Technical SEO + Schema — the foundation AI engines need to cite you.

Most businesses have technical SEO problems they don't know about. Broken schema, crawlability gaps, missing llms.txt - AI engines read all of it before deciding who to cite. Foundier fixes the technical foundation so AI search works for you, not against you.
Fix my technical SEO
Start with the audit
What we fix

The technical problems holding your site back — fixed.

Most sites have at least three critical technical SEO issues they don't know about. Schema gaps, crawlability blocks, slow Core Web Vitals — each one hurts your Google rankings. And now they hurt your AI search visibility too.

Schema markup

Missing schema, malformed JSON-LD, and wrong schema types are some of the most common — and most damaging — technical SEO issues. We audit every page, fix what's broken, and implement the schema types that give Google and AI engines the clearest possible signal about your business.

Schema is the primary signal AI engines use to understand and cite your business.

Crawlability & indexation

If Google's crawler can't reach a page, it can't rank it. Robots.txt blocks, noindex tags in the wrong places, broken sitemaps, and redirect chains are silent killers — they prevent your best content from ever being found. We map every crawl barrier and fix them in priority order.

AI crawlers follow the same access rules. Blocked pages can't be cited.

Site structure & internal linking

How your pages are connected tells search engines which content matters most. Flat site architecture, orphaned pages, and weak internal linking bleed authority away from your most important content. We rebuild the hierarchy so the right pages rank — and get cited.

Strong internal linking helps AI engines identify your most authoritative content.

Core Web Vitals

LCP, CLS, INP — Google's page experience signals directly impact how much it trusts and promotes your site. A slow, unstable page loses rankings before a competitor writes a single word of content. We diagnose the specific issues dragging your scores down and fix them at the root.

Poor Core Web Vitals reduce the trust score AI engines assign your content.

llms.txt

llms.txt is a new standard that tells AI crawlers what your site is about, what to trust, and what to ignore. Most businesses don't have one — which means ChatGPT, Perplexity, and Claude are guessing about your business every time someone asks about your category. We create and deploy it correctly.

Without llms.txt, AI engines guess at your business. Guessing wrong costs citations.

Entity clarity

Google and AI engines build a model of your business from your site, your schema, and your wider web presence. Inconsistent NAP data, vague copy, and conflicting signals create an unclear entity — which means lower rankings on Google and zero citations in AI answers.

A clear entity is the single biggest factor in whether AI engines cite your business.
What's included

Audit. Fix. Verify. In 2–4 weeks.

Every technical SEO + schema engagement runs through three phases — we find what's broken, fix it correctly, and verify the results. No guesswork. No open-ended timelines.

1Phase 1 — Week 1

Technical audit

A full diagnostic of everything holding your site back — on Google and in AI search.

  • Full crawl — every page, every error, every redirect chain
  • Schema markup audit — what's missing, what's malformed, what's wrong
  • Indexation review — noindex, canonical, and sitemap issues
  • Core Web Vitals diagnostic — LCP, CLS, INP across desktop and mobile
  • Internal linking map — hierarchy, orphaned pages, authority gaps
  • llms.txt status — present, configured, or missing
  • Entity clarity assessment — how AI engines currently understand your business
Delivered: full audit report with prioritised findings
2Phase 2 — Weeks 2–3

Implementation

We fix the issues — in priority order, with zero guesswork about what to tackle first.

  • Schema markup implementation — JSON-LD on every page, all relevant types
  • Technical fixes — robots.txt, sitemaps, redirect chains, canonicals
  • llms.txt creation and deployment
  • Internal linking restructure — hierarchy rebuilt for authority flow
  • Core Web Vitals fixes — image optimisation, render-blocking scripts, layout shift
  • Entity clarity fixes — NAP consistency, structured data alignment
  • Schema validation — every fix confirmed at validator.schema.org
Delivered: all fixes live, validation confirmed
3Phase 3 — Week 4

Verification & reporting

We confirm the work is performing — on Google and across AI engines.

  • Post-fix crawl — confirming every issue is resolved
  • Schema validation report — before and after
  • Core Web Vitals re-test — confirmed improvement scores
  • AI citation check — how AI engines read your site post-fix
  • Google Search Console review — indexation, coverage, enhancements
  • Prioritised next steps — what to tackle in the next sprint
  • Final handover documentation
Delivered: full verification report + 30-min walkthrough call
Why it matters now

Technical SEO was always important. The stakes just got higher.

The signals that helped you rank on Google are the same signals AI engines use to decide who to cite. Getting technical SEO right used to mean better rankings. Now it means existing in AI search at all.

Before AI search

Technical SEO affected your Google rankings.

Schema helped Google categorise your pages
Crawlability determined which pages got indexed
Core Web Vitals affected your page experience score
Entity clarity helped you rank for branded searches
Now

Technical SEO determines whether AI cites you at all.

Schema is the primary signal ChatGPT and Perplexity use to cite you
Crawlability determines whether AI engines can access your content at all
Core Web Vitals signal how much AI engines should trust your site
Entity clarity decides whether AI can identify your business as citable
What you walk away with

A technically clean site that performs everywhere.

Not just fewer errors in Search Console. A site that ranks better on Google, gets cited by AI engines, and earns the trust of every search system that matters.

Ranked.

Pages Google was ignoring start showing up

Crawlability fixes, corrected canonicals, and a clean site structure mean Google can finally index and rank the pages that matter. The content was always there — now Google can find it.

Cited.

AI engines can read, trust, and name you

Schema markup, llms.txt, and entity clarity give ChatGPT, Perplexity, Claude, and Google AI Overviews everything they need to cite your business confidently — instead of your competitors.

Fast.

Core Web Vitals in the green

LCP, CLS, and INP fixed at the root — not patched. A fast, stable site earns better rankings, better trust signals, and a better experience for every visitor who lands on it.

Clean.

A technical foundation your team can build on

No more rediscovering the same crawl errors every quarter. A technically sound site with documented schema, a validated structure, and a clear roadmap for what to build next.

Questions

Technical SEO, answered.

Everything businesses ask before starting a technical SEO engagement — answered straight.

What does a technical SEO agency actually do?
A technical SEO agency audits and fixes the behind-the-scenes issues that prevent search engines from properly reading, indexing, and ranking your site. That includes schema markup, crawlability, site structure, Core Web Vitals, redirect chains, canonical tags, and internal linking. Foundier also covers the AI-specific layer — llms.txt, entity clarity, and the structured data signals that determine whether AI engines like ChatGPT and Perplexity cite your business.
What's included in technical SEO services?
Foundier's technical SEO services run across three phases: a full audit (crawl, schema, Core Web Vitals, indexation, entity clarity, llms.txt), implementation (fixing every issue found, in priority order), and verification (post-fix crawl, schema validation, Core Web Vitals retest, AI citation check). Every engagement is 2–4 weeks with a final verification report and 30-minute walkthrough call.
How is technical SEO different from regular SEO?
Regular SEO is a broad term that covers content, keywords, backlinks, and technical health. Technical SEO specifically covers the infrastructure layer — how your site is built, structured, and read by search engines. It's the foundation everything else sits on. Without strong technical SEO, the best content in the world won't rank — because search engines can't access, understand, or trust it.
Do I need a technical SEO consultant or can I do it myself?
Some technical SEO tasks are manageable with a good tool (Screaming Frog, Ahrefs, Google Search Console). But diagnosing the root cause of crawlability issues, implementing correct JSON-LD schema for every page type, fixing Core Web Vitals at the code level, and configuring llms.txt correctly for AI engines — these require specialist knowledge. Most businesses that "do it themselves" fix the symptoms and miss the underlying issues.
How long does technical SEO take to show results?
Most technical SEO fixes — crawlability, schema, redirects — are indexed by Google within 2–4 weeks of implementation. Core Web Vitals improvements typically show in Google Search Console within the same window. AI citation improvements can show faster, because AI engines re-index more frequently than Google. A full engagement with Foundier runs 2–4 weeks of active work, with measurable changes visible within 30 days post-implementation.
What is schema markup and why does it matter?
Schema markup is structured data — code added to your pages that tells search engines and AI engines exactly what your content is about. It's the difference between Google guessing that your page is about a service and knowing it, with the business name, service type, location, and pricing clearly defined. For AI search, schema is even more critical — it's the primary signal ChatGPT, Perplexity, and Google AI Overviews use to decide whether your business is citable.
How does technical SEO affect AI search visibility?
AI engines use the same technical signals as Google — schema, crawlability, entity clarity — to decide who to cite in their answers. A site with broken schema, crawl blocks, or vague entity signals is invisible to AI engines even if it ranks on Google. Technical SEO is now the foundation of AI visibility. Foundier's technical SEO services are built with both Google and AI engines in mind from the start.
What's the difference between technical SEO and on-page SEO?
Technical SEO covers infrastructure — how your site is built, crawled, and indexed. On-page SEO covers content — keywords, headings, copy, internal links. Both matter, but technical SEO comes first. If your site can't be crawled and indexed correctly, on-page optimisation has no foundation to sit on. Foundier's technical SEO services fix the infrastructure layer — once that's clean, on-page and AI SEO work is far more effective.
Do I need technical SEO if my site already ranks on Google?
Ranking on Google doesn't mean your technical SEO is clean — it means Google is working around your issues well enough to rank some pages. Most ranking sites still have schema gaps, crawlability inefficiencies, and Core Web Vitals problems that are costing them positions they don't know they're losing. And ranking on Google is now separate from being cited in AI search — you can rank well and be completely invisible in ChatGPT and Perplexity.
What is llms.txt and do I need one?
llms.txt is a new standard — similar to robots.txt but for AI language models. It tells AI crawlers what your site is about, which content to trust, and how to represent your business accurately. Without it, AI engines piece together an understanding of your business from whatever they can find — which often means incomplete or inaccurate citations. Most businesses don't have one yet. Adding a correctly configured llms.txt is one of the fastest wins in AI visibility.

WORK WITH US

Fix the technical foundation. Win Google and AI search.

Whether you need a full technical SEO audit or you already know what’s broken — Foundier fixes it correctly, verifies the results, and hands over a site that performs everywhere.

Let's talk