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: 6 of 6 checks found.
Initial HTML what a plain fetch receives
<!doctype html>
<html
lang="en"
class="dark"
data-banner-state="visible"
data-assistant-state="closed"
data-page-mode="none"
data-current-path="/"
>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
<title>What is the Model Context Protocol (MCP)? - Model Context Protocol
</title>
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<meta data-mint-head name="generator" content="Mintlify">
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<link data-mint-head rel="canonical" href="https://modelcontextprotocol.io/docs/2026-07-28/getting-started/intro">
<link data-mint-head rel="alternate" type="application/xml" href="/sitemap.xml">
<link data-mint-head rel="alternate" type="text/markdown" href="/docs/2026-07-28/getting-started/intro.md">
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</head>
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</svg>
<div id="root">
<link rel="preload" as="image" href="https://mintcdn.com/mcp/2BMHnlNW5OqOohXZ/logo/light.svg?fit=max&auto=format&n=2BMHnlNW5OqOohXZ&q=85&s=a5ac61ce77858fb1ddaf6de761c39499"/>
<link rel="preload" as="image" href="https://mintcdn.com/mcp/2BMHnlNW5OqOohXZ/logo/dark.svg?fit=max&auto=format&n=2BMHnlNW5OqOohXZ&q=85&s=1227cb7feb8344f9f6288c6b5b0a6d80"/>
<style data-precedence="base-ui:low" data-href="base-ui-disable-scrollbar">.base-ui-disable-scrollbar{scrollbar-width:none}.base-ui-disable-scrollbar::-webkit-scrollbar{display:none}
</style>
<script>[... 413 characters folded ...]
</script><blockquote class="sr-only" data-agent-docs-index="true" aria-hidden="true">
<h2>Documentation Index
</h2>
<p>Fetch the complete documentation index at:<!-- --> <a href="/llms.txt" tabindex="-1">/llms.txt</a>
</p>
<p>Use this file to discover all available pages before exploring further.
</p></blockquote>
<style>:root{--banner-height:0px!important}
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<div class="max-lg:contents lg:flex lg:w-full" data-docs-theme="mint" data-assistant-layout="legacy">
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<svg aria-hidden="true" width="18" height="18" stroke-width="1.5" class="size-5 text-primary dark:text-primary-light shrink-0"><use href="#mi-mint-1-Sparkle"></use>
</svg><span class="font-medium text-gray-900 dark:text-gray-100">Assistant</span>
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<div class="flex items-center gap-1"><button class="group hover:bg-gray-100 dark:hover:bg-white/10 p-1.5 rounded-lg" aria-label="Maximize assistant panel">
<svg aria-hidden="true" width="18" height="18" stroke-width="2" focusable="false" class="size-4 sm:size-3.5 text-gray-500 group-hover:text-gray-700 dark:group-hover:text-gray-300 shrink-0"><use href="#mi-mint-1-Expand"></use>
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<div class="mx-8 text-center text-gray-400 dark:text-gray-600 text-xs chat-assistant-disclaimer-text">Responses are generated using AI and may contain mistakes.
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<div class="">
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<div class="relative flex items-end"><textarea id="chat-assistant-textarea" aria-label="Ask a question..." autoComplete="off" placeholder="Ask a question..." class="chat-assistant-input w-full bg-transparent border-0 peer/input text-gray-900 dark:text-gray- [... 182 characters folded ...]></textarea>
</div>
<div class="flex items-center justify-between px-2 pb-2"><input type="file" accept="image/*,.pdf,.js,.jsx,.ts,.tsx,.mjs,.cjs,.md,.mdx,.json,.html,.css,.py,.csv,.txt,.yaml,.yml,.xml,.sql,.sh,.bash,.zsh,.graphql,.gql,.toml,.env,.go,.rs,.rb,.java,.kt,.swift,.c,.cpp,.cc,.h,.hpp,.c [... 111 characters folded ...]><button type="button" class="p-1 rounded-lg text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200 hover:bg-gray-100 dark:hover:bg-white/10" aria-label="Add attachment">
<svg aria-hidden="true" width="18" height="18" stroke-width="1.5" focusable="false" class="size-3.5 shrink-0"><use href="#mi-mint-1-Attach"></use>
</svg></button><button class="chat-assistant-send-button flex justify-center items-center rounded-full p-1 size-6 bg-primary/30 dark:bg-primary-dark/30" aria-label="Send message" disabled="">
<svg aria-hidden="true" width="18" height="18" stroke-width="2" class="size-2.5 shrink-0 text-white dark:text-white"><use href="#mi-mint-1-Send"></use>
</svg></button>
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<div class="max-lg:contents lg:flex-1 lg:min-w-0 lg:overflow-x-clip">
<style data-custom-css-index="0" data-custom-css-path="style.css">[... 8,230 characters folded ...]
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<header id="navbar" data-layout-item="topbar" class="z-30 fixed lg:sticky top-0 w-full peer is-not-custom peer is-not-center peer is-not-wide peer is-not-frame">
<div id="navbar-transition" class="absolute w-full h-full flex-none transition-colors duration-500 border-b border-gray-500/5 dark:border-gray-300/[0.06] bg-background-light dark:bg-background-dark" data-is-opaque="false">
</div>
<div class="max-w-8xl mx-auto relative">
Shown with 100 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 159 KB.
Reading view the text a plain-fetch client can extract
title: What is the Model Context Protocol (MCP)? - Model Context Protocol
What is the Model Context Protocol (MCP)?
Documentation Index Fetch the complete documentation index at: /llms.txt Use this file to discover all available pages before exploring further. Skip to main content Assistant Responses are generated using AI and may contain mistakes. Model Context Protocol home page Version 2026-07-28 (latest) Search... ⌘ K Ask Assistant⌘ I Blog GitHub Discord Search... Navigation Get started What is the Model Context Protocol (MCP)? Documentation Specification Extensions Registry SEPs Community Get started What is MCP? About MCP Architecture Servers Clients Versioning Develop with MCP Connect to local MCP servers Connect to remote MCP Servers Build with Agent Skills Build an MCP server Clients SDKs Security Developer tools Inspector Debugging Examples Example Servers On this page Back to top What can MCP enable? Why does MCP matter? Broad ecosystem support Start Building Learn more Community Get started What is the Model Context Protocol (MCP)? Copy pageCopy page Copy pageCopy page MCP (Model Context Protocol) is an open-source standard for connecting AI applications to external systems. Using MCP, AI applications like Claude or ChatGPT can connect to data sources (e.g. local files, databases), tools (e.g. search engines, calculators) and workflows (e.g. specialized prompts)—enabling them to access key information and perform tasks. Think of MCP
311 more words follow in the initial HTML.
| Check | Result | Detail |
|---|---|---|
| H1 in the initial HTML | Found one H1 | First H1: What is the Model Context Protocol (MCP)? |
| First 200 words in the initial HTML | Found 200 of 200 words | The initial HTML carries 511 words of visible text; the first 200 are marked in the left pane. |
| llms.txt present and linked | Found present and linked | 50529 bytes, 364 links. Structure grade C (4 of 6). The home page links it, which is how agents reached it in Ora's lab. |
| Markdown on request | Found text/markdown | Accept: text/markdown returned 200 with text/markdown; charset=utf-8. Vary: Accept is set. |
| 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 Article, BreadcrumbList, ImageObject, ListItem and 4 more | 8 schema.org types in JSON-LD blocks on the home page: Article, BreadcrumbList, ImageObject, ListItem, Organization, TechArticle, 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 modelcontextprotocol.io.
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