diff --git a/apps/cli/src/bundle.integration.test.ts b/apps/cli/src/bundle.integration.test.ts
index 11d8e0714..0be88fa5b 100644
--- a/apps/cli/src/bundle.integration.test.ts
+++ b/apps/cli/src/bundle.integration.test.ts
@@ -44,12 +44,14 @@ let server: Server;
 let port: number;
 let bundleDir: string;
 let isolatedBundle: string;
+let lastUserAgent: string | undefined;
 
 beforeAll(async () => {
   bundleDir = mkdtempSync(join(tmpdir(), "scope-bundle-"));
   isolatedBundle = join(bundleDir, "scope.mjs");
   copyFileSync(BUNDLE_PATH, isolatedBundle);
   server = createServer((req, res) => {
+    lastUserAgent = req.headers["user-agent"];
     const url = new URL(req.url ?? "/", `http://localhost`);
     const response = MOCK_RESPONSES[url.pathname];
     if (response) {
@@ -112,6 +114,7 @@ describe("Bundle integration tests", () => {
     expect(stdout).toContain("req-test-001");
     expect(stdout).toContain("coder-acp-copilot");
     expect(stdout).toContain("done");
+    expect(lastUserAgent).toMatch(/^scope-cli\/\d+\.\d+\.\d+/);
   });
 
   it("criteria list fetches from mock API", async () => {
diff --git a/apps/cli/src/commands/codebase.ts b/apps/cli/src/commands/codebase.ts
index b703c89fa..736a53615 100644
--- a/apps/cli/src/commands/codebase.ts
+++ b/apps/cli/src/commands/codebase.ts
@@ -11,6 +11,7 @@ import { formatData, isMachineReadable } from "../utils/formatters.js";
 import type { DisplayField, OutputFormat } from "../utils/types.js";
 import { getDefaultApiUrl, normalizeUrl, withOutputOption, withProjectOption } from "../utils/shared.js";
 import { requireProjectId } from "../utils/config.js";
+import { CLI_USER_AGENT } from "../utils/api-client.js";
 
 type JsonDate = string | Date;
 type CodebaseApiDocument = Omit<CodebaseDocument, "createdAt" | "updatedAt" | "deletedAt"> & {
@@ -56,8 +57,14 @@ async function readError(response: Response): Promise<string> {
   return error.error ?? JSON.stringify(error);
 }
 
+async function fetchWithUserAgent(url: string, init?: RequestInit): Promise<Response> {
+  const headers = new Headers(init?.headers);
+  if (!headers.has("user-agent")) headers.set("user-agent", CLI_USER_AGENT);
+  return fetch(url, { ...init, headers });
+}
+
 async function fetchJson<T>(url: string, init?: RequestInit): Promise<T> {
-  const response = await fetch(url, init);
+  const response = await fetchWithUserAgent(url, init);
   if (!response.ok) {
     throw new Error(await readError(response));
   }
@@ -65,7 +72,7 @@ async function fetchJson<T>(url: string, init?: RequestInit): Promise<T> {
 }
 
 async function resolveCodebase(baseUrl: string, idOrSlug: string): Promise<CodebaseApiDocument> {
-  const directResponse = await fetch(`${baseUrl}/api/v1/codebases/${encodeURIComponent(idOrSlug)}`);
+  const directResponse = await fetchWithUserAgent(`${baseUrl}/api/v1/codebases/${encodeURIComponent(idOrSlug)}`);
   if (directResponse.ok) {
     return await directResponse.json() as CodebaseApiDocument;
   }
@@ -182,7 +189,7 @@ export function registerCodebaseCommands(program: Command): void {
         if (options.description) formData.append("description", options.description);
         const blob = new Blob([archiveBuffer], { type: "application/octet-stream" });
         formData.append("archive", blob, basename(resolvedPath));
-        const response = await fetch(`${baseUrl}/api/v1/codebases?projectId=${encodeURIComponent(projectId)}`, { method: "POST", body: formData });
+        const response = await fetchWithUserAgent(`${baseUrl}/api/v1/codebases?projectId=${encodeURIComponent(projectId)}`, { method: "POST", body: formData });
         if (!response.ok) {
           throw new Error(await readError(response));
         }
@@ -304,7 +311,7 @@ export function registerCodebaseCommands(program: Command): void {
       const blob = new Blob([archiveBuffer], { type: "application/octet-stream" });
       formData.append("archive", blob, basename(resolvedPath));
 
-      const response = await fetch(`${baseUrl}/api/v1/codebases/${encodeURIComponent(codebaseId(resolved))}/upload`, {
+      const response = await fetchWithUserAgent(`${baseUrl}/api/v1/codebases/${encodeURIComponent(codebaseId(resolved))}/upload`, {
         method: "POST",
         body: formData,
       });
@@ -340,7 +347,7 @@ export function registerCodebaseCommands(program: Command): void {
       const baseUrl = normalizeUrl(options.url);
       try {
         const resolved = await resolveCodebase(baseUrl, codebaseIdOrSlug);
-        const response = await fetch(`${baseUrl}/api/v1/codebases/${encodeURIComponent(codebaseId(resolved))}`, {
+        const response = await fetchWithUserAgent(`${baseUrl}/api/v1/codebases/${encodeURIComponent(codebaseId(resolved))}`, {
           method: "DELETE",
         });
         if (!response.ok) {
diff --git a/apps/cli/src/commands/report.ts b/apps/cli/src/commands/report.ts
index 1dce6f3b6..a16231969 100644
--- a/apps/cli/src/commands/report.ts
+++ b/apps/cli/src/commands/report.ts
@@ -9,7 +9,7 @@ import { formatData, isMachineReadable } from "../utils/formatters.js";
 import type { OutputFormat, DisplayField } from "../utils/types.js";
 import { normalizeUrl, withOutputOption, withProjectOption, getCliName, getDefaultApiUrl } from "../utils/shared.js";
 import { requireProjectId } from "../utils/config.js";
-import { apiFetch, getApiBasePath } from "../utils/api-client.js";
+import { apiFetch, CLI_USER_AGENT, getApiBasePath } from "../utils/api-client.js";
 
 export function registerReportCommands(program: Command): void {
 // ─── Report management ──────────────────────────────────────────────────────
@@ -52,7 +52,8 @@ report
       if (options.stream) {
         console.log(`\n${label('Streaming logs...')}\n`);
         const eventSource = new EventSource(
-          `${normalizeUrl(options.url)}${getApiBasePath()}/reports/${result.id}/logs?fromStart=true`
+          `${normalizeUrl(options.url)}${getApiBasePath()}/reports/${result.id}/logs?fromStart=true`,
+          { headers: { "User-Agent": CLI_USER_AGENT } },
         );
 
         eventSource.onmessage = (event: MessageEvent) => {
@@ -264,7 +265,8 @@ report
 
       const fromStartParam = options.fromStart ? "&fromStart=true" : "";
       const eventSource = new EventSource(
-        `${normalizeUrl(options.url)}${getApiBasePath()}/reports/${options.id}/logs?${fromStartParam}`
+        `${normalizeUrl(options.url)}${getApiBasePath()}/reports/${options.id}/logs?${fromStartParam}`,
+        { headers: { "User-Agent": CLI_USER_AGENT } },
       );
 
       eventSource.onmessage = (event: MessageEvent) => {
diff --git a/apps/cli/src/commands/run.ts b/apps/cli/src/commands/run.ts
index 4c2727699..1e2af551b 100644
--- a/apps/cli/src/commands/run.ts
+++ b/apps/cli/src/commands/run.ts
@@ -17,7 +17,7 @@ import type { OutputFormat, DisplayField } from "../utils/types.js";
 import { runGetAction } from "../run-get-action.js";
 import { normalizeUrl, printFollowUpCommands, withOutputOption, withProjectOption, getDefaultApiUrl } from "../utils/shared.js";
 import { requireProjectId } from "../utils/config.js";
-import { apiFetch, getApiBasePath } from "../utils/api-client.js";
+import { apiFetch, CLI_USER_AGENT, getApiBasePath } from "../utils/api-client.js";
 import { parseGatesOption } from "../utils/gates.js";
 import { buildResourceBindingSpecs, collectRepeatable } from "../utils/resources.js";
 
@@ -290,7 +290,9 @@ run
       // Stream logs
       console.log(`\n${banner('--- Streaming logs ---')}\n`);
 
-      const eventSource = new EventSource(`${normalizeUrl(url)}${getApiBasePath()}/requests/${result.id}/logs`);
+      const eventSource = new EventSource(`${normalizeUrl(url)}${getApiBasePath()}/requests/${result.id}/logs`, {
+        headers: { "User-Agent": CLI_USER_AGENT },
+      });
 
       eventSource.onmessage = (event) => {
         try {
@@ -439,7 +441,7 @@ run
       ? `${normalizeUrl(options.url)}${getApiBasePath()}/requests/${id}/logs?fromStart=true`
       : `${normalizeUrl(options.url)}${getApiBasePath()}/requests/${id}/logs`;
 
-    const eventSource = new EventSource(url);
+    const eventSource = new EventSource(url, { headers: { "User-Agent": CLI_USER_AGENT } });
 
     eventSource.onmessage = (event) => {
       try {
diff --git a/apps/cli/src/utils/api-client.test.ts b/apps/cli/src/utils/api-client.test.ts
index 7793f2922..038c333a2 100644
--- a/apps/cli/src/utils/api-client.test.ts
+++ b/apps/cli/src/utils/api-client.test.ts
@@ -4,6 +4,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import {
   ApiError,
+  CLI_USER_AGENT,
   apiFetch,
   DEFAULT_API_BASE_PATH,
   getApiBasePath,
@@ -60,6 +61,18 @@ describe("apiFetch URL handling", () => {
 
     expect(mock).toHaveBeenCalledTimes(1);
     expect(reqOf(mock).url).toBe("http://localhost:3100/api/v1/criteria");
+    expect(reqOf(mock).headers.get("user-agent")).toBe(CLI_USER_AGENT);
+  });
+
+  it("preserves a caller-supplied User-Agent", async () => {
+    const mock = vi.fn().mockResolvedValue(okJson());
+    vi.stubGlobal("fetch", mock);
+
+    await apiFetch("http://localhost:3100", "/criteria", {
+      headers: { "User-Agent": "scope-test-client/1" },
+    });
+
+    expect(reqOf(mock).headers.get("user-agent")).toBe("scope-test-client/1");
   });
 
   it("preserves query strings and adds a leading slash when missing", async () => {
diff --git a/apps/cli/src/utils/api-client.ts b/apps/cli/src/utils/api-client.ts
index 2ab2dba76..fe3dab734 100644
--- a/apps/cli/src/utils/api-client.ts
+++ b/apps/cli/src/utils/api-client.ts
@@ -31,6 +31,9 @@
 import ky, { type KyInstance, type BeforeRequestHook } from "ky";
 import { normalizeUrl } from "./shared.js";
 
+/** Identify CLI traffic separately from Portal and other API clients in request analytics. */
+export const CLI_USER_AGENT = `scope-cli/${process.env.SCOPE_CLI_VERSION ?? "0.1.0-dev"}`;
+
 /** Init accepted by {@link apiFetch}. Adds a couple of client-only knobs to `RequestInit`. */
 export interface ApiFetchInit extends RequestInit {
   /** Redact entire request/response log bodies when registering or validating credentials. */
@@ -478,6 +481,7 @@ export async function apiFetch(baseUrl: string | undefined, path: string, init?:
   const url = `${normalizeUrl(baseUrl)}${withProjectId(resolveApiPath(path), init?.projectId)}`;
 
   const headers = new Headers(init?.headers);
+  if (!headers.has("user-agent")) headers.set("user-agent", CLI_USER_AGENT);
   if (init?.skipAuth) headers.set(SKIP_AUTH_HEADER, "1");
 
   // Strip our client-only fields before handing the init to ky.
diff --git a/apps/cli/src/utils/update-check.test.ts b/apps/cli/src/utils/update-check.test.ts
index 32bc5dccf..d1c6ba1a3 100644
--- a/apps/cli/src/utils/update-check.test.ts
+++ b/apps/cli/src/utils/update-check.test.ts
@@ -31,7 +31,7 @@ describe("public CLI release lookup", () => {
     expect(await fetchLatestVersion()).toBe("1.2.3");
     expect(fetchMock).toHaveBeenCalledWith(RELEASES_URL, {
       signal: expect.any(AbortSignal),
-      headers: { Accept: "application/vnd.github.v3+json" },
+      headers: { Accept: "application/vnd.github.v3+json", "User-Agent": expect.stringMatching(/^scope-cli\//) },
     });
   });
 
diff --git a/apps/cli/src/utils/update-check.ts b/apps/cli/src/utils/update-check.ts
index b7f90e59b..40c0bbebc 100644
--- a/apps/cli/src/utils/update-check.ts
+++ b/apps/cli/src/utils/update-check.ts
@@ -13,6 +13,7 @@ import { execSync } from "node:child_process";
 import { homedir } from "node:os";
 import { join } from "node:path";
 import semver from "semver";
+import { CLI_USER_AGENT } from "./api-client.js";
 
 const UPDATE_CHECK_INTERVAL_MS = 60 * 60 * 1000; // 1 hour
 const CONFIG_DIR = join(homedir(), ".config", "scope");
@@ -107,6 +108,7 @@ export async function fetchLatestVersion(timeoutMs = 5000): Promise<string | und
   try {
     const headers: Record<string, string> = {
       Accept: "application/vnd.github.v3+json",
+      "User-Agent": CLI_USER_AGENT,
     };
     const token = process.env.GH_TOKEN || process.env.GITHUB_TOKEN;
     if (token) {
diff --git a/docs/architecture/cli-distribution.md b/docs/architecture/cli-distribution.md
index b2906b3ed..cea2d110b 100644
--- a/docs/architecture/cli-distribution.md
+++ b/docs/architecture/cli-distribution.md
@@ -70,6 +70,11 @@ guidance. `SCOPE_DEFAULT_API_URL` is no longer injected or read, and
 must also configure `SCOPE_API_URL` explicitly. Help, version, and CLI updates
 remain available without API configuration.
 
+CLI HTTP requests identify themselves with `User-Agent: scope-cli/<version>` so
+request analytics can distinguish them from Portal traffic. This includes Scope
+API calls, log streams, and the GitHub release update check. The bundled CLI uses
+its injected package version; source-mode development uses `0.1.0-dev`.
+
 ### esbuild plugins
 
 | Plugin | Purpose |