Build mcp-use Server

Server-side mechanics for mcp-use/server TypeScript MCP servers. This skill owns API surface; sister skills own structure, clients, agents, and raw SDK.

When to use this skill

Trigger when the target code or request involves any of these:

• Imports from mcp-use/server (MCPServer, text, object, mix, error, widget, Logger).
• Defining or refining server.tool(), server.resource(), server.prompt(), server.uiResource() with Zod schemas.
• Server-side ctx work — ctx.auth, ctx.elicit(), ctx.sample(), ctx.notify(), ctx.client.can(), ctx.client.supportsApps().
• Configuring transports (Streamable HTTP, stateless, stdio), session stores, OAuth (DCR or proxy), CORS, allowedOrigins, DNS rebinding.
• MCP Apps / ChatGPT Apps widgets — widgetMetadata, text/html;profile=mcp-app, text/html+skybridge, McpUseProvider, useCallTool, useWidget, CSP.
• Running mcp-use dev, mcp-use build, mcp-use start, mcp-use deploy, mcp-use generate-types, or debugging via Inspector / curl handshake on /mcp.
• Hardening for production: health/readiness routes, graceful shutdown, rate limits, deploy to mcp-use Cloud, Vercel, Cloud Run, Fly, Cloudflare Workers, Deno Deploy, Supabase.
• Migrating from raw @modelcontextprotocol/sdk server code, mcp-use v1, or appsSdk widgets to current mcp-use/server.

Do not use this skill when: