21st.dev is an open-source project built for react developers and frontend engineers.

Is 21st.dev still maintained?

Unverified. 21st.dev has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to 21st.dev?

Similar projects tracked by PulseGate include metaclass-registry, mcp-docker, and Snippet Shortcodes.

Does 21st.dev have an API or integrations?

Yes — 21st.dev exposes an MCP server.

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21st.dev

21st.devInfrastructure

21st.dev is a community-driven registry and library of hand-crafted React components and UI templates. It provides developers with polished, ready-to-use components via a web interface or MCP server, helping them build distinctive user interfaces efficiently.

Web

Visit 21st.dev

Overview

5 features

In the Frameworks & SDKs space, 21st.dev takes a focused approach. It focuses on accelerating UI development with high-quality, ready-to-use React components and templates. 21st.dev is an open-source project aimed at react developers and frontend engineers. It runs on the web.

21st.dev first shipped in 2024. Among its 5 catalogued features are react components, UI templates, and component variations. It exposes integrations via an MCP server.

Summary written by a language model from the project’s public pages.

React components
UI templates
Component variations
Web interface
MCP server integration

Built with & integrations

Framework

Next.js

Hosting

Vercel

Auth

clerk

Database

Supabase

Connectors

MCP

Runs on

Browser

Detected from

clerk: clerk in the HTML
Next.js: x-nextjs-prerender header · x-powered-by header · /_next/static/ in the HTML
Vercel: x-vercel-id header · x-vercel-cache header
Supabase: a-z0-9 in the HTML

Trust & compliance

Verified signals

HTTPS

Indexing history

What PulseGate has recorded for this listing

Nothing recorded for this listing in this window.

Frequently asked questions about 21st.dev

What is 21st.dev?: 21st.dev focuses on accelerating UI development with high-quality, ready-to-use React components and templates. It is catalogued under Frameworks & SDKs on PulseGate.
Who is 21st.dev for?: 21st.dev is an open-source project built for react developers and frontend engineers.
What platforms does 21st.dev run on?: 21st.dev runs on the web.
Is 21st.dev still maintained?: Unverified. 21st.dev has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to 21st.dev?: Similar projects tracked by PulseGate include metaclass-registry, mcp-docker, and Snippet Shortcodes.metaclass-registry mcp-docker Snippet Shortcodes
When did 21st.dev launch?: 21st.dev first shipped in 2024.
Does 21st.dev have an API or integrations?: Yes — 21st.dev exposes an MCP server.

At a glance

Pricing: Free
Platforms: Web
Languages: English
Built for: React developers and frontend engineers
Model: Open source
Solves: Accelerating UI development with high-quality, ready-to-use React components and templates.

Developer

21st

Live coverage

Identity confidence: High · 93.8
Indexed: 29 Jun 2026
Lifecycle: Unverified
Last seen: 29 Jun 2026

Identity audit (12)

Slug: 21st-dev-crafted-react-components-and-templates-that-fight-a-21st-dev
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 29 Jun 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 29 Jun 2026
Canonical URL: https://21st.dev/home

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