What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

xfyun.cn

https://xfyun.cn· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

xfyun.cn

Sponsored

Hosting Provider

Forest Eternal Communication Tech. co.

IP Address

42.62.43.219

Server Location

🇨🇳 Haidian, China

ASN

AS23724

Organization

Forest Eternal Communication Tech. co.

Server

Tengine

Nameservers

vip4.alidns.com.vip3.alidns.com.

Performance

Page Speed

2.3 MB

205 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Infrastructure

Hosting

Forest Eternal Communication Tech. co.

Technology Stack

9 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity

CSS Frameworks

Meta Frameworks

Web Servers

Frameworks

SEO Analysis

F32/100

xfyun.cnxfyun.cn

讯飞开放平台-以语音交互为核心的人工智能开放平台

科大讯飞推出的移动互联网智能交互平台，为开发者免费提供：涵盖语音能力增强型SDK，一站式人机智能语音交互解决方案，专业全面的移动应用分析；

Title Length24 chars

Recommended: 50-60 chars

Description Length69 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (125/127)

8 issues found

Upgrade to view details

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

293d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

07.11.2025

Valid Until

09.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.xfyun.cnxfyun.cn

SHA-256 Fingerprint

35:97:22:BF:8F:11:93:F6:F0:D7:DA:E0:E4:D2:CC:83:05:FA:EA:6D...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Wed, 18 Feb 2026 09:30:06 GMT

etag

W/"33f58-sRlm1/BjqGA9eciKal6vcK4SuKg"

server

Tengine

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

hzmx02.mxmail.netease.com

hzmx01.mxmail.netease.com

Domain Information

xfyun.cn

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Times New Roman + -apple-system

36/100

Readability

/30

20/40

13px · LH 1.77

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Times New Roman

Body Font

-apple-system

Sans13px

Contrast Ratio

Reading Comfort

~52 CPL

Optimal (45–75)

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.77 ratio ensures comfortable reading.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Risky: Text appears on background images without overlay protection.

✅ Optimal line length: ~52 characters per line is comfortable to read.

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Microsoft ClarityFree

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)googletagmanager.com(3)assets.growingio.com(1)idatalogconf.iflysec.com(1)google-analytics.com(1)

Sponsored

Last analyzed: 18 Feb 2026 at 09:30

Historical Analysis & Change Tracking