modelcontextprotocol/ext-apps
Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers observed · 2026-08-28
Health v2 · maintenance only
81/100
- Activity 97
- Release rhythm 94
- Longevity 20
Flags: no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 2.5
- age_days: 285
- days_rel: 41
- days_push: 21
- n_releases_24m: 35
Adoption not part of the score
2766 stars · 370 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Official specification and TypeScript SDK for the MCP Apps protocol, a standard for building interactive UIs (charts, forms, dashboards) that render inline in AI chat clients like Claude and ChatGPT. It also ships Agent Skills for scaffolding and migrating MCP Apps.
Use cases
- build interactive UIs for MCP tools
- embed charts and dashboards in AI chatbots
- add UI to an existing MCP server's tools
- convert an OpenAI App to MCP Apps
- turn a web app into a hybrid web + MCP App
When to choose
- you serve MCP tools and want rich interactive UIs rendered inline in chat clients
- you want to follow the official MCP Apps specification
- you need SDK support plus scaffolding skills for building MCP Apps
When to avoid
- you only need text or structured data responses from MCP tools
- your target chat client does not support the MCP Apps extension
- you need a standalone web app framework unrelated to MCP
Facets
library · maturity active
mcp ui-components sdk frontend-framework large-language-models web-development frontend browser mcp-apps model-context-protocol embedded-ui chat-clients specification agent-skills ai-agents typescript nodejs web-server
3 sources
- readme: https://github.com/modelcontextprotocol/ext-apps · fetched 2026-08-28 · 367d8d1e1f79
- homepage: https://apps.extensions.modelcontextprotocol.io/ · fetched 2026-08-29 · 377bee76e68a
- site_page: https://apps.extensions.modelcontextprotocol.io/api · fetched 2026-08-29 · 49fb0e1b5cdc
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| modelcontextprotocol/ext-apps | main | 81 |
For agents
markdown · JSON · MCP: product_card(name="modelcontextprotocol/ext-apps")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem