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://amplitude.com/ answered 200 with text/html, 373 KB, read 8 November 2026, 14:11 UTC.

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

The page answers a plain fetch: 7 of 7 checks found.

Initial HTML what a plain fetch receives

<!DOCTYPE html>
<html data-dpl-id="dpl_CjyUL76uWTAjr33Hq6c1m6RT1MJc" lang="en-US" class="e1Nsyq_variable wuNWqq_variable">
<head>
<meta charSet="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
[... 81 more head elements folded ...]
<title>Amplitude | A new era for product teams
</title>
<meta name="description" content="From analytics to feedback to code, Amplitude brings AI into every step of building self-improving products. Start free with 2M events per month."/>
<meta name="robots" content="index, follow, max-video-preview:-1, max-image-preview:large, max-snippet:-1"/>
[... 1 more head element folded ...]
<link rel="canonical" href="https://amplitude.com"/>
<link rel="alternate" hrefLang="de-DE" href="https://amplitude.com/de-de"/>
<link rel="alternate" hrefLang="en-US" href="https://amplitude.com"/>
<link rel="alternate" hrefLang="es-419" href="https://amplitude.com/es-la"/>
<link rel="alternate" hrefLang="es-ES" href="https://amplitude.com/es-es"/>
<link rel="alternate" hrefLang="fr-FR" href="https://amplitude.com/fr-fr"/>
<link rel="alternate" hrefLang="ja-JP" href="https://amplitude.com/ja-jp"/>
<link rel="alternate" hrefLang="ko-KR" href="https://amplitude.com/ko-kr"/>
<link rel="alternate" hrefLang="pt-BR" href="https://amplitude.com/pt-br"/>
<link rel="alternate" hrefLang="pt-PT" href="https://amplitude.com/pt-pt"/>
<link rel="alternate" hrefLang="x-default" href="https://amplitude.com"/>
[... 22 more head elements folded ...]
</head>
<body>
<div hidden=""><!--$--><!--/$-->
</div>
<noscript>[... 151 characters folded ...]
</noscript>
<div class="flex flex-col min-h-screen">
<noscript data-nosnippet="true">[... 139 characters folded ...]
</noscript>
<div class="bg-white">
<div class="sticky top-[-1px] z-50 hide-ui">
<header class="mx-2 pt-[17px] lg:mx-[30px]">
<div class="fixed inset-0 bg-black transition-opacity duration-300 pointer-events-none -z-10 opacity-0">
</div>
<nav class="relative z-50 h-16 p-4 max-w-[1380px] mx-auto hidden lg:flex items-center justify-between rounded-[32px] transition-all duration-300 bg-transparent bg-opacity-100 text-black">
<div class="flex items-center gap-6"><a class="" href="/" aria-label="Amplitude home"><span>
<svg width="154" height="32" viewBox="0 0 154 32" fill="none" xmlns="http://www.w3.org/2000/svg">[... 7,564 characters folded ...]
</svg></span></a>
<div class="flex items-center">
<div><a class="transition-background-color duration-300 px-4 py-[7px] rounded-full hover:bg-gray-10 font-gellix font-semibold leading-[135%] tracking-[-0.04px] text-base" href="https://amplitude.com/self-improving-products?siteLocation=nav" aria-label="Platform"><span class="inline-block -translate-y-[1px]">Platform</span></a>
<nav aria-hidden="true" inert="" class="absolute left-0 top-0 w-full z-[-1] pt-20 pb-8 px-8 invisible pointer-events-none">
<div class="flex flex-row justify-between">
<div class="flex-1 transition-opacity duration-200 motion-reduce:transition-none opacity-0 delay-0">
<div class=" flex flex-col gap-3 font-gellix">
<h4 class="px-3 font-gellix font-semibold leading-[135%] tracking-[-0.04px] text-base text-[#868D95]">AI
</h4>
<div class="flex flex-col"><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="https://amplitude.com/wave?siteLocation=nav" aria-label="Wave">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Wave
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/ai-agents?siteLocation=nav" aria-label="Agents">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Agents
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="https://amplitude.com/headless" aria-label="Headless Amplitude">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Headless Amplitude
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="https://amplitude.com/agent-analytics?siteLocation=nav" aria-label="Agent Analytics">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Agent Analytics
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/mcp-server?siteLocation=nav" aria-label="Amplitude MCP">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Amplitude MCP
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/ai-feedback?siteLocation=nav" aria-label="AI Feedback">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">AI Feedback
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="https://amplitude.com/early-access-program?siteLocation=nav" aria-label="Early Access Program">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Early Access Program
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a>
</div>
</div>
</div>
<div class="flex-1 transition-opacity duration-200 motion-reduce:transition-none opacity-0 delay-0">
<div class=" flex flex-col gap-3 font-gellix">
<h4 class="px-3 font-gellix font-semibold leading-[135%] tracking-[-0.04px] text-base text-[#868D95]">Insights
</h4>
<div class="flex flex-col"><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/amplitude-analytics" aria-label="Product Analytics">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Product Analytics
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/web-analytics" aria-label="Marketing Analytics">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Marketing Analytics
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/session-replay?siteLocation=nav" aria-label="Session Replay">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Session Replay
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/heatmaps" aria-label="Heatmaps">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Heatmaps
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a>
</div>
</div>
</div>
<div class="flex-1 transition-opacity duration-200 motion-reduce:transition-none opacity-0 delay-0">
<div class=" flex flex-col gap-3 font-gellix">
<h4 class="px-3 font-gellix font-semibold leading-[135%] tracking-[-0.04px] text-base text-[#868D95]">Action
</h4>
<div class="flex flex-col"><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/guides-and-surveys" aria-label="Guides and Surveys">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Guides and Surveys
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/amplitude-experiment" aria-label="Feature Experimentation">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Feature Experimentation
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/web-experimentation" aria-label="Web Experimentation">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Web Experimentation
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/feature-management" aria-label="Feature Management">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Feature Management
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/activation" aria-label="Activation">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Activation
</div>
<div class="font-normal leading-[135%] text-sm text-[#373D42]">
</div></a>
</div>
</div>
</div>
<div class="flex-1 transition-opacity duration-200 motion-reduce:transition-none opacity-0 delay-0">
<div class=" flex flex-col gap-3 font-gellix">
<h4 class="px-3 font-gellix font-semibold leading-[135%] tracking-[-0.04px] text-base text-[#868D95]">Data
</h4>
<div class="flex flex-col"><a class="flex flex-col gap-0.5 px-3 py-2.5 hover:bg-[#F2F4F8] rounded-[6px] transition-background-color duration-200" href="/data-governance" aria-label="Data Governance">
<div class="font-semibold leading-[135%] tracking-[-0.04px] text-base text-gray-100">Data Governance
</div>

Shown with 64 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 373 KB.

Reading view the text a plain-fetch client can extract

title: Amplitude | A new era for product teams

A new era for product teams

Platform AI Wave Agents Headless Amplitude Agent Analytics Amplitude MCP AI Feedback Early Access Program Insights Product Analytics Marketing Analytics Session Replay Heatmaps Action Guides and Surveys Feature Experimentation Web Experimentation Feature Management Activation Data Data Governance Integrations Security & Privacy Solutions Solutions that drive business results Deliver customer value and drive business outcomes Amplitude Solutions → Industry Financial Services B2B Media Healthcare Ecommerce Use Case Acquisition Retention Monetization Team Product Data Engineering Marketing Size Startups Enterprise Resources Learn Blog Resource Library Compare Glossary Explore Hub Connect Community Events Customers Partners Support & Services Customer Help Center Developer Hub Product Updates Academy & Training Customer Success Tools Benchmarks Prompt Library Templates Tracking Guides Maturity Model Event Taxonomy Generator Pricing Login Contact sales Get started Platform AI Wave Agents Headless Amplitude Agent Analytics Amplitude MCP AI Feedback Early Access Program Insights Product Analytics Marketing Analytics Session Replay Heatmaps Action Guides and Surveys Feature Experimentation Web Experimentation Feature Management Activation Data Data Governance Integrations Security & Privacy Solutions Amplitude Solutions → Industry Financial Services B2B Media Healthcare Ecommerce Use Case Acquisition Retention Monetization Team Product Data Engineering Marketing Size Startups Enterprise Resources Learn Blog Resource Library Compare Glossary Explore Hub Connect Community

836 more words follow in the initial HTML.

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

H1Found
200 wordsFound
llms.txtFound
MarkdownFound
Missing pathFound
JSON-LDFound
OpenAPIFound

What a plain fetch found on amplitude.com
Check	Result	Detail
H1 in the initial HTML	Found one H1	First H1: A new era for product teams
First 200 words in the initial HTML	Found 200 of 200 words	The initial HTML carries 1036 words of visible text; the first 200 are marked in the left pane.
llms.txt present and linked	Found present and linked	16699 bytes, 61 links. Structure grade B (5 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 ContactPoint, EntryPoint, ImageObject, Offer and 7 more	11 schema.org types in JSON-LD blocks on the home page: ContactPoint, EntryPoint, ImageObject, Offer, Organization, PostalAddress, ReadAction, Service, SoftwareApplication, VideoObject, WebPage.
OpenAPI link	Found linked	The home page links an OpenAPI file. 97 percent of openapi.json fetches in Ora's lab arrived through a link.

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 amplitude.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