MCP Apps (spec and SDK)
The official specification and SDK for MCP Apps: interactive UIs served by MCP servers inside AI chat clients.
Sources and review
Checked against public documentation on . Suitability guidance is our editorial judgment; this is not a performance benchmark or an endorsement.
Building tool UIs that work across every MCP Apps-compatible chat client.
About MCP Apps (spec and SDK)
This official MCP repository holds the MCP Apps specification and SDK for building interactive interfaces, such as charts, forms and dashboards, that MCP servers render inline in Claude, ChatGPT and other compliant clients. It includes starter templates, examples and agent skills that scaffold a new MCP App or migrate an OpenAI Apps SDK app.
MCP Apps (spec and SDK) is listed in this index written primarily in TypeScript, with 3.0k stars on GitHub. Its latest recorded repository push was in October 2026; that is not an ASE editorial review date.
npm install -S @modelcontextprotocol/ext-appsMCP Apps (spec and SDK) and related category tools
Alternatives guide →| Record | Stars | Pricing | ||
|---|---|---|---|---|
| MCP Apps (spec and SDK)this listing | 3.0k | TypeScript | MIT AND Apache-2.0 | Costs not checked |
| MCP Go SDK (official) | 5.3k | Go | MIT AND Apache-2.0 | Costs not checked |
| MCP TypeScript SDK (official) | 14k | TypeScript | MIT AND Apache-2.0 | Costs not checked |
| MCP Python SDK (official) | 25k | Python | MIT | Costs not checked |
| MCP Swift SDK (official) | 1.6k | Swift | MIT AND Apache-2.0 | Costs not checked |
| mcp-use | 11k | TypeScript | MIT | Costs not checked |
