21st.dev

.dev crawl

First seen 2026-04-11 · Last seen 2026-05-15 · ok HTTP/1.1 200 271 ms crawled 2026-05-01

US · 216.150.1.1 · AS16509 Amazon.com, Inc.

Reputation 100/100

Classifying

HTML metadata

Title: 21st.dev — AI Agent Registry, UI Components & Developer Tools for the Agentic Internet | 21st
Description: Ship AI-powered products faster with 21st.dev. Browse the open AI agent registry, discover ready-to-use agent configs for Claude Managed Agents, copy React UI components, and build with the Agents SDK.
Language: en
Canonical: https://21st.dev

Open Graph

url: https://21st.dev
title: 21st.dev — AI Agent Registry, UI Components & Developer Tools for the Agentic Internet
site name: 21st
description: Ship AI-powered products faster with 21st.dev. Browse the open AI agent registry, discover ready-to-use agent configs for Claude Managed Agents, copy React UI components, and build with the Agents SDK.

Technology

CDN: Vercel
CMS: Next.js

Analytics

Google Tag Manager

Third-party hosts loaded (1)

www.googletagmanager.com×2

DNS records

Certificate (current)

R13

from 2026-04-29 to 2026-07-28

Expires in 70 days

Full certificate history on crt.sh ↗

Linked from (4)