diff --git a/packages/loopover-mcp/bin/loopover-mcp.ts b/packages/loopover-mcp/bin/loopover-mcp.ts
index 4d2d28e96e..b0054bc50a 100644
--- a/packages/loopover-mcp/bin/loopover-mcp.ts
+++ b/packages/loopover-mcp/bin/loopover-mcp.ts
@@ -454,6 +454,14 @@ const loginShape = {
   login: z.string().min(1),
 };
 
+// #7762: stdio mirror of the remote loopover_mark_notifications_read shape (src/mcp/server.ts). login is
+// optional here, resolved from `login` / the active session / LOOPOVER_LOGIN like the notifications-read CLI;
+// ids is optional -- omit to mark every delivered notification read.
+const markNotificationsReadShape = {
+  login: z.string().min(1).optional(),
+  ids: z.array(z.string().min(1)).optional(),
+};
+
 const loginRepoShape = {
   login: z.string().min(1),
   owner: z.string().min(1),
@@ -1241,6 +1249,12 @@ const STDIO_TOOL_DESCRIPTORS = [
     description:
       "Return a contributor's own post-merge outcome records — for each merged PR, a public-safe attribution of what it did for their standing on the repo. Self-scoped: only the authenticated login's outcomes.",
   },
+  {
+    name: "loopover_mark_notifications_read",
+    category: "utility",
+    description:
+      "Mark a contributor's own delivered notifications as read (clears the badge). Self-scoped; pass `ids` to clear specific notifications or omit to clear all.",
+  },
   {
     name: "loopover_compare_pr_variants",
     category: "branch",
@@ -2318,6 +2332,22 @@ registerStdioTool(
   },
 );
 
+// #7762: stdio mirror of the remote loopover_mark_notifications_read + the notifications-read CLI. Reuses the
+// same postMarkNotificationsRead helper (POST /v1/contributors/:login/notifications/read) the CLI calls; login
+// resolves the same way (arg / active session / LOOPOVER_LOGIN), ids is optional (omit to mark all read).
+registerStdioTool(
+  "loopover_mark_notifications_read",
+  {
+    description: stdioToolDescription("loopover_mark_notifications_read"),
+    inputSchema: markNotificationsReadShape,
+  },
+  async ({ login, ids }: any) => {
+    const contributorLogin = login ?? activeProfile.session?.login ?? process.env.LOOPOVER_LOGIN ?? process.env.GITHUB_LOGIN;
+    if (!contributorLogin) throw new Error("No GitHub login: pass `login`, log in with `loopover-mcp login`, or set LOOPOVER_LOGIN.");
+    return toolResult(`Marked LoopOver notifications read for ${contributorLogin}.`, await postMarkNotificationsRead(contributorLogin, ids));
+  },
+);
+
 registerStdioTool(
   "loopover_compare_pr_variants",
   {
diff --git a/test/unit/mcp-cli-mark-notifications-read.test.ts b/test/unit/mcp-cli-mark-notifications-read.test.ts
new file mode 100644
index 0000000000..70f5551be5
--- /dev/null
+++ b/test/unit/mcp-cli-mark-notifications-read.test.ts
@@ -0,0 +1,103 @@
+import { Client } from "@modelcontextprotocol/sdk/client/index.js";
+import { InMemoryTransport } from "@modelcontextprotocol/sdk/inMemory.js";
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { closeFixtureServer, startFixtureServer } from "./support/mcp-cli-harness";
+
+// #7762: in-process coverage for the loopover_mark_notifications_read stdio tool. Same #7764 entrypoint-guard
+// pattern as mcp-cli-repo-focus-manifest -- import the .ts, hold the exported `server`, connect an
+// InMemoryTransport so v8/Codecov attributes the registerStdioTool block (a subprocess spawn cannot be
+// instrumented). The bin reuses postMarkNotificationsRead, so this drives the POST proxy end to end.
+const MODULES = ["../../packages/loopover-mcp/bin/loopover-mcp.ts"] as const;
+
+type BinModule = {
+  server: { connect: (transport: unknown) => Promise<void> };
+};
+
+let tempDir = "";
+const markReadBodies: unknown[] = [];
+const loaded = new Map<string, BinModule>();
+
+beforeAll(async () => {
+  tempDir = mkdtempSync(join(tmpdir(), "loopover-mark-notifications-read-"));
+  const apiUrl = await startFixtureServer({ onMarkNotificationsRead: (body) => markReadBodies.push(body) });
+  process.env.LOOPOVER_API_URL = apiUrl;
+  process.env.LOOPOVER_API_TOKEN = "in-process-token";
+  process.env.LOOPOVER_API_TIMEOUT_MS = "2000";
+  process.env.LOOPOVER_CONFIG_DIR = tempDir;
+  process.env.LOOPOVER_SKIP_NPM_VERSION_CHECK = "1";
+  for (const specifier of MODULES) {
+    loaded.set(specifier, (await import(specifier)) as unknown as BinModule);
+  }
+}, 120_000);
+
+afterAll(async () => {
+  await closeFixtureServer();
+  if (tempDir) rmSync(tempDir, { recursive: true, force: true });
+  delete process.env.LOOPOVER_API_URL;
+  delete process.env.LOOPOVER_API_TOKEN;
+  delete process.env.LOOPOVER_CONFIG_DIR;
+  delete process.env.LOOPOVER_SKIP_NPM_VERSION_CHECK;
+});
+
+describe("bin loopover_mark_notifications_read stdio tool (in-process, #7762)", () => {
+  it.each(MODULES)("registers and proxies POST .../notifications/read, marking all read — %s", async (specifier) => {
+    markReadBodies.length = 0;
+    const mod = loaded.get(specifier)!;
+    const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
+    await mod.server.connect(serverTransport);
+    const client = new Client({ name: "mark-notifications-read-test", version: "0.1.0" }, { capabilities: {} });
+    await client.connect(clientTransport);
+    try {
+      const { tools } = await client.listTools();
+      const tool = tools.find((entry) => entry.name === "loopover_mark_notifications_read");
+      expect(tool).toBeDefined();
+      expect(tool?.description).toMatch(/notifications as read|clears the badge/i);
+
+      // No ids -> mark every delivered notification read (empty POST body).
+      const all = await client.callTool({
+        name: "loopover_mark_notifications_read",
+        arguments: { login: "JSONbored" },
+      });
+      expect(all.isError).toBeFalsy();
+      expect(JSON.stringify(all)).toContain("marked");
+      expect(markReadBodies).toEqual([{}]);
+
+      // Explicit ids -> forwarded as { ids } in the POST body.
+      const some = await client.callTool({
+        name: "loopover_mark_notifications_read",
+        arguments: { login: "JSONbored", ids: ["d1", "d2"] },
+      });
+      expect(some.isError).toBeFalsy();
+      expect(markReadBodies[1]).toEqual({ ids: ["d1", "d2"] });
+    } finally {
+      await client.close().catch(() => undefined);
+    }
+  });
+
+  it.each(MODULES)("errors (no request) when no login can be resolved from arg/session/env — %s", async (specifier) => {
+    markReadBodies.length = 0;
+    // Exercise the login ?? session ?? env fallback chain bottoming out, and the resulting throw.
+    const savedLogin = process.env.LOOPOVER_LOGIN;
+    const savedGh = process.env.GITHUB_LOGIN;
+    delete process.env.LOOPOVER_LOGIN;
+    delete process.env.GITHUB_LOGIN;
+    const mod = loaded.get(specifier)!;
+    const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
+    await mod.server.connect(serverTransport);
+    const client = new Client({ name: "mark-notifications-read-nologin", version: "0.1.0" }, { capabilities: {} });
+    await client.connect(clientTransport);
+    try {
+      const result = await client.callTool({ name: "loopover_mark_notifications_read", arguments: {} });
+      expect(result.isError).toBe(true);
+      expect(JSON.stringify(result.content)).toMatch(/No GitHub login|LOOPOVER_LOGIN/i);
+      expect(markReadBodies).toEqual([]);
+    } finally {
+      await client.close().catch(() => undefined);
+      if (savedLogin !== undefined) process.env.LOOPOVER_LOGIN = savedLogin;
+      if (savedGh !== undefined) process.env.GITHUB_LOGIN = savedGh;
+    }
+  });
+});
diff --git a/test/unit/mcp-tool-rename-aliases.test.ts b/test/unit/mcp-tool-rename-aliases.test.ts
index cc89b6f112..7ec08b47c5 100644
--- a/test/unit/mcp-tool-rename-aliases.test.ts
+++ b/test/unit/mcp-tool-rename-aliases.test.ts
@@ -31,6 +31,7 @@
 // (#7800 registered the loopover_get_gate_config_effective remote+stdio tool, taking the count from 86 to 87.)
 // (#7797 registered the loopover_get_ams_miner_cohort remote+stdio tool, taking the count from 87 to 88.)
 // (#7808 registered the loopover_get_repo_focus_manifest remote+stdio tool, taking the count from 88 to 89.)
+// (#7762 registered the loopover_mark_notifications_read stdio tool, taking the count from 89 to 90.)
 import { Client } from "@modelcontextprotocol/sdk/client/index.js";
 import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";
 import { mkdtempSync, rmSync } from "node:fs";
@@ -77,14 +78,14 @@ describe("MCP legacy alias retirement (#4777) — discovery invariants", () => {
   });
   afterEach(disconnect);
 
-  it("lists exactly 89 loopover_ tools and zero gittensory_-prefixed aliases", async () => {
+  it("lists exactly 90 loopover_ tools and zero gittensory_-prefixed aliases", async () => {
     const { tools } = await client.listTools();
     const names = tools.map((t) => t.name);
     const primary = names.filter((n) => n.startsWith("loopover_"));
     const legacy = names.filter((n) => n.startsWith("gittensory_"));
-    expect(primary.length).toBe(89);
+    expect(primary.length).toBe(90);
     expect(legacy.length).toBe(0);
-    expect(names.length).toBe(89);
+    expect(names.length).toBe(90);
   });
 
   it("no loopover_ tool's description carries a stale deprecation notice", async () => {
@@ -96,14 +97,14 @@ describe("MCP legacy alias retirement (#4777) — discovery invariants", () => {
     }
   });
 
-  it("`loopover-mcp tools --json` reports the same 89-tool count the live server registers", async () => {
+  it("`loopover-mcp tools --json` reports the same 90-tool count the live server registers", async () => {
     const { tools } = await client.listTools();
     const payload = JSON.parse(run(["tools", "--json"])) as {
       count: number;
       tools: Array<{ name: string }>;
     };
     expect(payload.count).toBe(tools.length);
-    expect(payload.count).toBe(89);
+    expect(payload.count).toBe(90);
     expect([...payload.tools.map((t) => t.name)].sort()).toEqual(
       [...tools.map((t) => t.name)].sort(),
     );