indexo.dev

castle.io

.io crawl

First seen 2026-05-24 · Last seen 2026-05-29 · ok HTTP/1.1 200 2045 ms crawled 2026-05-29

US · 75.2.60.5 · AS16509 Amazon.com, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Castle – Stop bots and account abuse in minutes
Description
A complete suite of SDKs and APIs to monitor users, block bots, and stop in-app fraud.
Language
en
Generator
Astro v5.17.2
Canonical
https://castle.io/

Open Graph

url
https://castle.io/
title
Castle – Stop bots and account abuse in minutes
locale
en_US
site name
Castle
description
A complete suite of SDKs and APIs to monitor users, block bots, and stop in-app fraud.

Technology

CDN
Netlify
CMS
Gatsby 5.17.2
Analytics
  • Google Tag Manager

Third-party hosts loaded (2)

  • www.googletagmanager.com×2
  • px.ads.linkedin.com×1

DNS records live

NS
  • ns-1523.awsdns-62.org
  • ns-1818.awsdns-35.co.uk
  • ns-712.awsdns-25.net
  • ns-77.awsdns-09.com
MX
  • 1 aspmx.l.google.com
  • 10 aspmx2.googlemail.com
  • 10 aspmx3.googlemail.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
TXT
Show 4 TXT records
  • pardot785633=99843af77ca8b40fd9848ecea960ae5273e6553cf9c8dda7715fd73d99813de3
  • status-page-domain-verification=2tdhk6csjrdd
  • MS=2F280A3E3195E6CBA8451CEAFFD552779F0EE6DA
  • _cf-custom-hostname.trust.castle.io=8a21ce8d-7e18-4ba3-9e28-83b8553632e3
Verified for
  • Atlassian
  • Cursor
  • Google
  • Microsoft 365
  • Notion
  • Slack
  • Zapier

Email authentication partial

SPF
v=spf1 include:_spf.google.com include:sendgrid.net include:spf.mail.intercom.io include:aspmx.pardot.com include:stspg-customer.com include:emsd1.com -all
strict (-all)
DMARC
v=DMARC1; p=none; rua=mailto:group-dmarc@castle.io
policy: none (monitoring only)
DKIM
  • google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDWvEc2A2mnilT9ay30UFDezDTNmjfO0w/JkfniWhUn3uwltQayIs8aWFwDhAGIWu5sbt3V9HPM6h6d55xtLk…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxKGy37MKPlSz5vpyjM+Flr/+gD13q09hlbe6MKrfDjwv0a/RWHdsihOZ8wA3Pp/wf03iPG2cAVgy7rnXnX…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCegFtZ/SnIYpuHFkBFjHHRSljLpdh/8R/bUo33DwPXOlOsG28zGDDhEF8ubP86SR+t27mwhViND2Y4quB+ONtyXK…
selectors probed

Certificate (current)

E7
from 2026-05-24 to 2026-08-22
Expires in 82 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://castle.io/

present
  • strict-transport-security
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • missing Content Security Policy
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
strict-transport-security
max-age=31536000

Links to (11)

Linked from (1)