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

shanghai.gov.cn

https://shanghai.gov.cn· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

shanghai.gov.cn

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Hosting Provider

China Mobile Communications Corporation - shanghai company

IP Address

183.194.243.128

Server Location

🇨🇳 Changning, China

ASN

AS24400

Organization

China Mobile Communications Corporation - shanghai company

Nameservers

ns3.shanghai.gov.cn.ns2.shanghai.gov.cn.ns.shanghai.gov.cn.

Performance

Page Speed

5 MB

96 requests

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

China Mobile Communications Corporation - shanghai company

Detected API Sources

https://voice.shanghai.gov.cn/...

Technology Stack

5 Technologies Detected

Frameworks

Libraries

UI Components

CSS Frameworks

Icon Libraries

SEO Analysis

D47/100

shanghai.gov.cnshanghai.gov.cn

上海市人民政府

中国上海

Title Length7 chars

Recommended: 50-60 chars

Description Length4 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

7 issues found

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Security Score

5%Critical

Critical / Transactional

HTTPS

No WAF

303d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

UniTrust

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

18.12.2025

Valid Until

18.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.shanghai.gov.cnshanghai.gov.cn

SHA-256 Fingerprint

13:C4:48:48:D4:52:27:E3:23:15:E2:33:E2:76:DC:21:32:3F:2B:A6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 21:31:25 GMT

etag

W/"6993ad8b-1ef4f"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mailgateway.shanghai.gov.cn

Domain Information

shanghai.gov.cn

DNSSEC

Not Enabled

Typography & Readability

Microsoft YaHei

49/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Microsoft YaHei

Sans

Body Font

Microsoft YaHei

Sans16px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

30px

20px

12px

16px

Minor Second

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

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

⚠️ Cramped layout: 19 elements lack adequate spacing.

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Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Social Media

LinkedIn WidgetsFree

Social widgets and sharing tools

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Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)stat.shanghai.gov.cn(5)jhelper.shanghai.gov.cn(2)voice.shanghai.gov.cn(2)wza.shanghai.gov.cn(1)

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Last analyzed: 17 Feb 2026 at 21:32

Historical Analysis & Change Tracking