astro.build

scanned 7/25/2026, 7:40:56 PM · cached · refresh in 19h · rubric 2026.07.4

Built with Webflow

Needs work

This is how AI agents (not browsers) experience astro.build. The score weights five categories of machine-readability; the ticks on the arc are the 30 individual checks behind it.

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Top fixes

failSitemap presentDiscoverability

No reachable sitemap.xml. Publish one and reference it in robots.txt.

Fix · Webflow: Publish /sitemap.xml and reference it from robots.txt with a Sitemap: line.

failJSON-LD presentStructured data

No JSON-LD blocks found. Add a <script type="application/ld+json"> with a schema.org type for this page.

Fix · Webflow: Add JSON-LD in Page Settings → Custom Code (inside <head>) for the page’s type.

warnllms.txt presentDiscoverability

Found /llms.txt but missing H1 header and markdown links.

Fix · Webflow: Publish /llms.txt at your domain root. Build a spec-compliant one at /tools/llms-txt-generator.

failLink response headersDiscoverability

No HTTP Link: response headers. Emit canonical/alternate/describedby relations so HEAD-only or stream-rendering agents get them without parsing HTML.

Fix: Emit `Link:` headers for canonical, alternate-language, and describedby relations. Agents that fetch HEAD-only or stream-render rely on these.

failText-to-markup ratioReadability

Visible text is 2.1% of HTML weight (6719/322307 bytes). Low. Markup may be crowding out agent-usable text.

Fix: Heavy ad or navigation markup crowds out agent-usable text. Aim for a text-to-DOM ratio above 15%.

failSchema type coverageStructured data

Page looks like Product / Article|BlogPosting|NewsArticle; missing JSON-LD type(s): Product, Article|BlogPosting|NewsArticle.

Fix: Align JSON-LD type to page purpose. Product pages without Product markup are skipped by agent shopping flows.

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Fix it

Generated, ready-to-ship files for the gaps above — copy them or download and drop them into your repo.

Add an llms.txt

Publish this at https://astro.build/llms.txt

# Astro

> Astro builds fast content sites, powerful web applications, dynamic server APIs, and everything in-between.

## Key pages
- [Home](https://astro.build/)
- [The web framework for content-driven websites](https://astro.build/)
- [Astro is a JavaScript web framework optimized for building fast, content-driven websites.](https://astro.build/)
- [Server-First](https://astro.build/)
- [Content-Driven](https://astro.build/)
- [Customizable](https://astro.build/)
- [Astro Islands](https://astro.build/)

## About
Describe what astro.build does, who it's for, and the primary action you want an
agent to be able to complete. Keep it factual and current.

What the agent receives

The agent’s-eye view

Astro Skip to content Astro Logo Documentation Blog Resources Themes Integrations Site showcase Tutorials Community Discord Sponsors Merch Enterprise Agencies New Case studies Go to Astro&#39;s GitHub repo Show Menu Blog Resources Themes Integrations Site showcase Tutorials Community Discord Sponsors Merch Enterprise Agencies New Case studies Follow Astro on Bluesky Join the Astro community on Discord Go to Astro&#39;s GitHub repo Follow Astro on LinkedIn Follow Astro on Mastodon Join the official Astro community on Reddit Follow Astro on x.com (formerly Twitter) Follow Astro on YouTube Read the docs Astro 7.1 Available now! The web framework for content-driven websites Astro powers the world&#39;s fastest marketing sites, blogs, e-commerce websites, and more. Get Started npm create astro@latest Copied! Used by the largest companies around the world: What is Astro? Astro is a JavaScript web framework optimized for building fast, content-driven websites. Server-First Astro improves website performance by rendering components on the server, sending lightweight HTML to the browser with zero unnecessary JavaScript overhead. Content-Driven Astro was designed to work with your content, no matter where it lives. Load data from your file system, external API, or your favorite CMS. Customizable Extend Astro with your favorite tools. Bring your own JavaScript UI components, CSS libraries, themes, integrations, and more. Best-In-Class Performance Astro Islands Islands optimize your website like no other web framework can. Leverage Astro&#39;s unique page load performance to improve conversion rates, Core Web Vitals, and SEO. % of real-world sites with good Core Web Vitals Astro Astro Core Web Vitals Passing 66% WordPress WordPress Core Web Vitals Passing 48% Gatsby Gatsby Core Web Vitals Passing 47% Next.js Next.js Core Web Vitals Passing 30% Nuxt Nuxt Core Web Vitals Passing 28% View the full dataset &middot; Based on real-world performance data from HTTP Archive and the Chrome UX Report . Maximum Flexibility Zero Lock-in Astro supports every major UI framework. Bring your existing components and take advantage of Astro&#39;s optimized client build performance. Integrate your favorite framework React Vue Preact Svelte Solid --- import BuyButton from '../components/BuyButton.jsx' ; import { getProductDetails } from "ecommerce-package" ; import ProductPageLayout from '../layouts/ProductPageLayout.astro' ; const product = await getProductDetails ( Astro . params . slug ); --- &#x3C; ProductPageLayout > &#x3C; img src = { product . imageUrl } alt = { product . imageAlt } /> &#x3C; h2 > { product . name } &#x3C;/ h2 > &#x3C; BuyButton id = { product . id } client:load /> &#x3C;/ ProductPageLayout > {product.name} "> Snapback Cap $25.00 Add to cart Everything you need Fully Featured Astro comes with everything you need to build a modern website. Need more? Extend Astro with integrations. Content Collections Organize your Markdown and MDX with built-in TypeScript type-safety and frontmatter validation. 0 Zero JavaScript, By Default Astro only ships the JavaScript you need and automatically strips away the rest for a faster website. View Transitions Seamlessly morph, fade, and swipe across pages with built-in, browser-native View Transition APIs. 800px • WEBP 3600px • PNG Optimized Images Eliminate layout shift and serve optimized, modern image formats with Astro’s built-in components and utilities. UI Integrations Bring your favorite UI frameworks and component libraries with Astro&#39;s flexible island architecture. React Vue Svelte Angular Preact Solid Qwik File-Based Routing Astro’s flexible routing system lets you understand your site’s structure at a glance. pages api json.ts blog [slug.astro] 404.astro about.astro index.astro Middleware Wrap incoming requests with custom logic like authentication, logging, or data fetching. Actions Write type-safe backend functions that you can call directly from your frontend JavaScript client code. Deployment Adapters One-line configuration for Netlify, Vercel, AWS, or your favorite hosting platform. Node.js Cloudflare Vercel Netlify SST Deno AWS Simple Templating If you know HTML, you already know enough to write your first Astro component. Build powerful server components everyone on your team understands. &lt;Logo&gt; &lt;NavLinks&gt; &lt;Hero&gt; &lt;Article&gt; &lt;Video&gt; Instant Page Loads Optimize page loading with intelligent automatic prefetching. Pick from the built-in presets or tailor a strategy perfect for your site. AI-Ready Integrate Astro’s official MCP server and context files with your favorite AI tools for a best-in-class development experience. Environment Variables Avoid common configuration mistakes with a built-in API to manage your environment variables. Dev Toolbar Extend your development environment with apps and integrations for the built-in development toolbar. Ecosystem Themes Get started faster with a pre-built website theme for Astro. Customize it to make it your own. Trending E-Commerce Blogs Docs Portfolios Landing Pages View Theme View Theme View Theme View Theme View Theme Browse more themes View Theme View Theme View Theme Browse more e-commerce themes View Theme View Theme View Theme View Theme View Theme View Theme Browse more blog themes View Theme View Theme View Theme Browse more documentation themes View Theme View Theme View Theme View Theme View Theme Browse more portfolio themes View Theme View Theme View Theme View Theme View Theme Browse more landing page themes Astro Partner Agencies Get professional Astro support Find the right team for your project with an Astro Partner Agency. From landing pages to e-commerce, get the expert assistance you need. Explore partner agencies Bejamas Seibert Group GmbH Lucky Media Start building with Astro today Get Started npm create astro@latest Copied! Astro is free, open-source software made possible by these wonderful sponsors Netlify Webflow Cloudflare Mux ImageKit CloudCannon Mintlify ArcJet Datadog Databento Forminit Fortuna BairesDev N-iX Sponsor Astro Let's keep in touch Enter your email to stay up to date with the latest updates from Astro. Email Resources Docs Themes Integrations Site showcase Starter templates About Blog Case studies Partner with us Press Agencies Community Contributing Sponsors Wallpapers Swag Shop Legal Telemetry Privacy Policy Terms of Service MIT License &copy; 2026&nbsp; Astro Contributors Follow Astro on Bluesky Join the Astro community on Discord Go to Astro&#39;s GitHub repo Follow Astro on LinkedIn Follow Astro on Mastodon Join the official Astro community on Reddit Follow Astro on x.com (formerly Twitter) Follow Astro on YouTube

Show your score

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Full breakdown

12 pass1 warn14 fail3 skip

Show only failures

Discoverability

pass

robots.txt present

A robots.txt is reachable at the site root.

100/100

pass

robots.txt allows AI agents

All 8 answer-time access agents allowed.

100/100

fail

Content-Signal directivesemerging

No Content-Signal directives. Add e.g. `Content-Signal: ai-train=no, ai-summarize=yes` to declare granular AI usage policy beyond binary allow/disallow.

0/100

warn

llms.txt present

Found /llms.txt but missing H1 header and markdown links.

60/100

fail

Sitemap present

No reachable sitemap.xml. Publish one and reference it in robots.txt.

0/100

fail

Link response headers

No HTTP Link: response headers. Emit canonical/alternate/describedby relations so HEAD-only or stream-rendering agents get them without parsing HTML.

0/100

pass

Canonical URL

Canonical points to self: https://astro.build/.

100/100

fail

MCP server cardemerging

No valid MCP Server Card at /.well-known/mcp/server-card.json. Publish one so agents can discover your tools without HTML scraping.

0/100

fail

OAuth authorization metadataemerging

No RFC 8414 metadata at /.well-known/oauth-authorization-server. Agents that act on behalf of users need this to discover your authorization endpoints.

0/100

fail

OAuth resource metadataemerging

No RFC 9728 metadata at /.well-known/oauth-protected-resource. Publish it so agents can discover required scopes without hand-coded credentials.

0/100

fail

API catalog / OpenAPIemerging

No /.well-known/api-catalog (RFC 9727) and no /openapi.json|yaml. Publish one so agents that integrate with APIs can discover your endpoints.

0/100

fail

Web Bot Authemerging

No Web Bot Auth JWKS at /.well-known/http-message-signatures-directory.json. Publish one to allow trusted agents while keeping a default-deny posture for the rest.

0/100

Readability

fail

Markdown negotiationemerging

Accept: text/markdown returns HTML, not markdown. Serve a markdown variant of primary content when requested; agents summarize and cite it more reliably.

0/100

fail

Text-to-markup ratio

Visible text is 2.1% of HTML weight (6719/322307 bytes). Low. Markup may be crowding out agent-usable text.

16/100

skip

Content without JavaScript

Browser pass unavailable; cannot measure JS dependency.

—

pass

Heading hierarchy

Hierarchy is well-formed (1 H1, no skipped levels, 31 headings total).

100/100

pass

Cookie wall blocks content

No common consent-modal markers detected.

100/100

pass

Page title

A concise <title> is present (5 chars).

100/100

pass

Meta description

A well-sized meta description is present (107 chars).

100/100

Structured data

fail

JSON-LD present

No JSON-LD blocks found. Add a <script type="application/ld+json"> with a schema.org type for this page.

0/100

skip

Structured data validates

No JSON-LD blocks present; nothing to validate (covered by structured_data.jsonld_present).

—

fail

Schema type coverage

Page looks like Product / Article|BlogPosting|NewsArticle; missing JSON-LD type(s): Product, Article|BlogPosting|NewsArticle.

0/100

Actionability

pass

Paywall / login wall

No paywall or login-wall detected on the landing URL.

100/100

fail

Agent Skills manifestemerging

No Agent Skills manifest at /.well-known/agent-skills.json. Enumerate the tasks agents can perform (search, add-to-cart, contact-support) so they pick the right one without scraping.

0/100

fail

WebMCP actionsemerging

No WebMCP detected. On pages with first-class actions (cart, support, account), embed a WebMCP server so on-page agents invoke tools directly.

0/100

pass

Primary action reachable

Primary offering identified ("JavaScript web framework for content-driven websites") with price/CTA ("Get Started").

100/100

pass

Reachability

HTTP 200.

100/100

Performance

pass

Time to first byte

TTFB 91ms. Healthy.

100/100

skip

Full render time

Full-render time unavailable (browser pass skipped or failed).

—

pass

Page weight

Initial document is a lean 315 KB.

100/100

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