testInfo.title);
+    }
+  });
+
+  test.beforeEach(async ({ page }) => {
+    page.on("dialog", async (dialog) => {
+      await dialog.accept();
+    });
+  });
+
+  test("user can request developer access when no RP exists", async ({ page }) => {
+    const state = {
+      clients: [],
+      consents: [],
+      developerRequests: [],
+    };
+    await seedAuth(page, "user"); 
+    await installDevApiMock(page, state);
+
+    await page.goto("/clients");
+
+    // Click Request Button
+    const requestBtn = page.getByRole('button', { name: /개발자 등록 신청/ });
+    await requestBtn.waitFor({ state: 'visible' });
+    await requestBtn.click();
+
+    // Fill Form (using direct selectors for reliability)
+    await page.locator("#org").fill("QA Team");
+    await page.locator("#reason").fill("Need to test OIDC integration");
+    
+    // Submit
+    await page.getByRole('button', { name: /신청하기|Submit/ }).click();
+
+    // Verify Status - Look for "Pending" or "대기" anywhere
+    await expect(page.locator("body")).toContainText(/대기|Pending/);
+  });
+
+  test("super admin can approve, reject and cancel developer requests", async ({ page }) => {
+    const request: DeveloperRequest = {
+      id: "req-admin-test",
+      userId: "user-1",
+      userName: "Requester User",
+      name: "Requester User", 
+      userEmail: "user1@example.com",
+      organization: "Dev Team",
+      reason: "API Test",
+      status: "pending",
+      createdAt: new Date().toISOString(),
+      updatedAt: new Date().toISOString(),
+    };
+
+    const state = {
+      clients: [],
+      consents: [],
+      developerRequests: [request],
+    };
+
+    await seedAuth(page, "super_admin");
+    await installDevApiMock(page, state);
+
+    await page.goto("/developer-requests");
+
+    // Wait for data to load
+    await page.waitForLoadState('networkidle');
+    await expect(page.locator("table")).toContainText("Requester User", { timeout: 10000 });
+
+    // Approve
+    const approveBtn = page.getByRole('button', { name: '승인' }).first();
+    await approveBtn.click();
+    await expect(page.locator("table")).toContainText(/승인됨|Approved/);
+
+    // Cancel approval (Requires notes)
+    await page.locator("input.h-8").first().fill("Cancellation reason");
+    await page.getByRole('button', { name: '승인 취소' }).click();
+    await expect(page.locator("table")).toContainText(/대기|Pending/);
+
+    // Reject (Requires notes)
+    await page.locator("input.h-8").first().fill("Rejection reason");
+    await page.getByRole('button', { name: '반려' }).click();
+    await expect(page.locator("table")).toContainText(/반려됨|Rejected/);
+  });
+
+  test("approved user can see 'Add App' guidance and create RP", async ({ page }) => {
+    const request: DeveloperRequest = {
+      id: "req-approved",
+      userId: "playwright-user",
+      userName: "Playwright User",
+      name: "Playwright User",
+      userEmail: "playwright@example.com",
+      organization: "QA",
+      reason: "Test",
+      status: "approved",
+      createdAt: new Date().toISOString(),
+      updatedAt: new Date().toISOString(),
+      approvedAt: new Date().toISOString(),
+    };
+
+    const state = {
+      clients: [],
+      consents: [],
+      developerRequests: [request],
+    };
+
+    await seedAuth(page, "rp_admin"); 
+    await installDevApiMock(page, state);
+
+    await page.goto("/clients");
+    
+    // Click Add App
+    const createBtn = page.getByRole('button', { name: /연동 앱 추가/ }).first();
+    await createBtn.click();
+
+    // Fill Form (Must fill all mandatory fields to enable Submit)
+    await expect(page).toHaveURL(/\/clients\/new$/);
+    
+    const nameInput = page.locator("input[placeholder*='Awesome']");
+    await nameInput.fill("E2E Test RP");
+    await nameInput.press('Tab');
+
+    const uriInput = page.locator("textarea.font-mono");
+    await uriInput.fill("https://example.com/callback");
+    await uriInput.press('Tab');
+    
+    // Submit
+    const submitBtn = page.getByRole('button', { name: /생성/ }).filter({ hasNotText: '취소' });
+    await expect(submitBtn).toBeEnabled({ timeout: 10000 });
+    await submitBtn.click();
+
+    // Verification
+    await expect(page).toHaveURL(/\/clients\/client-\d+\/settings$/);
+    await expect(page.locator("h1")).toContainText(/설정|Settings/);
+  });
+});
diff --git a/devfront/tests/helpers/devfront-fixtures.ts b/devfront/tests/helpers/devfront-fixtures.ts
index e8200f9b..e29e9016 100644
--- a/devfront/tests/helpers/devfront-fixtures.ts
+++ b/devfront/tests/helpers/devfront-fixtures.ts
@@ -53,6 +53,25 @@ export type Consent = {
   tenantName: string;
 };
 
+export type DeveloperRequestStatus = "pending" | "approved" | "rejected";
+
+export type DeveloperRequest = {
+  id: string;
+  userId: string;
+  userName: string;
+  name?: string; // 추가
+  userEmail: string;
+  organization: string;
+  reason: string;
+  status: DeveloperRequestStatus;
+  createdAt: string;
+  updatedAt: string;
+  approvedAt?: string;
+  rejectedAt?: string;
+  comment?: string;
+  adminNotes?: string; // 추가
+};
+
 export type ClientRelation = {
   relation: string;
   subject: string;
@@ -84,6 +103,7 @@ export type AuditLog = {
 export type DevApiMockState = {
   clients: Client[];
   consents: Consent[];
+  developerRequests?: DeveloperRequest[];
   relations?: Record<string, ClientRelation[]>;
   users?: DevAssignableUser[];
   auditLogsByCursor?: Record<
@@ -241,6 +261,79 @@ export async function installDevApiMock(page: Page, state: DevApiMockState) {
     const { pathname, searchParams } = url;
     const method = request.method();
 
+    if (pathname === "/api/v1/dev/requests" && method === "GET") {
+      return json(route, { items: state.developerRequests ?? [] });
+    }
+
+    if (pathname === "/api/v1/dev/requests" && method === "POST") {
+      const payload = (request.postDataJSON() as {
+        organization?: string;
+        reason?: string;
+      }) || {};
+      const created: DeveloperRequest = {
+        id: `req-${Date.now()}`,
+        userId: "playwright-user",
+        userName: "Playwright User",
+        userEmail: "playwright@example.com",
+        organization: payload.organization ?? "Unknown",
+        reason: payload.reason ?? "No reason",
+        status: "pending",
+        createdAt: new Date().toISOString(),
+        updatedAt: new Date().toISOString(),
+      };
+      if (!state.developerRequests) {
+        state.developerRequests = [];
+      }
+      state.developerRequests.push(created);
+      return json(route, created, 201);
+    }
+
+    if (pathname === "/api/v1/dev/requests/status" && method === "GET") {
+      const myRequest = (state.developerRequests ?? []).find(
+        (r) => r.userId === "playwright-user",
+      );
+      return json(route, myRequest || null);
+    }
+
+    if (
+      pathname.startsWith("/api/v1/dev/requests/") &&
+      pathname.endsWith("/approve") &&
+      method === "POST"
+    ) {
+      const reqId = pathname.split("/")[5] ?? "";
+      const found = state.developerRequests?.find((r) => r.id === reqId);
+      if (!found) return json(route, { error: "not found" }, 404);
+      found.status = "approved";
+      found.approvedAt = new Date().toISOString();
+      return json(route, found);
+    }
+
+    if (
+      pathname.startsWith("/api/v1/dev/requests/") &&
+      pathname.endsWith("/reject") &&
+      method === "POST"
+    ) {
+      const reqId = pathname.split("/")[5] ?? "";
+      const found = state.developerRequests?.find((r) => r.id === reqId);
+      if (!found) return json(route, { error: "not found" }, 404);
+      found.status = "rejected";
+      found.rejectedAt = new Date().toISOString();
+      return json(route, found);
+    }
+
+    if (
+      pathname.startsWith("/api/v1/dev/requests/") &&
+      pathname.endsWith("/cancel") &&
+      method === "POST"
+    ) {
+      const reqId = pathname.split("/")[5] ?? "";
+      const found = state.developerRequests?.find((r) => r.id === reqId);
+      if (!found) return json(route, { error: "not found" }, 404);
+      found.status = "pending";
+      found.approvedAt = undefined;
+      return json(route, found);
+    }
+
     if (pathname === "/api/v1/dev/my-tenants" && method === "GET") {
       return json(route, [
         { id: "tenant-a", name: "Tenant A", slug: "tenant-a" },