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Website SEO audits + APIOne SEO API
One SEO API
for scores, audits, analysis, and reports.
Use Nucez as your SEO score API, SEO check API, SEO audit API, SEO analysis API, and SEO report API. Analyze metadata, content quality, trust signals, sitemap coverage, and technical health with structured, product-ready output.
Free checks
5 / day
Full-depth free checks
2 / day
Public plans
0
Manual runs / hour
-
Try instantly
Run your free SEO check now
No signup needed. Paste a URL, choose a quick check or a full-depth scan, and get score, on-page checks, technical checks, and prioritized guidance. Includes 2 full-depth checks free per day.
API coverage
One API, multiple SEO workflows
Use the same platform for quick page checks, deeper audits, report generation, and embedded SEO features in your own product. The output stays structured, readable, and ready to use in client-facing tools.
SEO score API
Return a normalized page score with grouped findings so apps and dashboards can explain quality clearly.
SEO API
Use one endpoint family for page checks, report rendering, usage analytics, and client-facing SEO workflows.
SEO check API
Run single-page checks fast for landing pages, campaign pages, and pre-launch validation.
SEO audit API
Create deeper audits with category scores, prioritized issues, and structured technical findings.
SEO analysis API
Inspect metadata, headings, links, sitemap quality, and JavaScript-related SEO signals in one response.
SEO tool API
Embed SEO checks into your SaaS, agency dashboard, or internal ops product without rebuilding the engine.
SEO report API
Generate report-ready payloads that can power a full result page, share link, or exported summary.
Simple flow, detailed output
1. Submit a URL
Run a check for any public page with one request.
2. Read score and findings
Get technical + on-page quality data in one response.
3. Fix, track, improve
Re-check and show measurable SEO progress over time.
Ready for public API products
From free checks to client panel usage and API key governance, the platform supports both launch and scale.
- Agencies auditing many customer domains each day
- SaaS products adding SEO scoring as a premium feature
- Founders validating landing pages before campaigns
- Marketing teams monitoring website health over time
Instant SEO Snapshot
Get a fast score, prioritized findings, and direct recommendations in seconds so teams know what to fix first.
Actionable Priorities
Every audit comes with ranked findings so you can focus on the biggest ranking opportunities first.
Sitemap Analytics
Discover sitemap URLs, sample indexability quality, and template-level gaps across listed pages.
Keyword Tracking (Phase 4)
Track priority keywords per domain, log rank snapshots, and monitor trend movement over time.
Usage Visibility
Track request volume, key activity, and traffic sources without digging through technical logs.
Client Self-Service Portal
Give clients their own panel for keys, usage data, and audit history in one place.
Safe API Key Controls
Create and manage keys with limits, status controls, and easy ownership by client or project.
Depth by Plan
Free checks stay lightweight while higher plans can unlock deeper analysis, more manual domain runs per hour, and shareable audit links.
From the blog
View all blog postsContent built around SEO API implementation
Read detailed breakdowns on SEO score APIs, audit APIs, reporting flows, and JavaScript-aware analysis.
Mar 13, 2026SEO APIs
Choosing an SEO score API for dashboards, portals, and client products
What teams should expect from an SEO score API, how scoring models stay useful, and which output shapes work best in dashboards and client portals.
Read articleMar 12, 2026Agency workflows
What agencies need from an SEO audit API
A strong SEO audit API has to support repeatable client work, stable report generation, and controls for multi-client usage.
Read articleMar 07, 2026Structured data
Structured data validation: what an SEO API should surface
Schema markup checks are only useful when the output tells teams what is missing, what conflicts, and what can be shipped next.
Read article