indexo.dev

mackerel.io

.io crawl

First seen 2026-04-22 · Last seen 2026-05-15 · ok HTTP/1.1 200 3196 ms crawled 2026-05-15

JP · 52.198.218.152 · AS16509 Amazon.com, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Mackerel: A Revolutionary Server Management and Monitoring Service
Description
With a quick and easy setup, you can be monitoring and managing your servers and visualizing metric data right away with our user-friendly API.
Language
en
Generator
HubSpot
Canonical
https://en.mackerel.io

Open Graph

url
https://en.mackerel.io
title
Mackerel: A Revolutionary Server Management and Monitoring Service
description
With a quick and easy setup, you can be monitoring and managing your servers and visualizing metric data right away with our user-friendly API.

Technology

CDN
Cloudflare
Analytics
  • Google Tag Manager

Third-party hosts loaded (4)

  • cdn.jsdelivr.net×2
  • cdnjs.cloudflare.com×1
  • code.jquery.com×1
  • www.googletagmanager.com×1

Social

DNS records live

NS
  • ns-1348.awsdns-40.org
  • ns-139.awsdns-17.com
  • ns-1606.awsdns-08.co.uk
  • ns-987.awsdns-59.net
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
Verified for
  • Google
  • Meta

Email authentication partial

SPF
v=spf1 a mx include:spf.mtasv.net include:sendgrid.net include:8911186.spf03.hubspotemail.net include:_spf.salesforce.com include:mail.zendesk.com -all
strict (-all)
DMARC
v=DMARC1; p=none; rua=mailto:dmarc@mackerel.io
policy: none (monitoring only)
DKIM
  • k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
  • smtpapi: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPtW5iwpXVPiH5FzJ7Nrl8USzuY9zqqzjE0D1r04xDN6qwziDnmgcFNNfMewVKN2D1O+2J9N14hRprzByFwfQW76…
selectors probed

Certificate (current)

Amazon RSA 2048 M01
from 2025-10-02 to 2026-11-01
Expires in 164 days

Full certificate history on crt.sh ↗

HTTP security headers

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

present
  • strict-transport-security
  • content-security-policy
  • referrer-policy
findings
  • missing frame protection
  • missing content type protection
  • missing Permissions Policy
Header values
referrer-policy
no-referrer-when-downgrade
content-security-policy
upgrade-insecure-requests
strict-transport-security
max-age=31536000

Links to (2)

Linked from (1)