Manifest UI

39 MIT shadcn blocks sized for ChatGPT Apps and MCP app surfaces

Tier B · UsefulBlock CollectionRegistryComponent Libraryui.manifest.build

(Visit ui.manifest.build ↗)(Docs)(Repository)(Registry)

Manifest UI is an open-source shadcn/ui registry of 39 blocks aimed specifically at ChatGPT Apps and MCP apps — the constrained panels an assistant renders inside a conversation. The catalog is organised by use case rather than by primitive: Blogging, Events, Forms, Lists & Tables, Map, Messaging, Payment, Selection, Social and Status & Progress. Blocks install one at a time with the shadcn CLI under the @manifest namespace and lean on Tailwind v4 theming so they inherit the host surface's tokens. It is early — 34 stars, nine commits — but it targets a real gap that general block libraries ignore.

Install

npx shadcn@latest add @manifest/table

For an agent

Reach for this when the deliverable is a widget rendered inside ChatGPT or an MCP client rather than a full page — the blocks are already sized and themed for that cramped, token-inheriting context, which is exactly what AI Elements and shadcnblocks do not cover. It composes with AI Elements: use AI Elements for the conversation shell and Manifest UI for the domain payloads an app returns (ticket tiers, order confirm, event detail, map carousel). Treat it as early software: 34 stars, nine commits, no push since February 2026, so read each block's source before shipping and expect to maintain it yourself.

Why it is here. ChatGPT Apps and MCP apps are a new render target with real layout constraints, and this is one of the first open registries built for it instead of retrofitted from web page blocks.

Install command, framework, licence and component list.

Facts

License: MIT
Pricing: Free, Open source
Framework: React, Next.js
Styling: Tailwind CSS v4, CSS custom properties
Distribution: shadcn registry, CLI installer, Copy-paste snippet, GitHub repository
Platform: Web
Content type: Code
Agent readiness: Machine-readable registry item, CLI installable, Copy-paste ready code, Readable open source
Accessibility: Built on accessible primitives
Maturity: Beta
GitHub stars: 34

Components it ships

39 total

Helps you build

AI Chat Panel Chat Web App Single Item Detail Search Results Filtering Items Submitting A Form Making A Card Payment Checkout Order Status Blog Post Map View

Notable for

Built for ChatGPT Apps and MCP app surfaces
39 blocks grouped by use case, not primitive
MIT and installable via shadcn CLI
Tailwind v4 token inheritance
Low activity: 9 commits, stale since Feb 2026

Provenance

Verified 2026-08-15. HTTP 200. https://ui.manifest.build, https://ui.manifest.build/blocks, https://github.com/mnfst/manifest-ui, https://api.github.com/repos/mnfst/manifest-ui

Also in AI Interface Kits

ui.manifest.buildTier B