diff --git a/.changeset/chubby-adults-poke.md b/.changeset/chubby-adults-poke.md
new file mode 100644
index 000000000..f51701275
--- /dev/null
+++ b/.changeset/chubby-adults-poke.md
@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix select filters not working on table and cards blocks.
diff --git a/.changeset/preview-auth-content-path.md b/.changeset/preview-auth-content-path.md
new file mode 100644
index 000000000..3d8dd6f2a
--- /dev/null
+++ b/.changeset/preview-auth-content-path.md
@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Preserve the full site preview path and query parameters when redirecting users to log in.
diff --git a/.changeset/webmcp-published-docs.md b/.changeset/webmcp-published-docs.md
new file mode 100644
index 000000000..57454328c
--- /dev/null
+++ b/.changeset/webmcp-published-docs.md
@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Expose the site's MCP tools to browser agents through WebMCP when the MCP page action is enabled.
diff --git a/packages/gitbook/src/components/DocumentView/Table/TableSearch.tsx b/packages/gitbook/src/components/DocumentView/Table/TableSearch.tsx
index b8f6c5901..6104f3fd8 100644
--- a/packages/gitbook/src/components/DocumentView/Table/TableSearch.tsx
+++ b/packages/gitbook/src/components/DocumentView/Table/TableSearch.tsx
@@ -226,11 +226,10 @@ function SelectFilterDropdown(props: { column: TableSelectColumn }) {
                         key={option.value}
                         active={selected}
                         leadingIcon={selected ? 'check' : undefined}
-                        onSelect={(event) => {
-                            // Keep the menu open so several options can be toggled at once.
-                            event.preventDefault();
-                            toggleOption(column.id, option.value);
-                        }}
+                        // `closeOnClick={false}` keeps the menu open so several options can be
+                        // toggled at once.
+                        closeOnClick={false}
+                        onClick={() => toggleOption(column.id, option.value)}
                     >
                         {option.label || option.value}
                     </DropdownMenuItem>
diff --git a/packages/gitbook/src/components/SiteLayout/SiteLayout.tsx b/packages/gitbook/src/components/SiteLayout/SiteLayout.tsx
index 939543b6e..156373fa0 100644
--- a/packages/gitbook/src/components/SiteLayout/SiteLayout.tsx
+++ b/packages/gitbook/src/components/SiteLayout/SiteLayout.tsx
@@ -3,7 +3,7 @@ import Script from 'next/script';
 import React from 'react';
 import * as ReactDOM from 'react-dom';
 
-import { CustomizationDefaultThemeMode } from '@gitbook/api';
+import { CustomizationDefaultThemeMode, CustomizationPageActionType } from '@gitbook/api';
 
 import { AIContextProvider } from '../AI';
 import { RocketLoaderDetector } from './RocketLoaderDetector';
@@ -12,6 +12,7 @@ import { AdminToolbar } from '@/components/AdminToolbar';
 import { CookiesToast } from '@/components/Cookies';
 import { LoadIntegrations } from '@/components/Integrations';
 import { SpaceLayout } from '@/components/SpaceLayout';
+import { WebMCP } from '@/components/WebMCP/WebMCP';
 import type { VisitorAuthClaims } from '@/lib/adaptive';
 import { buildVersion } from '@/lib/build';
 import type { GitBookSiteContext } from '@/lib/context';
@@ -117,6 +118,9 @@ export async function SiteLayout(props: {
             </AIContextProvider>
 
             <LoadIntegrations />
+            {customization.pageActions.items.includes(CustomizationPageActionType.Mcp) ? (
+                <WebMCP mcpURL={context.linker.toPathInSite('~gitbook/mcp')} />
+            ) : null}
             {scripts.map(({ script }) =>
                 isDeferrableScript(script) ? (
                     <Script key={script} src={script} strategy="lazyOnload" />
diff --git a/packages/gitbook/src/components/WebMCP/WebMCP.tsx b/packages/gitbook/src/components/WebMCP/WebMCP.tsx
new file mode 100644
index 000000000..e9cae97ab
--- /dev/null
+++ b/packages/gitbook/src/components/WebMCP/WebMCP.tsx
@@ -0,0 +1,81 @@
+'use client';
+
+import * as React from 'react';
+
+// Subset of the WebMCP `ModelContext` interface (https://webmachinelearning.github.io/webmcp/).
+type ModelContext = {
+    registerTool: (
+        tool: {
+            name: string;
+            description: string;
+            inputSchema?: object;
+            execute: (input: object, options?: { signal?: AbortSignal }) => Promise<unknown>;
+        },
+        options?: { signal?: AbortSignal }
+    ) => Promise<void>;
+};
+
+/**
+ * Expose the site's MCP tools (`~gitbook/mcp`) to browser agents through WebMCP, so anything
+ * added to the server is automatically available to them. Renders nothing.
+ */
+export function WebMCP(props: { mcpURL: string }) {
+    const { mcpURL } = props;
+
+    React.useEffect(() => {
+        const modelContext = (document as { modelContext?: ModelContext }).modelContext;
+        if (!modelContext) {
+            return;
+        }
+
+        // Aborting unregisters the tools and discards a load still in flight.
+        const controller = new AbortController();
+        const { signal } = controller;
+
+        (async () => {
+            // The MCP SDK is imported lazily: only agentic browsers pay for it.
+            const [{ Client }, { StreamableHTTPClientTransport }] = await Promise.all([
+                import('@modelcontextprotocol/sdk/client/index.js'),
+                import('@modelcontextprotocol/sdk/client/streamableHttp.js'),
+            ]);
+            // Tagged so WebMCP calls are distinguishable in insights (the request URL is tracked).
+            const url = new URL(mcpURL, window.location.href);
+            url.searchParams.set('client', 'webmcp');
+            const client = new Client({ name: 'gitbook-webmcp', version: '1.0.0' });
+            await client.connect(new StreamableHTTPClientTransport(url));
+            const { tools } = await client.listTools();
+            if (signal.aborted) {
+                return;
+            }
+
+            for (const tool of tools) {
+                // Answer synthesis takes 20-30s and browser agents abort tool calls around 30s.
+                if (tool.name === 'askQuestion') {
+                    continue;
+                }
+                await modelContext.registerTool(
+                    {
+                        name: tool.name,
+                        description: tool.description ?? tool.name,
+                        inputSchema: tool.inputSchema,
+                        // The MCP result (`content` blocks, plus `isError` on failure) is passed through.
+                        execute: (input, options) =>
+                            client.callTool(
+                                { name: tool.name, arguments: input as Record<string, unknown> },
+                                undefined,
+                                { signal: options?.signal }
+                            ),
+                    },
+                    { signal }
+                );
+            }
+        })().catch((error) => {
+            // oxlint-disable-next-line no-console
+            console.warn('WebMCP: could not expose the site MCP tools', error);
+        });
+
+        return () => controller.abort();
+    }, [mcpURL]);
+
+    return null;
+}
diff --git a/packages/gitbook/src/lib/data/lookup.test.ts b/packages/gitbook/src/lib/data/lookup.test.ts
new file mode 100644
index 000000000..b450f875e
--- /dev/null
+++ b/packages/gitbook/src/lib/data/lookup.test.ts
@@ -0,0 +1,107 @@
+import { afterEach, describe, expect, it, spyOn } from 'bun:test';
+
+import type { PublishedSiteContentLookup } from '@gitbook/api';
+
+import { GITBOOK_PREVIEW_BASE_URL } from '../env';
+import * as api from './api';
+import { lookupPublishedContentByUrl } from './lookup';
+
+describe('preview auth redirects', () => {
+    afterEach(() => {
+        apiClientSpy?.mockRestore();
+    });
+
+    let apiClientSpy: ReturnType<typeof spyOn> | undefined;
+
+    it.each([
+        'site_foo/~/changes/66',
+        'site_foo/~/revisions/revision_123',
+        'site_foo',
+        'site_foo/~/changes/66/hello%20world?theme=dark&value=a%26b&value=c%2Bd',
+        'site_foo/~/revisions/revision_123/guide?next=%2Fsome%3Fpath%3D1&empty=',
+        'site_foo?theme=dark',
+    ])('preserves the requested URL for %s', async (path) => {
+        const requestURL = new URL(path, GITBOOK_PREVIEW_BASE_URL);
+        const authURL = new URL('https://app.gitbook.com/o/org_foo/sites/site_foo/preview/auth');
+        apiClientSpy = spyOn(api, 'apiClient').mockReturnValue({
+            urls: {
+                async resolvePublishedContentByUrl({ url }: { url: string }) {
+                    // The API uses the lookup URL as the return target for preview authentication.
+                    const redirect = new URL(authURL);
+                    redirect.searchParams.set('redirect', url);
+                    return { data: { target: 'application', redirect: redirect.toString() } };
+                },
+            },
+        } as ReturnType<typeof api.apiClient>);
+
+        const result = await lookupPublishedContentByUrl({
+            url: requestURL.toString(),
+            apiToken: null,
+            redirectOnError: false,
+            visitorPayload: {},
+        });
+
+        expect(result.error).toBeUndefined();
+        if (!result.data || !('redirect' in result.data)) {
+            throw new Error('Expected an authentication redirect');
+        }
+        const redirect = new URL(result.data.redirect);
+        expect(redirect.origin + redirect.pathname).toBe(authURL.toString());
+        expect(redirect.searchParams.get('redirect')).toBe(requestURL.toString());
+    });
+
+    it.each([
+        {
+            name: 'non-preview application redirects',
+            requestURL: 'https://docs.example.com/~/changes/66',
+            target: 'application',
+            redirect: 'https://app.gitbook.com/o/org_foo/sites/site_foo',
+            expectedRedirect: 'https://app.gitbook.com/o/org_foo/sites/site_foo',
+        },
+        {
+            name: 'preview content redirects with a remaining page path',
+            requestURL: new URL(
+                'site_foo/~/changes/66/hello%20world',
+                GITBOOK_PREVIEW_BASE_URL
+            ).toString(),
+            target: 'content',
+            redirect: 'https://docs.example.com/section?theme=dark',
+            expectedRedirect: 'https://docs.example.com/section/hello%20world?theme=dark',
+        },
+        {
+            name: 'preview external redirects with a remaining page path',
+            requestURL: new URL(
+                'site_foo/~/revisions/revision_123/hello%20world',
+                GITBOOK_PREVIEW_BASE_URL
+            ).toString(),
+            target: 'external',
+            redirect: 'https://auth.example.com/login?location=%2Fsection&state=keep',
+            expectedRedirect:
+                'https://auth.example.com/login?location=%2Fsection%2Fhello%2520world&state=keep',
+        },
+    ] as const)(
+        'preserves handling of $name',
+        async ({ requestURL, target, redirect, expectedRedirect }) => {
+            const data: PublishedSiteContentLookup =
+                target === 'external'
+                    ? { target, redirect, site: 'site_foo' }
+                    : { target, redirect };
+            apiClientSpy = spyOn(api, 'apiClient').mockReturnValue({
+                urls: {
+                    async resolvePublishedContentByUrl() {
+                        return { data };
+                    },
+                },
+            } as unknown as ReturnType<typeof api.apiClient>);
+
+            const result = await lookupPublishedContentByUrl({
+                url: requestURL,
+                apiToken: null,
+                redirectOnError: false,
+                visitorPayload: {},
+            });
+
+            expect(result).toEqual({ data: { ...data, redirect: expectedRedirect } });
+        }
+    );
+});
diff --git a/packages/gitbook/src/lib/data/lookup.ts b/packages/gitbook/src/lib/data/lookup.ts
index b512bcd31..081d49162 100644
--- a/packages/gitbook/src/lib/data/lookup.ts
+++ b/packages/gitbook/src/lib/data/lookup.ts
@@ -8,6 +8,7 @@ import { isAPITokenExpired } from '@/lib/api-token';
 import { race, tryCatch } from '@/lib/async';
 import { getLogger } from '@/lib/logger';
 import { joinPath, joinPathWithBaseURL } from '@/lib/paths';
+import { isPreviewRequest } from '@/lib/preview';
 import { trace } from '@/lib/tracing';
 
 type ResolveBody = Parameters<GitBookAPI['urls']['resolvePublishedContentByUrl']>[0];
@@ -91,6 +92,13 @@ export async function lookupPublishedContentByUrl(
 
         if ('redirect' in data) {
             if (alternative.primary) {
+                if (data.target === 'application' && isPreviewRequest(lookupURL)) {
+                    // The cached lookup omits content selectors and query params needed after login.
+                    const redirect = new URL(data.redirect);
+                    redirect.searchParams.set('redirect', lookupURL.toString());
+                    return { data: { ...data, redirect: redirect.toString() } };
+                }
+
                 // Append the path to the redirect URL
                 // because we might have matched a shorter path and the redirect is relative to it
                 if (alternative.extraPath) {