The Plain Fetch viewer

In short

The viewer requests a URL the way a plain-fetch agent does: no JavaScript, one request for HTML, one for markdown, one for llms.txt and one for a path that should not exist. It shows the initial HTML on the left, the readable text on the right, and seven flags underneath.

Pre-loaded with www.wikipedia.org, read 4 November 2026. Type any public URL to run your own.

GET https://tailscale.com/ answered 200 with text/html, 282 KB, read 9 November 2026, 14:06 UTC.

Permalink: /viewer/?url=https://tailscale.com/

The page answers a plain fetch: 3 of 6 checks found.

Initial HTML what a plain fetch receives

<!DOCTYPE html>
<html data-dpl-id="dpl_9wYLoXJDCMtPnPND2X3n6Yhg7GoR" lang="en" data-scroll-behavior="smooth" class="sCjy7q_variable skerTq_variable">
<head>
<meta charSet="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
[... 25 more head elements folded ...]
<title>Tailscale | Secure Connectivity for AI, IoT &amp; Multi-Cloud
</title>
<meta name="description" content="The connectivity platform for devs, IT, and security teams. Zero Trust identity-based access that deploys in minutes and scales to every resource. Start free."/>
<link rel="canonical" href="https://tailscale.com"/>
[... 11 more head elements folded ...]
</head>
<body class="has-data-[body-bg=white]:bg-white bg-neutral-100">
<div hidden=""><!--$--><!--/$-->
</div><!--$!--><template data-dgst=""></template><!--/$--><!--$!--><template data-dgst=""></template><!--/$-->
<div class="sticky top-0 z-[20000]">
<div class="xlsmall:!p-6 min-h-54 bg-neutral-800 text-mono-xs z-[20000] flex w-full p-16 text-white dark:bg-white">
<div class="mx-auto w-full max-w-[1360px] px-24 md:max-w-[1440px] md:px-64 xlsmall:!justify-between flex items-center justify-center">
<div><a class="underline-offset-3 group flex flex-wrap items-center justify-center gap-x-24 gap-y-8 text-pretty text-center leading-[1.5] text-white sm:text-left dark:text-neutral-950" href="https://tailscale.com/events/reinvent26">
<div class="flex items-center gap-x-8">
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" style="color:var(--color-orange-300)" aria-hidden="true" class="hidden sm:block">[... 1,006 characters folded ...]
</svg>Visit us at ReInvent 
</div><span class="text-neutral-100/70 underline group-hover:no-underline dark:text-neutral-950/60">How to find us →</span></a>
</div>
<nav class="xlsmall:block max-xlsmall:hidden">
<ul class="flex gap-24">
<li><a class="text-neutral-100/70 text-mono-xs block py-14 hover:underline dark:text-neutral-950/60" href="/blog">Blog</a>
</li>
<li><a class="text-neutral-100/70 text-mono-xs block py-14 hover:underline dark:text-neutral-950/60" href="/docs">Docs</a>
</li>
<li><a class="text-neutral-100/70 text-mono-xs block py-14 hover:underline dark:text-neutral-950/60" href="/download">Download</a>
</li>
<li><a class="text-neutral-100/70 text-mono-xs block py-14 hover:underline dark:text-neutral-950/60" href="/contact/sales">Contact sales</a>
</li>
</ul>
</nav>
</div>
</div>
<header class="bg-white transition-colors duration-300">
<div class="mx-auto w-full max-w-[1360px] px-24 md:max-w-[1440px] md:px-64 h-75 flex items-center justify-between gap-4"><a class="text-button-md hover:text-neutral-950/80 dark:hover:text-neutral-100/80 inline-flex items-center gap-x-4 px-0 py-4 font-medium underline underline-offset-4 transition-all duration-200 dark:text-white text-neutral-950 flex-row" href="/"><span>
<svg width="145" height="28" viewBox="0 0 145 28" fill="none" xmlns="http://www.w3.org/2000/svg">[... 5,218 characters folded ...]
</svg></span></a>
<div class="xlsmall:justify-between max-xlsmall:justify-end flex w-full items-center gap-3">
<nav class="website-nav xlsmall:block max-xlsmall:hidden relative m-auto">
<ul class="flex gap-x-4">
<li><button class="text-body-sm hover:bg-neutral-300 flex items-center gap-4 rounded-md px-12 py-10 font-medium">Platform
<svg width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg">[... 373 characters folded ...]
</svg></button>
<div class="z-100 pointer-events-none absolute left-1/2 top-full mt-12 -translate-x-1/2 pt-16 opacity-0">
<div class="shadow-8 border-neutral-300 overflow-hidden rounded-2xl border">
<div class="shadow-2 border-neutral-300 grid auto-cols-[268px] grid-flow-col gap-16 border-b bg-white p-32">
<div class="flex flex-col gap-16">
<div class="flex items-center gap-10 px-12">
<p class="text-mono-xs text-neutral-800/80 whitespace-nowrap">Meet Tailscale
</p><hr aria-hidden="true" role="separator" class="bg-neutral-300 dark:bg-neutral-100/20 h-px w-full border-none"/>
</div>
<ul class="flex flex-col gap-4">
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;How Tailscale Works&quot;}" href="/blog/how-tailscale-works">How Tailscale Works</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;WireGuard® for Enterprises&quot;}" href="/wireguard-vpn">WireGuard® for Enterprises</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Features&quot;}" href="/features">Features</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Integrations&quot;}" href="/integrations">Integrations</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Docs&quot;}" href="/docs">Docs</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Download&quot;}" href="/download">Download</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Compare Tailscale&quot;}" href="/compare">Compare Tailscale</a>
</li>
</ul>
</div>
<div class="flex flex-col gap-16">
<div class="flex items-center gap-10 px-12">
<p class="text-mono-xs text-neutral-800/80 whitespace-nowrap">Products
</p><hr aria-hidden="true" role="separator" class="bg-neutral-300 dark:bg-neutral-100/20 h-px w-full border-none"/>
</div>
<ul class="flex flex-col gap-4">
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Business VPN&quot;}" href="/use-cases/business-vpn">Business VPN</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Tailscale PAM&quot;}" href="/use-cases/pam">Tailscale PAM</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;CI/CD Connectivity&quot;}" href="/use-cases/ci-cd">CI/CD Connectivity</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Secure Access to AI&quot;}" href="/use-cases/securing-ai">Secure Access to AI</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Workload Connectivity&quot;}" href="/use-cases/workload-connectivity">Workload Connectivity</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Edge &amp; IoT&quot;}" href="/use-cases/edge-iot">Edge &amp; IoT</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Homelab&quot;}" href="/use-cases/homelab">Homelab</a>
</li>
</ul>
</div><a class="shadow-2 flex flex-col self-stretch overflow-hidden rounded-md border border-neutral-300 bg-neutral-200" href="https://tailscale.com/use-cases/securing-ai">
<div class="flex flex-1 items-center">
<div class="relative flex h-auto w-full items-center"><img alt="aperture dashboard" loading="lazy" width="798" height="1026" decoding="async" data-nimg="1" class="object-cover transition-opacity duration-300 overflow-hidden border border-neutral-300 h-full w-full opacity-0  [... 689 characters folded ...]>
</div>
</div>
<div class="bg-neutral-100 px-32 pb-32">
<p class="text-mono-sm text-neutral-800 mb-4">Aperture by Tailscale
</p>
<p class="text-body-md text-neutral-800/80">Unified AI governance for AI agents and users. 
</p>
</div></a>
</div>
<div class="bg-neutral-100 p-32">
<div class="flex items-center justify-between">
<div class="flex flex-col gap-4">
<p class="text-mono-xs text-neutral-800">Bring Tailscale to work
</p>
<p class="text-body-md text-neutral-800/80">See how Tailscale fits the systems your team already runs.
</p>
</div><a type="button" class="text-button-md inline-flex h-36 items-center justify-center gap-4 whitespace-nowrap rounded-md px-12 py-8 transition-[color,background-color,border-color,box-shadow] duration-200 disabled:cursor-n [... 348 characters folded ...]>Make the case</a>
</div>
</div>
</div>
</div>
</li>
<li><button class="text-body-sm hover:bg-neutral-300 flex items-center gap-4 rounded-md px-12 py-10 font-medium">Solutions
<svg width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg">[... 373 characters folded ...]
</svg></button>
<div class="z-100 pointer-events-none absolute left-1/2 top-full mt-12 -translate-x-1/2 pt-16 opacity-0">
<div class="shadow-8 border-neutral-300 overflow-hidden rounded-2xl border">
<div class="shadow-2 border-neutral-300 grid auto-cols-[268px] grid-flow-col gap-16 border-b bg-white p-32">
<div class="flex flex-col gap-16">
<div class="flex items-center gap-10 px-12">
<p class="text-mono-xs text-neutral-800/80 whitespace-nowrap">Solutions
</p><hr aria-hidden="true" role="separator" class="bg-neutral-300 dark:bg-neutral-100/20 h-px w-full border-none"/>
</div>
<ul class="flex flex-col gap-4">
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Cloud Connectivity&quot;}" href="/use-cases/cloud-connectivity">Cloud Connectivity</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Infrastructure Access&quot;}" href="/use-cases/infrastructure-access">Infrastructure Access</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Zero Trust Networking&quot;}" href="/use-cases/zero-trust-networking">Zero Trust Networking</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Remote Access&quot;}" href="/use-cases/remote-access">Remote Access</a>
</li>
<li><a class="text-body-md text-neutral-800 hover:bg-neutral-300 block rounded-md p-12 font-medium" data-track="Link Clicked" data-track-properties="{&quot;label&quot;: &quot;Kubernetes Networking&quot;}" href="/use-cases/kubernetes">Kubernetes Networking</a>

Shown with 147 long blocks (scripts, styles, long tags) folded into a marker that says how many characters they hide; line breaks added before block tags because the source is minified; the pane stops after the first 200 words; the page is 282 KB.

Reading view the text a plain-fetch client can extract

title: Tailscale | Secure Connectivity for AI, IoT & Multi-Cloud

The best secure connectivity platform for the AI era

Visit us at ReInvent How to find us → Blog Docs Download Contact sales Platform Meet Tailscale How Tailscale Works WireGuard® for Enterprises Features Integrations Docs Download Compare Tailscale Products Business VPN Tailscale PAM CI/CD Connectivity Secure Access to AI Workload Connectivity Edge & IoT Homelab Aperture by Tailscale Unified AI governance for AI agents and users. Bring Tailscale to work See how Tailscale fits the systems your team already runs. Make the case Solutions Solutions Cloud Connectivity Infrastructure Access Zero Trust Networking Remote Access Kubernetes Networking Secure SaaS Secure AI Agent Connectivity Customers Customer Stories Instacart Cribl Mercury All Customer Stories Community Join the Community About Community Tailscale Insiders Community Projects Bring Tailscale to Work Events Events Webinars TailscaleUp Learn more Docs Blog Changelog Press Bring Tailscale to work Start with your own devices. Bring the same simplicity to your team. Make the case Partnerships Partner Opportunities Become a Partner Our Partners Integrations Contact Partnerships Team Pricing Login Get started - it’s free! Blog Docs Download Contact sales Platform Meet Tailscale How Tailscale Works WireGuard® for Enterprises Features Integrations Docs Download Compare Tailscale Products Business VPN Tailscale PAM CI/CD Connectivity Secure Access to AI Workload Connectivity Edge & IoT

1373 more words follow in the initial HTML.

3 found, 2 missing, 2 notes, from 7 checks run

H1Found
200 wordsFound
llms.txtNote
MarkdownMissing
Missing pathFound
JSON-LDMissing
OpenAPINote

What a plain fetch found on tailscale.com
Check	Result	Detail
H1 in the initial HTML	Found one H1	First H1: The best secure connectivity platform for the AI era
First 200 words in the initial HTML	Found 200 of 200 words	The initial HTML carries 1573 words of visible text; the first 200 are marked in the left pane.
llms.txt present and linked	Note present, not linked	415 bytes, 1 links. Structure grade A (6 of 6). Nothing on the home page points to it. Ora's lab found 86 percent of llms.txt fetches arrived through a link.
Markdown on request	Missing 200 text/html	Accept: text/markdown returned 200 with text/html; charset=utf-8. The server ignores the header.
Status of a made-up path	Found 404	/agent-ready-html-missing-path-check returned 404: a real status code for a missing page.
JSON-LD types	Missing none	No JSON-LD block on the home page. Ora's lab found it made no difference when the answer was already in the HTML; Google says it is not needed for AI features.
OpenAPI link	Note none on the home page	No OpenAPI link on the home page. It matters only for a site that ships an API.

Run the full check

The viewer read one page with four requests. The full check we recommend next is Ora's scan. Its Access layer runs 42 checks worth 30 of its 100 points, among them content without JavaScript, bot detection, llms.txt, markdown on request, JSON-LD and the sitemap (Ora's check catalogue, contract 1.38.0, read 5 November 2026). Open Ora's report for tailscale.com.

Limits: Ora reads public URLs only, says two runs of one scan land within a couple of points without publishing repeat-scan data, and keeps the product that fixes what it finds behind a waitlist. Cloudflare's scanner at isitagentready.com is a quick free alternative, and Mintlify's score covers documentation.

What the viewer does

It sends four plain GET requests with the user agent Mozilla/5.0 (compatible; agent-readiness-crawl/1.0): the URL itself, the same URL with Accept: text/markdown, /llms.txt on the same host, and a made-up path at the root. It runs no JavaScript. The left pane is the first bytes of the HTML as text, with long scripts and styles folded into a marker that says how many characters they hide. The H1 and the first 200 words of visible text are marked in both panes. The flags under the panes say what the four responses added up to.

Limits

Ten seconds for all four requests together, 1.5 MB read from the home page, at most five redirects, each one checked again.
http and https only, default ports only. Private, local and internal addresses and names are refused.
Ten runs per address per minute. The counter lives in memory on the edge function, so it is per instance rather than global. Past ten you get a 429 with a Retry-After header.
Results are cached for 24 hours by the response headers. Nothing is written to a database: the viewer keeps the first 200 words and the extracted fields for the length of the request and keeps no page body beyond that.

What it does not tell you

A plain fetch from this server is not a real agent. Bot protection weighs the source address more than the user agent, so a page that answers 200 here can still refuse an agent, and the reverse. Ora's lab found (2026-10-19) that returning 403 to agent user agents and hiding the answer in JavaScript were the only two of 19 configurations that stopped retrieval; the viewer can see the second, and can only hint at the first. The initial HTML reference covers both. The server logs and the published crawler address ranges settle the first.

The seven flags

H1 in the initial HTML: Whether the HTML the server sends already contains an H1. It is the cheapest sign that the page does not depend on scripts to say what it is.
First 200 words in the initial HTML: Whether at least 200 words of visible text arrive in the initial HTML. Under 40 words with an app root element is flagged as a JavaScript shell.
llms.txt present and linked: Whether /llms.txt answers with a plain-text file, whether the home page links it (an anchor, a link element or a Link header), and the structure grade the index uses.
Markdown on request: Whether a request with Accept: text/markdown comes back as text/markdown. Cloudflare Radar found 3.9 percent of scanned top sites passing this at its April 2026 launch.
Status of a made-up path: Whether a path that should not exist returns 404 or 410. A 200 is a soft 404 and reads as a live page.
JSON-LD types: The schema.org types found in JSON-LD blocks on the page. Ora's lab found JSON-LD made no difference when the answer was already in the HTML.
OpenAPI link: Whether the page links an OpenAPI file, by an anchor or a service-desc link relation. It matters only for a site that ships an API.

Sources

Ora: AgentReady launch post (Ora's lab findings) https://ora.ai/blog/agentready-launch, read 4 November 2026
Ora check catalogue, contract 1.38.0 (132 checks, 42 in the Access layer) https://ora.ai/api/checks, read 5 November 2026
Ora home page (the fixing product is behind a waitlist) https://ora.ai/, read 5 November 2026
Ora: Introducing Deep Scan (repeat scans) https://ora.ai/blog/introducing-deep-scan, read 5 November 2026
Ora llms.txt (public URLs only) https://ora.ai/llms.txt, read 5 November 2026
Vercel: Make your site readable by AI agents https://vercel.com/kb/guide/make-your-site-readable-by-ai-agents, read 4 November 2026
llms.txt proposal (llmstxt.org) https://llmstxt.org/, read 4 November 2026

Last reviewed 5 November 2026