What is llms.txt and why does it matter in 2026?

llms.txt is a proposed standard for telling AI crawlers (ChatGPT, Claude, Perplexity, Gemini) what your site is about and which pages they should treat as canonical sources. As AI-assisted answer engines route more shopping queries, having a clean llms.txt — alongside structured data and IndexNow push — directly affects whether your products surface in AI-generated answers.

Do I still need traditional SEO if I install Index AI?

Yes — and Index AI does not pretend otherwise. Classic SEO (title tags, meta descriptions, internal linking, page speed) still earns Google blue links and image search. Index AI sits on top, focused on the AI-search execution layer (llms.txt, Schema, IndexNow, AI Readiness Score). The two stacks complement each other.

What does IndexNow actually do?

IndexNow is a push protocol — when a URL changes on your store, Index AI pings the IndexNow endpoint and supported engines (Bing, Yandex, others) pick the change up in minutes rather than weeks. Google does not yet consume IndexNow directly, but AI-answer engines drawing on Bing-aligned indices benefit indirectly.

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Integration

Index AI + Smart SEO.
How they compose, where each earns its place.

Two Shopify apps doing different jobs cleanly. Index AI the ai-search execution layer for shopify: llms.txt + schema + indexnow + ai readiness score. Smart SEO shopify seo automation — alt-text generation, meta-tag templating, sitemap hygiene, json-ld basics. Here's how they compose without conflicting, and where the integration genuinely earns the install.

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Our app

Index AI

by BrandUp Factory

The AI-search execution layer for Shopify: llms.txt + Schema + IndexNow + AI Readiness Score.

Smart SEO

Classic SEO · by Sherpas Design

Shopify SEO automation — alt-text generation, meta-tag templating, sitemap hygiene, JSON-LD basics.

Mature, lightweight, and the most-installed classic-SEO app on Shopify. Handles the boring-but-important on-page SEO basics at scale.

The integration angle

How Index AI + Smart SEO compose.

Smart SEO covers the classic-SEO surface (alt text, meta tags, sitemap hygiene, Google blue links); Index AI covers the AI-search execution surface (llms.txt, complete Schema.org suite, IndexNow push, AI Readiness Score). They target different decades of SEO and compose cleanly — most serious Shopify stores in 2026 should run both. The trap is using only Smart SEO and assuming you're "doing SEO" while leaving the AI-answer channel completely uncovered.

Concrete use cases

What this looks like in production.

Specific patterns where Index AI + Smart SEO compose into something neither tool could deliver on its own.

Smart SEO for alt text + meta tags at scale

Automate alt-text generation across 5,000+ product images via Smart SEO. Frees you to focus on the AI-search layer.

Index AI for llms.txt + Schema + IndexNow

The AI-search execution layer Smart SEO doesn't cover. Together they handle classic + AI-search end-to-end.

AI Readiness Score validates the combined stack

Index AI's readiness score flags gaps in either app's coverage — confirms the joint setup is hitting all surfaces.

Setup checklist

Get it running.

1
Install Smart SEO + Index AI.
2
In Smart SEO, configure alt-text + meta-tag templating.
3
In Index AI, run the AI Readiness Score and address any remaining gaps.
4
Cross-check: there should be no overlap (Smart SEO doesn't write llms.txt; Index AI doesn't automate alt text).

FAQ

About Index AI.

Going deeper

More on Index AI.

Index AI overview All integrations App comparisons

Compose Index AI with your stack.

Free to install. Works alongside Smart SEO — no conflicts, clean division of responsibility.

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Index AI + Smart SEO.How they compose, where each earns its place.