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

barcelona.cat

https://barcelona.cat· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

barcelona.cat

Mobile

Sponsored

Hosting Provider

Institut Municipal d'Informatica

IP Address

212.15.224.34

Server Location

🇪🇸 Barcelona, Spain

ASN

AS60314

Organization

Institut Municipal d'Informatica

Server

Nginx

CDN

CloudFront

Nameservers

ns3bcn.entorno.es.ns2.bcn.cat.ns1.bcn.cat.

Performance

Page Speed

3.2 MB

100 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

Frontend

Framework

jQuery

Styling

Bootstrap

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Institut Municipal d'Informatica

CDN

CloudFront

Detected API Sources

https://com-shi-va.barcelona.c...

Technology Stack

10 Technologies Detected

Libraries

CSS Frameworks

Analytics

Plausible Analytics Matomo

UI Components

Fancybox

Fonts

Google Fonts

Web Servers

Nginx

SEO Analysis

B70/100

barcelona.catbarcelona.cat

El portal web oficial de Barcelona | Ajuntament de Barcelona

Portal oficial de Barcelona. Accediu als tràmits de l'administració, actualitat de serveis municipals, mobilitat, agenda cultural i recursos per viure i treb...

Description truncated.

Title Length60 chars

Recommended: 50-60 chars

Description Length175 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (40/57)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

459 URLs

robots.txt

274 rules

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

214d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Firmaprofesional S.A.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

13.01.2026

Valid Until

16.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.barcelona.catbarcelona.cat

SHA-256 Fingerprint

6B:9F:36:94:15:53:D3:49:2E:0A:52:02:B5:B7:D5:96:44:B4:AF:90...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

age

241

cache-control

🟡 300s(max-age=300, public)

content-encoding

📦 Gzip(gzip)

content-language

content-length

18056

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

bcnweb11.bcn.es

Domain Information

barcelona.cat

Domain Age

19y 12m

Created

22.02.2006

Expires

22.02.2027

Last Updated

26.01.2026

Registrar

Entorno Digital

DNSSEC

Not Enabled

Typography & Readability

Source Sans 3 + sans-serif

71/100

Readability

/30

25/40

16px · LH 1.00

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Source Sans 3

Sans32px

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~43 CPL

Needs attention

32px

22px

16px

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

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

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

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

GGoogle Fonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Matomo (Piwik)Mid-Market

PlausibleSMB

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)ajuntament.barcelona.cat(2)youtube.com(2)cdn.lawwwing.com(1)plausible.io(1)

Website Identity

Instagram YouTube TikTok Telegram

Sponsored

Last analyzed: 14 Feb 2026 at 02:20

Historical Analysis & Change Tracking