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SGSiteGraph

kalshi.com

Vercel Security Checkpoint

Last scanned Jul 25, 2026, 12:25 AM · 2 views

74

Overall score

Fair

Summary

This website uses Astro hosted on AWS behind Vercel CDN. SEO is fair (50/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

United States
Hosted on AWS

Top issues to fix

12 issues found · 4 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • TLS certificate expires in 30 days

    Security

    Renew soon or enable auto-renewal to avoid a browser-warning outage.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+6 more issues — details in the sections below.

50

SEO

7 issue(s) found

100

Performance

28 ms

65

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Meta tags

Title
Vercel Security Checkpoint
Description
Canonical
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Astro

Hosting & CDN

Hosting provider
AWS
CDN provider
Vercel
IP address
64.239.109.1
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 64.239.109.1
AAAA—
MX
  • alt1.aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • aspmx2.googlemail.com
  • aspmx.l.google.com
  • aspmx3.googlemail.com
TXT—
NS
  • violet.ns.cloudflare.com
  • dale.ns.cloudflare.com
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
kalshi.com
Valid from
May 26, 2026
Valid to
Aug 24, 2026
Days until expiry
30
SAN domains
kalshi.com

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

0 internal · 1 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

1 scripts · 0 stylesheets

JS / CSS size

25.5 KB · 3.2 KB

Page size

33.0 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing meta description
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found

Scan details

Requested URL
https://kalshi.com
Final URL
https://kalshi.com
HTTP status
429
HTTP version
HTTP/2
Response time
28 ms
HTML size
33.0 KB
Redirect chain
https://kalshi.com

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does kalshi.com use?
kalshi.com is built with Astro.
Is kalshi.com secure (HTTPS)?
Yes. kalshi.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 24, 2026.
Who hosts kalshi.com?
kalshi.com is hosted on AWS, behind Vercel CDN.
What is kalshi.com's SEO score?
kalshi.com scored 50/100 for SEO in the latest analysis (fair).
What is kalshi.com's overall website score?
kalshi.com has an overall SiteGraph score of 74/100, combining SEO, performance, security, and accessibility.