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sei.io

https://sei.io· First analyzed 06 May 2026· Updated 06 May 2026
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sei.io
Desktop screenshot of sei.io
Mobile screenshot of sei.io
Mobile

Sponsored

Hosting Provider

Vercel
vercel.com

IP Address

216.150.1.1

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

Nameservers

ns-357.awsdns-44.com.ns-973.awsdns-57.net.ns-1176.awsdns-19.org.ns-1953.awsdns-52.co.uk.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
605 ms10%
Speed Index
786 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
456 KB
48 requests

Image Optimization

Lazy LoadWebPResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
🔀 Hybrid
Frontend
Framework
Next.js
Styling
Tailwind CSS
CMS
Medium
Infrastructure
Platform
Vercel
CDN
Vercel Image

Technology Stack

6 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Platforms

1
Vercel

SEO Analysis

A83/100
26
2
0
Meta Tags14/15
Content6/12
Headings8/8
Technical24/25
E-E-A-T2/7
Images7/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
S
sei.iosei.io

Sei | The Fastest EVM Blockchain for High-Frequency Apps

Build high-frequency applications on Sei, the fastest Layer 1 EVM blockchain. Experience 400ms finality, 200K+ TPS, and ultra-low fees for DeFi, trading, and...

Description truncated.
Title Length56 chars

Recommended: 50-60 chars (~339px / 580px)

Description Length168 chars

Recommended: 120-160 chars

Issues (0)

    2 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    5 URLs

    robots.txt

    5 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    17/100
    Poor
    5 12

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D53/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    7/25
    Citation
    12/25

    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.txtvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:2%
    Words:165
    Token eff.:Too Short
    Sections/1K:54.5

    Structured Data

    2 JSON-LD
    Organization×1.1WebSiteSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary19w
    Descriptive Headingsavg 3.3w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    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.
    A
    81/100
    12
    Passed
    1
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    18/20
    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
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    4/15
    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.
    75/100
    A
    46 mg
    CO₂e / view
    456.1 KB
    Page Weight
    90%
    Cleaner Than
    New Visitor
    53 mg
    vs
    Returning (cached)
    26 mg
    Annual (10K/mo)
    5.5 kg
    Emission Segments
    Data Center
    2 mg
    Network
    14 mg
    Device
    30 mg
    Resource Breakdown
    JavaScript
    337.4 KB
    Images
    27.0 KB
    CSS
    11.6 KB
    HTML
    12.2 KB
    Other
    67.9 KB
    Green Hosting Verified
    Vercel
    Provider Match
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    100%Excellent
    Static / Informational

    HTTPS

    No WAF

    78d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    25.04.2026

    Valid Until

    24.07.2026

    Subject Alternative Names (1)

    www.sei.io

    SHA-256 Fingerprint

    4E:40:6E:C1:76:71:54:85:52:23:E7:BB:E1:2A:24:89:0C:2E:96:DF...

    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    *
    age
    1452758
    cache-control
    🟡 0s(public, max-age=0, must-revalidate)
    content-disposition
    inline
    content-encoding
    ⚡ Brotli(br)
    content-security-policy
    default-src 'self' https://cdn.sei.io; script-src 'self' 'un...
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    68

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (5)

    alt4.aspmx.l.google.com
    alt1.aspmx.l.google.com
    aspmx.l.google.com
    alt3.aspmx.l.google.com

    +1 more

    Domain Information

    sei.io

    Domain Age
    12y 10m

    Created

    04.07.2013

    Expires

    04.07.2026

    Last Updated

    10.06.2025

    Registrar

    NameCheap, Inc.

    DNSSEC
    Not Enabled

    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.
    B
    72/100
    Mobile Friendly
    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
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Inter

    WCAG Partial
    69/100
    Readability
    /30
    23/30

    20px · LH 1.40

    Hierarchy
    /20
    16/20

    3.6x ratio · ✓ H1→H6

    WCAG
    /25
    14/25

    1.1:1 min contrast

    Performance
    /25
    16/25

    2 fonts

    Heading Font

    Inter

    Sans72px

    Body Font

    Inter

    Sans20px

    Contrast Ratio

    1.1:1

    7 issues

    Reading Comfort

    ~35 CPL

    Narrow lines
    72px
    h1
    60px
    h2
    16px
    h3
    20px
    p

    ✅ Excellent readability: 20px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 24/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.1:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 3.6x larger than body text.

    Buy on MyFontsFlesch 24

    Color Palette

    7 unique colors
    Light
    #c5c5ce
    Secondary· 18.9%
    #e0e7f7
    Accent· 47.400000000000006%
    #a0201c
    Primary· 6.3%
    #b0b7c3
    Secondary· 6.2%
    #9a6f76
    Secondary· 2.7%
    #871016
    Accent· 2.1%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    16 Resources

    14
    Scripts
    2
    Styles
    12
    Async
    0
    Defer

    Top Script Sources

    local(13)googletagmanager.com(1)

    Website Identity

    Sei Protocol

    Sei Protocol

    Organization

    Build high-frequency apps on the fastest Layer 1 EVM blockchain.

    contact.us@seifdn.org
    www.sei.io
    12 years old
    Location detected: 🇺🇸 United Statesvia ip
    NameCheap, Inc.📧 Google WorkspaceenEst. 2022

    Sponsored

    Last analyzed: 06 May 2026 at 20:53

    Historical Analysis & Change Tracking