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.
The page answers a plain fetch: 4 of 6 checks found.
Initial HTML what a plain fetch receives
<!doctype html>
<html lang="en-US" class="no-js" itemscope itemtype="http://schema.org/Article">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
[... 6 more head elements folded ...]
<meta name='robots' content='index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1' />
<link rel="alternate" href="https://pubmatic.com/" hreflang="en" />
<link rel="alternate" href="https://pubmatic.co.jp/" hreflang="ja" />
[... 1 more head element folded ...]
<title>AI-Powered Ad Tech for Measurable Performance | PubMatic</title>
<meta name="description" content="Drive measurable advertising performance with PubMatic's AI-powered, agentic platform — built for buyers, publishers, and commerce media across CTV and mobile." />
<link rel="canonical" href="https://pubmatic.com/" />
[... 21 more head elements folded ...]
<link rel="alternate" title="oEmbed (JSON)" type="application/json+oembed" href="https://pubmatic.com/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fpubmatic.com%2F&lang=en" />
<link rel="alternate" title="oEmbed (XML)" type="text/xml+oembed" href="https://pubmatic.com/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fpubmatic.com%2F&format=xml&lang=en" />
[... 22 more head elements folded ...]
<link rel="alternate" title="JSON" type="application/json" href="https://pubmatic.com/wp-json/wp/v2/pages/56675" />
<meta name="generator" content="Site Kit by Google 1.188.0" />
[... 22 more head elements folded ...]
</head>
<body class="home wp-singular page-template page-template-page-home page-template-page-home-php page page-id-56675 wp-theme-pubmatic">
<!-- [... 328 characters folded ...] -->
<!-- header -->
<header class="transparent">
<div class="brand">
<div class="content-middle">
<a href="https://pubmatic.com/">
<img alt="Pubmatic logo" class="logo" src="https://pubmatic.com/wp-content/themes/pubmatic/imgs/logo-black.svg" />
<img alt="Pubmatic logo" class="rev-logo" src="https://pubmatic.com/wp-content/themes/pubmatic/imgs/logo-white.svg" />
</a>
</div>
</div>
<div class="toolbar hidden-xs hidden-sm pull-right">
<a href="/contact-us/" class="login text-center pull-right" >
<!-- translation -->
Contact Us </a>
<div class="search hidden">
<div class="content-middle">
<form method="get" action="https://pubmatic.com/" autocomplete="off" class="pubm-search-form" aria-label="Site search">
<a href="" class="close-icon">
<svg width="601" height="601" viewBox="0 0 601 601" fill="none" xmlns="http://www.w3.org/2000/svg">[... 568 characters folded ...]</svg>
</a>
<div class="form-group">
<label for="search-input" class="visually-hidden">What can we help you find?</label>
<input type="text"
name="s"
id="search-input"
placeholder="What can we help you find?"
value=""
class="form-control input-lg" />
<svg width="668" height="668" viewBox="0 0 668 668" fill="none" xmlns="http://www.w3.org/2000/svg">[... 272 characters folded ...]</svg>
<input type="submit" value="Search">
</div>
<div class="pubm-search-form__quick-links">
<small>TRENDING</small>
<ul class="pubm-search-form__initial-list">
<li>
<a href="/products/activate/" target="">
Activate </a>
</li>
<li>
<a href="/solutions/agents/" target="">
Agentic </a>
</li>
<li>
<a href="/auction-packages/" target="">
Auction Packages </a>
</li>
<li>
<a href="/solutions/ctv-ott/" target="">
CTV </a>
</li>
</ul>
<ul class="pubm-search-form__typeahead-list">
<li>
<a href="/?s=Activate" class="pubm-search-form__option" data-value="Activate">
Activate </a>
</li>
<li>
<a href="/?s=Agentic" class="pubm-search-form__option" data-value="Agentic">
Agentic </a>
</li>
<li>
<a href="/?s=Auction+Package" class="pubm-search-form__option" data-value="Auction Package">
Auction Package </a>
</li>
<li>
<a href="/?s=CTV" class="pubm-search-form__option" data-value="CTV">
CTV </a>
</li>
<li>
<a href="/?s=OpenWrap" class="pubm-search-form__option" data-value="OpenWrap">
OpenWrap </a>
</li>
<li>
<a href="/?s=OpenWrap+SDK" class="pubm-search-form__option" data-value="OpenWrap SDK">
OpenWrap SDK </a>
</li>
<li>
<a href="/?s=Live+Sports" class="pubm-search-form__option" data-value="Live Sports">
Live Sports </a>
</li>
<li>
<a href="/?s=Political" class="pubm-search-form__option" data-value="Political">
Political </a>
</li>
<li>
<a href="/?s=Creative+Innovation+Suite" class="pubm-search-form__option" data-value="Creative Innovation Suite">
Creative Innovation Suite </a>
</li>
<li>
<a href="/?s=Programmatic" class="pubm-search-form__option" data-value="Programmatic">
Programmatic </a>
</li>
<li>
<a href="/?s=Mobile" class="pubm-search-form__option" data-value="Mobile">
Mobile </a>
</li>
<li>
<a href="/?s=AI+Hub" class="pubm-search-form__option" data-value="AI Hub">
AI Hub </a>
</li>
<li>
<a href="/?s=Video+Hub" class="pubm-search-form__option" data-value="Video Hub">
Video Hub </a>
Shown with 34 long blocks (scripts, styles, long tags) folded into a marker that says how many characters they hide; the pane stops after the first 200 words; the page is 125 KB.
Reading view the text a plain-fetch client can extract
title: AI-Powered Ad Tech for Measurable Performance | PubMatic
AI-POWERED ADVERTISING PERFORMANCE FOR PREMIUM DIGITAL MEDIA
Contact Us What can we help you find? TRENDING Activate Agentic Auction Packages CTV Activate Agentic Auction Package CTV OpenWrap OpenWrap SDK Live Sports Political Creative Innovation Suite Programmatic Mobile AI Hub Video Hub Resource Hub Executive Dialogues Voters Commerce Media Solutions FOR PUBLISHERS FOR APP DEVELOPERS FOR CTV/OTT PUBLISHERS FOR BUYERS FOR COMMERCE MEDIA FOR AGENTS Products FOR PUBLISHERS: PUBMATIC SSP CONNECT OPENWRAP SDK ACTIVATE FOR BUYERS: PUBMATIC SSP CONNECT ACTIVATE AUCTION PACKAGES FOR COMMERCE MEDIA: CONVERT ACTIVATE CONNECT Resources OUR Resources VIEW ALL PubMatic Blog Research Customer Stories Events PubAcademy Documentation About OUR Company About Us RESPONSIBILITY Locations News Investor Relations Careers OUR Careers Overview Jobs Engineering Our People Diversity & Inclusion Life @ PubMatic India Login Publishers Media Buyers ACTIVATE What can we help you find? TRENDING Activate Agentic Auction Packages CTV Activate Agentic Auction Package CTV OpenWrap OpenWrap SDK Live Sports Political Creative Innovation Suite Programmatic Mobile AI Hub Video Hub Resource Hub Executive Dialogues Voters Commerce Media Solutions FOR PUBLISHERS FOR APP DEVELOPERS FOR CTV/OTT PUBLISHERS FOR BUYERS FOR COMMERCE MEDIA FOR AGENTS Products FOR PUBLISHERS: PUBMATIC SSP CONNECT OPENWRAP SDK ACTIVATE FOR BUYERS: PUBMATIC SSP CONNECT ACTIVATE AUCTION PACKAGES FOR COMMERCE MEDIA: CONVERT ACTIVATE
902 more words follow in the initial HTML.
| Check | Result | Detail |
|---|---|---|
| H1 in the initial HTML | Found one H1 | First H1: AI-POWERED ADVERTISING PERFORMANCE FOR PREMIUM DIGITAL MEDIA |
| First 200 words in the initial HTML | Found 200 of 200 words | The initial HTML carries 1102 words of visible text; the first 200 are marked in the left pane. |
| llms.txt present and linked | Note present, not linked | 26585 bytes, 136 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 | Found BreadcrumbList, EntryPoint, ImageObject, ListItem and 6 more | 10 schema.org types in JSON-LD blocks on the home page: BreadcrumbList, EntryPoint, ImageObject, ListItem, Organization, PropertyValueSpecification, ReadAction, SearchAction, WebPage, WebSite. |
| 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 pubmatic.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