GXGeoXylia
FeaturesPricingBlogAboutFree Audit
All Articles
Technical

Free SEO Audit API: Complete 2026 Guide to AI-Powered Site Analysis

Most SEO audit tools give you a PDF and a pat on the back. A real SEO audit API gives you data you can act on — at scale, in your own workflow. Here's how to use one without spending a dime.

Ethan Lim2026-05-1512 min read
Share:
Free SEO Audit API: Complete 2026 Guide to AI-Powered Site Analysis
---------------------
60-79Good but improvableAddress top 3 recommendations
40-59Significant gapsFocus on entity consistency and schema
Below 40Major barriersFull technical overhaul needed

The score is not a Google ranking prediction. It's an AI citation probability model — specifically, how likely Perplexity, ChatGPT, and Gemini are to include your content as a cited source in their responses.

Entity Consistency Score

Scores below 80 almost always indicate one of three problems: mismatched business name variations across platforms (GeoXylia vs. GeoXylia Inc.), conflicting category descriptions between schema and Wikipedia, or missing sameAs links in your Organization schema pointing to your official social profiles.

llms.txt Status

If llms.txt is missing, creating one is the single highest-impact action you can take for AI visibility. The file is trivial to create — it's a plain text file — and the impact on AI crawler efficiency is immediate. GeoXylia's [llms.txt guide](/blog/llms-txt-what-it-is-why-you-need-it/) covers the exact format and best practices.

Schema Errors

Each error includes an `ai_impact` field explaining why it matters for AI citability. A missing `url` property in Organization schema doesn't just affect rich results — it weakens entity verification, which directly reduces citation probability.

Common SEO Audit API Questions

Does calling an API audit trigger a recrawl by Google?

No. The audit API performs its own analysis — it does not submit URLs to Google or any search engine. Calling the API does not affect your search indexing or ranking.

How often should I audit the same URL?

For active sites, weekly audits are sufficient for monitoring. Run a full audit after major site changes — a redesign, CMS migration, or significant content overhaul. For new pages, audit immediately after publishing to establish a baseline.

Can I audit subdomains or specific paths?

Yes. The API accepts any valid URL, including subdomains (`blog.example.com`), specific paths (`example.com/pricing`), and non-indexed URLs that you want to audit internally.

Does the API work for non-English sites?

Yes. GeoXylia's audit API analyzes technical signals and structured data regardless of language. Entity consistency checks are language-agnostic — they look at structured data patterns, not content language.

What's the difference between the API and the web-based audit tool?

The web audit tool at geoxylia.com/audit provides an interactive report with visualizations, prioritized recommendations, and guided fix instructions. The API returns the raw data underlying that report — the same scores, same errors, same recommendations — in JSON format. Use the web tool for manual exploration; use the API for automation and integration.

Your Next Steps

A free SEO audit API removes the last barrier to programmatic SEO analysis. You no longer need an enterprise budget or a dedicated developer to build automated audit workflows.

Here's what to do right now:

1. Get your free API key at geoxylia.com/api — no credit card required 2. Run your first audit with cURL or the web tool to see your baseline 3. Pick one automation from the use cases above and implement it this week 4. Set a weekly re-audit schedule so you track progress over time

The gap between "knowing your site has problems" and "systematically fixing them" is data and automation. The free SEO audit API is how you close that gap.

Run your first audit at [geoxylia.com/audit](/audit) — or dive straight into programmatic access at [geoxylia.com/api](/api) to start building your automated SEO workflow today.

G

About the author

Ethan Lim

Part of the GeoXylia content team, covering AI search, GEO strategy, and the evolving landscape of how AI systems cite and reference web content.

Is your site ready for AI search?

Get your free AI Visibility Score in 60 seconds. See how ChatGPT, Perplexity, and Google AI Overviews view your site.

No signup required · 8-dimension analysis · Instant results

See how your site scores on Technical →

Run a free AI Visibility Audit and get a full breakdown across all 9 dimensions.

Run a Free AI SEO Audit
GXGeoXylia

AI audit platform. Built for how AI systems find and cite content — not just how search engines rank it.

Zhenliang Lim — Founder on LinkedInGeoXylia audit tool — GitHubFollow GeoXylia on X

Product

Free AuditFeaturesPricingBlogFAQMethodology

Company

AboutContactDashboard

Legal

Privacy PolicyTerms of Service
© 2026 GeoXylia. Built for the AI-first web.