indexo.dev

techletter.app

.app crawl

First seen 2026-06-03 · Last seen 2026-06-03 · ok HTTP/1.1 200 112 ms crawled 2026-06-03

US · 66.33.60.129 · AS16509 Amazon.com, Inc.

Reputation 100/100

Classifying

HTML metadata

Title
TechLetter.App - Build Better Newsletters
Description
Write markdown, get newsletter. 💌 🐦 Tweets, 📹 YouTube, 🎨 images, and 🤖 code turn into thumbnails. Save 15+ minutes per newsletter 🤘
Language
en

Open Graph

url
https://techletter.app
title
TechLetter.App - Build Better Newsletters
video
https://techletter.app/examplevideo.mp4
site name
TechLetter.App - Build Better Newsletters
description
Write markdown, get newsletter. 💌 🐦 Tweets, 📹 YouTube, 🎨 images, and 🤖 code turn into thumbnails. Save 15+ minutes per newsletter 🤘

Technology

CDN
Vercel
CMS
Gatsby

Third-party hosts loaded (2)

  • api.simpleanalytics.io×1
  • cdn.simpleanalytics.io×1

DNS records live

NS
  • ns1.vercel-dns.com
  • ns2.vercel-dns.com

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-04-27 to 2026-07-26
Expires in 50 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://techletter.app/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=63072000

Linked from (1)