diff --git a/packages/gitbook/scripts/test-cache-revalidation.ts b/packages/gitbook/scripts/test-cache-revalidation.ts
new file mode 100644
index 000000000..d0152291a
--- /dev/null
+++ b/packages/gitbook/scripts/test-cache-revalidation.ts
@@ -0,0 +1,205 @@
+/**
+ * Usage:
+ *   bun packages/gitbook/scripts/test-cache-revalidation.ts benchmark
+ *   bun packages/gitbook/scripts/test-cache-revalidation.ts revalidate
+ */
+
+import { createHmac } from 'node:crypto';
+
+// Edit this section for the local site under test. `bun dev` exposes published
+// sites at /url/<published-site-host>/<path>.
+const PAGE_URLS = [
+    'http://localhost:3000/url/example.gitbook.io/docs',
+    'http://localhost:3000/url/example.gitbook.io/docs/getting-started',
+];
+
+// The revalidation route must use the same /url/<published-site-host>/ prefix.
+// Leave REVALIDATE_SECRET empty when the deployment does not set GITBOOK_SECRET.
+const REVALIDATE_URL = 'http://localhost:3000/url/example.gitbook.io/~gitbook/revalidate';
+const REVALIDATE_SECRET = '';
+const REVALIDATE_BODY = '{"tags":["space:YOUR_SPACE_ID"]}';
+
+// Next sets x-nextjs-cache to HIT or MISS. Change this when testing through a
+// proxy that exposes the result under a different header.
+const CACHE_STATUS_HEADER = 'x-nextjs-cache';
+const BENCHMARK_RUNS = 3;
+const WARMUP_REQUESTS = 2;
+const WAIT_AFTER_REVALIDATION_MS = 1_000;
+
+type RequestResult = {
+    cacheStatus: string | null;
+    status: number;
+    totalMs: number;
+    ttfbMs: number;
+    url: string;
+};
+
+function printTableHeader() {
+    console.log(
+        `${'request'.padEnd(13)} ${'HTTP'.padEnd(4)} ${CACHE_STATUS_HEADER.padEnd(16)} ${'TTFB / total'.padEnd(22)} URL`
+    );
+}
+
+function printResult(label: string, result: RequestResult) {
+    const cacheStatus = result.cacheStatus ?? '<missing>';
+    const timings = `${result.ttfbMs.toFixed(1)} / ${result.totalMs.toFixed(1)} ms`;
+    console.log(
+        `${label.padEnd(13)} ${String(result.status).padEnd(4)} ${cacheStatus.padEnd(16)} ${timings.padEnd(22)} ${result.url}`
+    );
+}
+
+async function requestPage(url: string): Promise<RequestResult> {
+    const start = performance.now();
+    const response = await fetch(url);
+    const ttfbMs = performance.now() - start;
+
+    // Consume the response body so totalMs measures the entire transfer.
+    await response.arrayBuffer();
+
+    return {
+        cacheStatus: response.headers.get(CACHE_STATUS_HEADER),
+        status: response.status,
+        totalMs: performance.now() - start,
+        ttfbMs,
+        url: response.url,
+    };
+}
+
+function isSuccessful(result: RequestResult) {
+    return result.status >= 200 && result.status < 400;
+}
+
+async function benchmark(): Promise<number> {
+    let failures = 0;
+    printTableHeader();
+
+    for (let run = 1; run <= BENCHMARK_RUNS; run += 1) {
+        for (const url of PAGE_URLS) {
+            try {
+                const result = await requestPage(url);
+                printResult(`benchmark-${run}`, result);
+                if (!isSuccessful(result)) {
+                    failures += 1;
+                }
+            } catch (error) {
+                console.error(`benchmark-${run} ERR ${url}: ${String(error)}`);
+                failures += 1;
+            }
+        }
+    }
+
+    return failures;
+}
+
+function validateRevalidationConfig() {
+    if (
+        REVALIDATE_URL.includes('example.gitbook.io') ||
+        REVALIDATE_BODY.includes('YOUR_') ||
+        PAGE_URLS.some((url) => url.includes('example.gitbook.io'))
+    ) {
+        throw new Error(
+            'Set PAGE_URLS, REVALIDATE_URL, and REVALIDATE_BODY before revalidate mode.'
+        );
+    }
+}
+
+function createSignature() {
+    if (!REVALIDATE_SECRET) {
+        return undefined;
+    }
+
+    return createHmac('sha256', REVALIDATE_SECRET).update(REVALIDATE_BODY).digest('hex');
+}
+
+async function revalidate(): Promise<number> {
+    validateRevalidationConfig();
+    let failures = 0;
+
+    console.log(`Warming each page (${WARMUP_REQUESTS} request(s) each)...`);
+    printTableHeader();
+    for (let run = 1; run <= WARMUP_REQUESTS; run += 1) {
+        for (const url of PAGE_URLS) {
+            try {
+                const result = await requestPage(url);
+                printResult(`warmup-${run}`, result);
+                if (!isSuccessful(result)) {
+                    failures += 1;
+                }
+            } catch (error) {
+                console.error(`warmup-${run} ERR ${url}: ${String(error)}`);
+                failures += 1;
+            }
+        }
+    }
+
+    const headers = new Headers({ 'content-type': 'application/json' });
+    const signature = createSignature();
+    if (signature) {
+        headers.set('x-gitbook-signature', signature);
+    }
+
+    console.log(`Revalidating ${REVALIDATE_BODY}...`);
+    const revalidationResponse = await fetch(REVALIDATE_URL, {
+        body: REVALIDATE_BODY,
+        headers,
+        method: 'POST',
+    });
+    const revalidationResponseBody = await revalidationResponse.text();
+    if (!revalidationResponse.ok) {
+        throw new Error(
+            `Revalidation failed with ${revalidationResponse.status}: ${revalidationResponseBody}`
+        );
+    }
+    console.log(revalidationResponseBody);
+
+    await Bun.sleep(WAIT_AFTER_REVALIDATION_MS);
+
+    console.log('Checking that the next response is a MISS...');
+    printTableHeader();
+    for (const url of PAGE_URLS) {
+        try {
+            const result = await requestPage(url);
+            printResult('revalidated', result);
+            if (!isSuccessful(result) || result.cacheStatus?.toUpperCase() !== 'MISS') {
+                failures += 1;
+            }
+        } catch (error) {
+            console.error(`revalidated ERR ${url}: ${String(error)}`);
+            failures += 1;
+        }
+    }
+
+    return failures;
+}
+
+async function main() {
+    const mode = process.argv[2] ?? 'benchmark';
+    let failures: number;
+
+    try {
+        switch (mode) {
+            case 'benchmark':
+                failures = await benchmark();
+                break;
+            case 'revalidate':
+                failures = await revalidate();
+                break;
+            default:
+                throw new Error(`Usage: bun ${process.argv[1]} {benchmark|revalidate}`);
+        }
+    } catch (error) {
+        console.error(String(error));
+        return 1;
+    }
+
+    if (failures > 0) {
+        console.error(`${failures} request(s) failed.`);
+        return 1;
+    }
+
+    return 0;
+}
+
+void main().then((exitCode) => {
+    process.exitCode = exitCode;
+});