Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers
TypeScript · active 2025-11-21 → 2026-07-22 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 244 days from 2025-11-21 to 2026-07-22. Pushes: 744 total, peak 41 in a day. Pull requests: 244 total, peak 14 in a day. Issues: 83 total, peak 6 in a day. Comments: 377 total, peak 15 in a day. Stars: 710 total, peak 69 in a day.
- Pushes
- Pull requests
- Issues
- Comments
- Stars
Stars, PRs, issues and forks are under-captured in the later part of this window. GH Archive progressively stopped capturing non-push events during 2026 — −95% or worse by the end of the window. Every series here except Pushes fades for that reason, so a decline above reflects the archive, not this repository. Pushes stay reliable throughout, so read them, and the contributor counts derived from them, as the real signal. Data health has the measurements.
Top contributors
Pushes, PRs, issues, reviews and comments — stars and forks excluded, so this is contribution rather than popularity
| Contributor | Contributions | Pushes | PRs | Comments |
|---|---|---|---|---|
| ochafik | 771 | 554 | 89 | 45 |
| jonathanhefner | 163 | 37 | 51 | 41 |
| idosal | 113 | 36 | 11 | 38 |
| pkg-pr-new[bot] | 92 | 0 | 0 | 92 |
| antonpk1 | 75 | 29 | 16 | 8 |
| liady | 64 | 14 | 6 | 25 |
| martinalong | 57 | 25 | 10 | 14 |
| Copilot | 34 | 2 | 4 | 18 |
| github-actions[bot] | 24 | 24 | 0 | 0 |
| github-code-quality[bot] | 23 | 0 | 0 | 17 |
| localden | 22 | 14 | 4 | 2 |
| github-advanced-security[bot] | 17 | 0 | 0 | 11 |
| matteo8p | 12 | 0 | 3 | 7 |
| dependabot[bot] | 8 | 2 | 5 | 1 |
| fredericbarthelet | 7 | 0 | 2 | 4 |
| Avcharov | 7 | 0 | 5 | 2 |
| ThalesMMS | 7 | 0 | 1 | 4 |
| aharvard | 6 | 0 | 0 | 3 |
| hybrist | 6 | 0 | 1 | 3 |
| jerome3o-anthropic | 6 | 2 | 3 | 0 |
Recent activity
Latest issues, pull requests and releases
- Pull request#679mel-anthropic2026-05-31 00:45
- Issue#676chelojimenez2026-05-28 03:08Should hostCapabilities.appTools exist?
- Issue#665les22026-05-23 23:43@modelcontextprotocol/ext-apps consumers ship ~140K of unused zod v4 locale files in browser bundles
- Issue#6618bnns2026-05-18 00:55,.
- Issue#6618bnns2026-05-18 00:55,.
- Issue#655saaage2026-05-06 23:22McpUiHostCapabilities missing tools field — widget-declared tools unimplementable by hosts
- Pull request#653hydrosquall2026-05-06 04:24
- Issue comment#627hydrosquall2026-05-06 01:09docs: add community-examples page
- Issue#646zekebergida2026-04-28 15:17basic-host does not forward toolResult _meta to the ui.
- Issue comment#558hydrosquall2026-04-25 04:14ui/update-model-context: How should hosts handle multiple instances of the same app resource?
- Issue#634MelkiorS2026-04-22 02:38Spec 2026-01-26: misleading "View initialize" example uses `initialize` + `clientInfo` instead of `ui/initialize` + `appInfo`
- Pull request#623ochafik2026-04-21 10:45
- Pull request#622ochafik2026-04-21 10:25
- Issue comment#615iraritchiemeek2026-04-20 00:11Claude MCP App renders blank (works in Inspector)
- Issue comment#542kentcdodds2026-04-15 00:33PostMessageTransport: Race condition with srcdoc iframes — host misses ui/initialize
- Pull request#610halllo2026-04-11 20:32
- Issue comment#542kentcdodds2026-04-10 17:17PostMessageTransport: Race condition with srcdoc iframes — host misses ui/initialize
- Pull request#604AngeloGiacco2026-04-07 15:59
- Issue#599Gingiris2026-04-04 00:26💡 Idea: Growth strategy for MCP extension ecosystem
- Pull request#594JiwaniZakir2026-04-02 12:09
- Pull request#593ochafik2026-04-02 08:13
- Issue comment#587pkg-pr-new[bot]2026-04-02 04:46fix(pdf-server): translucent highlights, pinch to/from fullscreen, toolbar layout
- Issue comment#584pkg-pr-new[bot]2026-04-02 02:59fix(pdf-server): npx DOMMatrix crash + broken MCPB bundle
- Pull request#584ochafik2026-04-02 02:56
- Pull request#582ochafik2026-04-01 23:54
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 710 stars here means stars gained during the window, not the repo's star count.