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Generative engine optimisation

llms.txt vs schema markup

Measured weekly since 2026-W25. 12 observations.

Measured 2026-W36 · 2026-08-31 · google.com, gl=us

2026-W36

This week

AI Overview
Showing
in 11 of 12 weeks
Sources cited
6
2 of them not in the top 10
Organic results
10
returned on page one
Weekly churn
10%
of the top 10 changes each week
AI Overview, week by week
2026-W252026-W36
How much the top 10 moved

Google is answering this query itself, and 2 of the 6 sources it credits do not appear in the ten results below.

Citations

What the AI Overview cites

DomainStatusOrganic position
github.comCited and ranking3
capterra.comCited and ranking7
geeksforgeeks.orgCited and ranking8
digitalocean.comCited, not ranking
ai-overview.ioCited, not ranking
stackoverflow.comCited and ranking2

A domain marked Cited, not ranking is credited in Google's answer while sitting outside the ten organic results. Across the whole corpus that is true of 38.8% of citations.

Page one

Organic results

#DomainTitleIn the overviewSitelinks
1developer.mozilla.orgdeveloper: llms.txt vs schema markupNot cited
2stackoverflow.comA practical guide to llms.txt vs schema markupCited
3github.comLlms.txt vs schema markup in 2026Cited
4llms-txt.ioLlms.txt vs schema markup | llms.txt docsNot cited
5freecodecamp.orgLlms.txt vs schema markup in 2026Not cited
6entity-seo.comA practical guide to llms.txt vs schema markupNot cited
7capterra.comLlms.txt vs schema markup in 2026Cited
8geeksforgeeks.orgLlms.txt vs schema markup in 2026Cited
9ai-mode.ioLlms.txt vs schema markup in 2026Not cited
10g2.comLlms.txt vs schema markup — g2Not cited
Since 2026-W29

Position history

DomainW29W30W31W32W33W34W35W36
developer.mozilla.org11111111
github.com23333333
stackoverflow.com32222222
llms-txt.io44444444
freecodecamp.org56555555
entity-seo.com65666666

A dot means the domain was not on page one that week. This is the part no live SERP checker can show you: it needs someone to have been measuring before you asked.

Blocks

Features on this page

AI Overview People Also Ask Related searches Knowledge panel Sitelinks

Filled means Google rendered the block for this query this week. AI Overview, People Also Ask, Related searches, Knowledge panel, Sitelinks — each has its own prevalence across all 4,185 queries.

API

Reproduce this page

Every figure above comes from one call. This is that call — the same endpoint, the same parameters, run once a week.

curl --request GET \
  --url 'https://serpens.p.rapidapi.com/api/v1/search_ai_overview?q=llms.txt%20vs%20schema%20markup&gl=us&hl=en&format=json' \
  --header 'x-rapidapi-host: serpens.p.rapidapi.com' \
  --header 'x-rapidapi-key: YOUR_KEY'

Run it on your own queries

Free tier, no card. The AI Overview endpoint returns the overview, its citations, and the organic results in one response.

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One email each Monday covering llms.txt vs schema markup: what changed in the results, which domains moved, and where AI Overview switched on or off. Unsubscribe in one click.