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

priceless.com

https://priceless.com· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

priceless.com

Mobile

Sponsored

Hosting Provider

MasterCard Technologies LLC

IP Address

216.119.218.100

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 O'Fallon, United States

ASN

AS26380

Organization

MasterCard Technologies LLC

Server

Priceless

CDN

CloudFront

Nameservers

a9-64.akam.net.a26-66.akam.net.a7-67.akam.net.a22-65.akam.net.+2 more

Performance

Core Web Vitals

Weight

First Contentful Paint

803 ms10%

Speed Index

1.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

880 KB

95 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Platform

AWS CloudFront

CDN

CloudFront

Technology Stack

11 Technologies Detected

Libraries

CSS Frameworks

UI Components

Other

Other

Analytics

Security

Customer Support

SEO Analysis

C68/100

Meta Tags15/15

Content3/12

Headings6/8

Technical19/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile3/4

Indexability3/3

priceless.compriceless.com

Mastercard priceless™ | Le esperienze danno senso alla vita.

In esclusiva per i titolari di carte Mastercard, priceless.com offre esperienze indimenticabili nelle città in cui vivi e viaggi.

Title Length60 chars

Recommended: 50-60 chars (~357px / 580px)

Description Length129 chars

Recommended: 120-160 chars

Issues (1)

• Very thin content (9 words). Search engines need substantial content for ranking.

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

12,675 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

24/100

Needs Work

7 10 2

Sponsored

AI & LLM Readiness

F34/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

7/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:1%

Words:2,304

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

68/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

6/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

40/100

109 mg

CO₂e / view

880.0 KB

Page Weight

80%

Cleaner Than

New Visitor

124 mg

Returning (cached)

62 mg

Annual (10K/mo)

13.1 kg

Emission Segments

Data Center

24 mg

Network

26 mg

Device

58 mg

Resource Breakdown

JavaScript

717.9 KB

HTML

152.4 KB

Other

9.7 KB

Green Hosting Not Verified

MasterCard Technologies LLC

6 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

55%Poor

Critical / Transactional

HTTPS

No WAF

201d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

14.10.2025

Valid Until

12.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.priceless.com

SHA-256 Fingerprint

35:AC:C3:76:03:4F:9B:FA:90:12:C0:D5:00:E6:E1:1B:E5:9B:67:CB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

X-Requested-With

access-control-allow-origin

https://eupay.priceless.com

cache-control

🔴 No Cache(no-cache, no-store, must-revalidate)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors www.priceless.com;

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxb-00078002.gslb.pphosted.com

mxa-00078002.gslb.pphosted.com

Domain Information

priceless.com

Domain Age

28y 6m

Created

03.11.1997

Expires

02.11.2026

Last Updated

27.01.2026

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

72/100

Mobile Friendly92 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width,initial-scale=1.0,minimum-scale=1.0

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Mark For MC Narrow

WCAG Partial

67/100

Readability

/30

22/30

14px · LH 1.43

Hierarchy

/20

15/20

2x ratio

WCAG

/25

14/25

1:1 min contrast

Performance

/25

16/25

1 font

Heading Font

Mark For MC Narrow

Sans28px

Body Font

Mark For MC Narrow

Sans14px

Contrast Ratio

1:1

9 issues

Reading Comfort

~55 CPL

Optimal (45–75)

28px

21px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~55 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

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

Buy on MyFonts

Color Palette

7 unique colors

Light

#ffffff

Background· 20.299999999999997%

#110d0b

Primary· 44.8%

#35140e

Accent· 10.5%

#542617

Accent· 8.9%

#967a60

Secondary· 5.2%

#5c5447

Secondary· 4.6%

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

d5xydlzdo08s0.cloudfront.net(12)local(5)cdn.cookielaw.org(1)assets.adobedtm.com(1)maps.googleapis.com(1)

Website Identity

priceless.com

28 years old

Location detected: 🇺🇸 United Statesvia ip

CSC Corporate Domains, Inc.it-IT

Social Profiles

Facebook YouTube

Sponsored

Last analyzed: 25 Apr 2026 at 16:11

Historical Analysis & Change Tracking