indexo.dev

buildwithfern.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 1154 ms crawled 2026-05-18

US · 3.164.206.16 · AS16509 Amazon.com, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Fern: SDKs and Docs for your API
Description
Start with OpenAPI. Generate SDKs in multiple languages and interactive API documentation.
Language
en
Canonical
https://buildwithfern.com

Open Graph

title
Fern: SDKs and Docs for your API
description
Start with OpenAPI. Generate SDKs in multiple languages and interactive API documentation.

Technology

CDN
Cloudflare
CMS
Gatsby
Analytics
  • Google Tag Manager

Third-party hosts loaded (5)

  • cdn.prod.website-files.com×213
  • cdn.jsdelivr.net×1
  • d3e54v103j8qbb.cloudfront.net×1
  • px.ads.linkedin.com×1
  • www.googletagmanager.com×1

Social

Registration

Registrar
Amazon Registrar, Inc.
Created
2022-04-22
Expires
2027-04-22 337 days left
Updated
2026-05-15
Name servers
  • ns-1258.awsdns-29.org
  • ns-1962.awsdns-53.co.uk
  • ns-264.awsdns-33.com
  • ns-993.awsdns-60.net

DNS records live

NS
  • ns-1258.awsdns-29.org
  • ns-1962.awsdns-53.co.uk
  • ns-264.awsdns-33.com
  • ns-993.awsdns-60.net
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
TXT
Show 5 TXT records
  • stripe-verification=daf5437703c095af15e1db9f784e9fecc2f5bd49d74979539a81b21647284472
  • turbopuffer-domain-verification-7xwpb9=HoCgaT3MJCkWFjQPKHPD2zM4C
  • amazon-business-verification=b39b018f65ce588ba1a49e82deeae121add7c832c99719118236bcc0f6736d00
  • anthropic-domain-verification-3qybyc=nwiMxNKQZnN8y4JKdIxk8MW7P
  • atlassian-domain-verification=kblbMYsB2Ed5uNZaWJHzsWhuSKvGaWbIRAU3gFrZO1vYsUrQjD4auRjpYAPN3J1a

Email authentication partial

SPF
v=spf1 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1;p=none;sp=none;pct=100;rua=mailto:dmarc@buildwithfern.com;ruf=mailto:dmarc@buildwithfern.com;ri=86400;aspf=s;adkim=s;fo=1
policy: none (monitoring only) · sp=none
DKIM
  • google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCQEWEw7GlHtn6zXNPYe6WCDjc8VvY2Vtvvf6Pxl5Ql+FVgDiAYcHZzfFTdU3ycXb9l+tGfdYXxoDoKE5rMJN…
selectors probed

Certificate (current)

Amazon RSA 2048 M01
from 2026-02-27 to 2026-09-13
Expires in 116 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 80/100 Checked live page: https://buildwithfern.com/

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
findings
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
SAMEORIGIN
content-security-policy
frame-ancestors 'self'
strict-transport-security
max-age=31536000; includeSubDomains; preload

Links to (33)

Linked from (2)