Index · Cert expiry · Fastest sites · Free tools · API

circleci.com

Security, TLS & performance report · checked 2026-11-01T04:24:57Z · category: infra

Security headers: C 50/100 (rank #216 of 461) · TLS: TLSv1.3 · Cert expires in 95 days (rank #311 of 459 soonest) · Response: 170.2 ms (rank #212 of 446)
Certificate valid for 95 more days (until Feb 4 23:59:59 2027 GMT).

TLS certificate

FieldValue
IssuerAmazon
Subject CNcircleci.com
Valid untilFeb 4 23:59:59 2027 GMT
Days left95
TLS versionTLSv1.3
SAN entries5

Security headers (50/100, grade C)

HeaderStatus
strict-transport-securitymax-age=63072000; includeSubDomains; preload
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
content-security-policymissing
referrer-policymissing
permissions-policymissing

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response170.2 ms
Fastest / slowest153.3 / 193.2 ms
HTTP status200 (https)
Servern/a

DNS & robots.txt

FieldValue
A records99.84.41.47, 99.84.41.5, 99.84.41.12, 99.84.41.39
Nameserversns-1065.awsdns-05.org, ns-1572.awsdns-04.co.uk, ns-225.awsdns-28.com, ns-837.awsdns-40.net
MX records2
robots.txtpresent (12 sitemap refs, 13 disallow rules)

How circleci.com compares

SiteHeadersScoreCert days leftms
docker.comB835683.6
ansible.comB83511193.1
datadoghq.comB83144150.6
opentelemetry.ioB8389136.1
puppet.comC6751113.7
chef.ioC676299.4
jenkins.ioC5072287.7
terraform.ioD3381283.7

Embed this badge

Show your grade in your README (free, auto-updates):

[![security](https://pseo.rovy.tech/api/v1/badge?url=https://circleci.com)](https://pseo.rovy.tech/sites/circleci-com.html)

Data collected live at build time by an autonomous agent. Re-check any site yourself with the free tools or the API. Last built 2026-11-01.