Agent Ready HTML

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://supabase.co/ answered 200 with text/html, 1.3 MB, 1 redirect, read 8 November 2026, 13:39 UTC. Final URL: https://supabase.com/.

Permalink: /viewer/?url=https://supabase.co/

The page answers a plain fetch: 5 of 6 checks found.

Initial HTML what a plain fetch receives

<!DOCTYPE html>
<html data-dpl-id="dpl_4HXRJyc7qCRke5wT35RvvbvQPbqy" lang="en" class="__variable_100d9e __variable_474d57 __variable_c5d9c1">
<head>
<meta charSet="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
[... 74 more head elements folded ...]
<title>Supabase | The Postgres Development Platform
</title>
<meta name="description" content="Build production-grade applications with a Postgres database, Authentication, instant APIs, Realtime, Functions, Storage and Vector embeddings. Start for free."/>
[... 3 more head elements folded ...]
<link rel="canonical" href="https://supabase.com"/>
<link rel="alternate" type="text/markdown" href="https://supabase.com/index.md"/>
[... 22 more head elements folded ...]
</head>
<body>
<div hidden=""><!--$--><!--/$-->
</div><!--$--><!--/$-->
<script type="application/json" data-flag-values="true">{}
</script>
<script>[... 581 characters folded ...]
</script>
<section aria-label="Notifications alt+T" tabindex="-1" aria-live="polite" aria-relevant="additions text" aria-atomic="false" data-react-aria-top-layer="true">
</section>
<div class="inline-flex bg-popover rounded-lg fixed top-0 left-[10px] z-[100] w-fit -translate-y-[calc(100%+8px)] focus-within:translate-y-[10px] transition-transform duration-200 ease-out"><a href="#main" data-size="tiny" type="button" tabindex="0" class="relative inline-flex items-center justify-center cursor-pointer space-x-2 text-center font-medium ease-[cubic-bezier(0.22,1,0.36,1)] duration-200 transit [... 217 characters folded ...]><span class="truncate">Skip to content</span></a>
</div>
<div class="sticky top-0 z-40 transform" style="transform:translate3d(0,0,999px)">
<div class="absolute inset-0 h-full w-full bg-background/90 dark:bg-background/95 transition-all duration-300 opacity-100!">
</div>
<nav class="relative z-40 border-default border-b backdrop-blur-xs transition-all duration-300">
<div class="section-container relative flex justify-between h-16">
<div class="flex items-center flex-1 sm:items-stretch justify-between">
<div class="flex items-center">
<div class="flex items-center shrink-0"><a class="relative isolate block w-auto h-6 box-content -mx-2 -my-3 px-2 py-3 focus-ring focus-visible:ring-offset-background-alternative rounded-md transition-colors duration-200 ease-out motion-reduce:transition-none"  [... 123 characters folded ...]>
<svg viewBox="0 0 581 113" fill="none" width="124" height="24" aria-label="Supabase Logo" role="img">[... 5,852 characters folded ...]
</svg><span aria-hidden="true" class="pointer-events-none absolute inset-y-1.5 left-0.5 -z-10 rounded-md bg-overlay transition-[width,scale,opacity] duration-200 ease-out motion-reduce:transition-none w-9 scale-95 opacity-0"></span></a><span class="sr-only" role="status"></span>
</div>
<nav aria-label="Main" data-orientation="horizontal" dir="ltr" class="z-10 flex-1 justify-center static hidden pl-8 lg:flex h-16 items-stretch">
<div style="position:relative">
<ul data-orientation="horizontal" class="group flex flex-1 list-none justify-center h-full space-x-0 items-stretch" dir="ltr">
<li class="text-sm font-medium"><button id="radix-_R_15isnnalb_-trigger-Product" data-state="closed" aria-expanded="false" aria-controls="radix-_R_15isnnalb_-content-Product" class="group relative inline-flex items-center justify-center cursor-pointer  [... 564 characters folded ...]>Product<!-- --> 
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chevron-down relat [... 103 characters folded ...]><path d="m6 9 6 6 6-6"></path>
</svg></button>
<div id="radix-_R_15isnnalb_-content-Product" aria-labelledby="radix-_R_15isnnalb_-trigger-Product" data-orientation="horizontal" data-state="closed" class="left-0 top-0 w-full data-[motion^=from-]:animate-fade-in data-[ [... 772 characters folded ...]>
</div>
</li>
<li class="text-sm font-medium"><button id="radix-_R_15isnnalb_-trigger-Developers" data-state="closed" aria-expanded="false" aria-controls="radix-_R_15isnnalb_-content-Developers" class="group relative inline-flex items-center justify-center cursor-po [... 570 characters folded ...]>Developers<!-- --> 
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chevron-down relat [... 103 characters folded ...]><path d="m6 9 6 6 6-6"></path>
</svg></button>
<div id="radix-_R_15isnnalb_-content-Developers" aria-labelledby="radix-_R_15isnnalb_-trigger-Developers" data-orientation="horizontal" data-state="closed" class="left-0 top-0 w-full data-[motion^=from-]:animate-fade-in  [... 778 characters folded ...]>
</div>
</li>
<li class="text-sm font-medium"><button id="radix-_R_15isnnalb_-trigger-Solutions" data-state="closed" aria-expanded="false" aria-controls="radix-_R_15isnnalb_-content-Solutions" class="group relative inline-flex items-center justify-center cursor-poin [... 568 characters folded ...]>Solutions<!-- --> 
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chevron-down relat [... 103 characters folded ...]><path d="m6 9 6 6 6-6"></path>
</svg></button>
<div id="radix-_R_15isnnalb_-content-Solutions" aria-labelledby="radix-_R_15isnnalb_-trigger-Solutions" data-orientation="horizontal" data-state="closed" class="left-0 top-0 w-full data-[motion^=from-]:animate-fade-in da [... 776 characters folded ...]>
</div>
</li>
<li class="text-sm font-medium"><a class="group/menu-item flex items-center text-sm hover:text-foreground select-none gap-3 rounded-md p-2 leading-none no-underline focus-ring group-hover:bg-transparent text-foreground focus-visible:text-primary px-2.5 h-full" data-radix-collection-item="" href="/pricing">
<div class="flex flex-col justify-center">
<div class="flex items-center gap-1">
<p class="leading-snug text-foreground group-hover/menu-item:text-primary">Pricing
</p>
</div>
</div></a>
</li>
<li class="text-sm font-medium"><a href="/docs" class="group/menu-item flex items-center text-sm hover:text-foreground select-none gap-3 rounded-md p-2 leading-none no-underline focus-ring group-hover:bg-transparent text-foreground focus-visible:text-primary px-2.5 h-full" data-radix-collection-item="">
<div class="flex flex-col justify-center">
<div class="flex items-center gap-1">
<p class="leading-snug text-foreground group-hover/menu-item:text-primary">Docs
</p>
</div>
</div></a>
</li>
<li class="text-sm font-medium"><a class="group/menu-item flex items-center text-sm hover:text-foreground select-none gap-3 rounded-md p-2 leading-none no-underline focus-ring group-hover:bg-transparent text-foreground focus-visible:text-primary px-2.5 h-full" data-radix-collection-item="" href="/blog">
<div class="flex flex-col justify-center">
<div class="flex items-center gap-1">
<p class="leading-snug text-foreground group-hover/menu-item:text-primary">Blog
</p>
</div>
</div></a>
</li>
</ul>
</div>
<div class="absolute top-full flex justify-center inset-x-0 pointer-events-none">
<div data-state="closed" data-orientation="horizontal" class="origin-top-center relative mt-1.5 h-(--radix-navigation-menu-viewport-height) w-full overflow-hidden border bg text-popover-foreground shadow-lg data-[state=o [... 749 characters folded ...]>
</div>
</div>
</nav>
</div>
<div class="flex items-center gap-2 opacity-0 animate-fade-in scale-100! delay-300">
<div class="flex items-center gap-2 transition-opacity opacity-0"><a href="https://github.com/supabase/supabase" target="_blank" data-size="tiny" tabindex="0" class="relative items-center justify-center cursor-pointer space-x-2 text-center font-medium ease-[cubic-bezier(0.22,1,0.36,1)] [... 393 characters folded ...]><span class="truncate"><span class="flex items-center gap-1">
<svg class="w-6 h-6" viewBox="0 0 17 16" fill="none" xmlns="http://www.w3.org/2000/svg">[... 1,318 characters folded ...]
</svg>114.6K</span></span></a><a href="https://supabase.com/dashboard" data-size="tiny" type="button" tabindex="0" class="relative items-center justify-center cursor-pointer space-x-2 text-center font-medium ease-[cubic-bezier(0.22,1,0.36,1)] duratio [... 252 characters folded ...]><span class="truncate">Sign in</span></a><a href="https://supabase.com/dashboard/sign-up" data-size="tiny" type="button" tabindex="0" class="relative items-center justify-center cursor-pointer space-x-2 text-center font-medium ease-[cubic-bezier(0.22,1,0.36,1)] [... 502 characters folded ...]><span class="truncate">Start your project</span></a>
</div>
</div>
</div><button type="button" aria-expanded="false" class="inline-flex items-center justify-center cursor-pointer space-x-2 text-center font-medium ease-[cubic-bezier(0.22,1,0.36,1)] duration-200 transition-[background-color,bor [... 380 characters folded ...]><span class="sr-only">Main menu</span>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-menu absolute inset-0 m-auto size-4.5 transition duration-150 ease-out" aria-hidden="true"><path d="M4 5h16"></path><path d="M4 12h16"></path><path d="M4 19h16"></path>
</svg>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-x absolute inset-0 [... 113 characters folded ...]><path d="M18 6 6 18"></path><path d="m6 6 12 12"></path>
</svg></button>
</div>
</nav>
</div>
<div class="fixed inset-x-0 top-(--header-height) z-50 h-[calc(100dvh-var(--header-height))] flex-col bg-background hidden lg:hidden [--header-height:--spacing(16)]">
<div class="min-h-0 flex-1 overflow-y-auto overscroll-contain px-6 py-6">
<nav aria-label="Menu" class="flex flex-col gap-6">
<div class="@container">
<div class="hidden flex-wrap gap-2 @xl:flex"><button type="button" value="Product" aria-pressed="true" class="inline-flex h-8 items-center rounded-md border px-4 text-sm text-foreground-light focus-ring aria-pressed:bg-surface-200 aria-pressed:text-foreground aria-[current=true]:text-foreground">Product</button><button type="button" value="Developers" aria-pressed="false" class="inline-flex h-8 items-center rounded-md border px-4 text-sm text-foreground-light focus-ring aria-pressed:bg-surface-200 aria-pressed:text-foreground aria-[current=true]:text-foreground">Developers</button><button type="button" value="Solutions" aria-pressed="false" class="inline-flex h-8 items-center rounded-md border px-4 text-sm text-foreground-light focus-ring aria-pressed:bg-surface-200 aria-pressed:text-foreground aria-[current=true]:text-foreground">Solutions</button><a class="inline-flex h-8 items-center rounded-md border px-4 text-sm text-foreground-light focus-ring aria-pressed:bg-surface-200 aria-pressed:text-foreground aria-[current=true]:text-foreground" href="/pricing">Pricing</a><a href="/docs" class="inline-flex h-8 items-center rounded-md border px-4 text-sm text-foreground-light focus-ring aria-pressed:bg-surface-200 aria-pressed:text-foreground aria-[current=true]:text-foreground">Docs</a><a class="inline-flex h-8 items-center rounded-md border px-4 text-sm text-foreground-light focus-ring aria-pressed:bg-surface-200 aria-pressed:text-foreground aria-[current=true]:text-foreground" href="/blog">Blog</a>
</div><button type="button" class="flex h-8 w-full items-center justify-between rounded-md border-0 control-surface-shadows raised-control-surface pr-2 pl-4 text-sm text-foreground focus-ring @xl:hidden" id="radix-_R_9ksnnalb_" aria-haspopup="menu" aria-expanded="false" data-state="closed" tabindex="0">Product
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chevron-down size-4 text-foreground-muted" aria-hidden="true"><path d="m6 9 6 6 6-6"></path>
</svg></button>
</div><a class="group/menu-item flex text-foreground-light text-sm hover:text-foreground select-none gap-3 rounded-md p-2 leading-none no-underline focus-ring focus-visible:text-foreground items-center" href="/database">
<div class="shrink-0 border bg-surface-200 min-w-10 w-10 h-10 flex items-center justify-center rounded-lg">
<svg class="h-5 w-5 group-hover/menu-item:text-foreground group-focus-visible/menu-item:text-foreground" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" aria-hidden="true">[... 551 characters folded ...]
</svg>
</div>
<div class="flex flex-col justify-center">
<div class="flex items-center gap-1">
<p class="leading-snug text-foreground">Database
</p>
</div>
<p class="line-clamp-2 leading-snug text-foreground-lighter group-hover/menu-item:text-foreground-light group-focus-visible/menu-item:text-foreground-light text-xs">Fully portable Postgres database
</p>
</div></a><a class="group/menu-item flex text-foreground-light text-sm hover:text-foreground select-none gap-3 rounded-md p-2 leading-none no-underline focus-ring focus-visible:text-foreground items-center" href="/auth">
<div class="shrink-0 border bg-surface-200 min-w-10 w-10 h-10 flex items-center justify-center rounded-lg">
<svg class="h-5 w-5 group-hover/menu-item:text-foreground group-focus-visible/menu-item:text-foreground" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" aria-hidden="true">[... 528 characters folded ...]
</svg>
</div>
<div class="flex flex-col justify-center">
<div class="flex items-center gap-1">
<p class="leading-snug text-foreground">Authentication
</p>
</div>
<p class="line-clamp-2 leading-snug text-foreground-lighter group-hover/menu-item:text-foreground-light group-focus-visible/menu-item:text-foreground-light text-xs">User Management out of the box
</p>
</div></a><a class="group/menu-item flex text-foreground-light text-sm hover:text-foreground select-none gap-3 rounded-md p-2 leading-none no-underline focus-ring focus-visible:text-foreground items-center" href="/storage">
<div class="shrink-0 border bg-surface-200 min-w-10 w-10 h-10 flex items-center justify-center rounded-lg">
<svg class="h-5 w-5 group-hover/menu-item:text-foreground group-focus-visible/menu-item:text-foreground" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" aria-hidden="true">[... 680 characters folded ...]
</svg>
</div>

Shown with 212 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 1.3 MB.

Reading view the text a plain-fetch client can extract

title: Supabase | The Postgres Development Platform

Build in a weekend Scale to millions

Skip to content Product Developers Solutions Pricing Docs Blog 114.6K Sign in Start your project Main menu Product Developers Solutions Pricing Docs Blog Product Database Fully portable Postgres database Authentication User Management out of the box Storage Serverless storage for any media Edge Functions Deploy code globally on the edge Compute Private Alpha Sandboxes and backend services Realtime Synchronize and broadcast events Modules Vector AI toolkit to manage embeddings Cron Schedule and manage recurring Jobs Queues Durable Message Queues with guaranteed delivery FeaturesExplore everything you can do with Supabase. Build in a weekendScale to millions Start your project with a Postgres database. Add Authentication, Data APIs, Edge Functions, Realtime Data, Storage, and Vector embeddings. Start your project Request a demo Postgres Database Every project is a full Postgres database, the world's most trusted relational database. 100% portable Built-in Auth with RLS Easy to extend Authentication Add user sign ups and logins, securing your data with Row Level Security. Edge Functions Easily write custom code without deploying or scaling servers. $supabasefunctions deploy Storage Store, organize, and serve large files, from videos to images. Realtime Build multiplayer experiences with real-time data synchronization. Vector Integrate your favorite ML-models to store, index and search

1143 more words follow in the initial HTML.

5 found, 0 missing, 2 notes, from 7 checks run

  • H1Found
  • 200 wordsFound
  • llms.txtNote
  • MarkdownFound
  • Missing pathFound
  • JSON-LDFound
  • OpenAPINote
What a plain fetch found on supabase.co
CheckResultDetail
H1 in the initial HTMLFound one H1First H1: Build in a weekend Scale to millions
First 200 words in the initial HTMLFound 200 of 200 wordsThe initial HTML carries 1343 words of visible text; the first 200 are marked in the left pane.
llms.txt present and linkedNote present, not linked3298 bytes, 43 links. Structure grade C (4 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 requestFound text/markdownAccept: text/markdown returned 200 with text/markdown; charset=utf-8. Vary: Accept is set.
Status of a made-up pathFound 404/agent-ready-html-missing-path-check returned 404: a real status code for a missing page.
JSON-LD typesFound ContactPoint, ImageObject, Offer, OfferCatalog and 5 more9 schema.org types in JSON-LD blocks on the home page: ContactPoint, ImageObject, Offer, OfferCatalog, Organization, PostalAddress, Service, SoftwareApplication, WebSite.
OpenAPI linkNote none on the home pageNo 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 supabase.co.

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

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

Last reviewed 5 November 2026