chatgpt-app-builder

Build ChatGPT Apps with mcp-use

mcp-use is the full stack TypeScript framework for building MCP servers and MCP apps to plug-ins and Claude connectors

Use it to build fully typed MCP servers with tools, resources, prompts, 1 line oauth authentication adapters, middleware, production transports, a built-in Inspector, and headless tooling.

mcp-use has native first class support for MCP Apps with support for HMR both at the server and MCP App level to live preview the changes on clients like ChatGPT

Get started

Follow the guides at https://docs.mcp-use.com/v2.

API reference

Consult the TSDoc bundled in the installed package and the TypeScript source comments on disk. Inspect the project's installed mcp-use version, generated types, and existing ChatGPT-specific integrations before choosing APIs or patterns.

Agent Skills

Put reusable agent workflows in skills/<name>/SKILL.md; the directory is served automatically, so normally omit the skills server option. Use skills: false to disable it or skills: { directory: "server-skills" } to override the project-relative directory. Keep supporting references, scripts, templates, and assets in the skill instead of inflating tool descriptions.