mcp-app-builder

Installation
SKILL.md

MCP App Builder

Use when

  • Build a hosted MCP server or ChatGPT app.
  • Add or refine widget UI for an MCP tool flow.
  • Wrap an API or product surface with MCP.
  • Choose between server-only, server + UI, and MCPB.
  • Add auth, testing, troubleshooting, or submission readiness to an existing app.

Do not use when

  • The task is generic non-OpenAI MCP work where ChatGPT and Apps SDK compatibility do not matter.
  • The task is only about Codex plugin packaging, local skill packaging, or Cursor configuration.
  • The job is already a known MCPB packaging task with platform-specific distribution details that exceed these references.

Defaults

  • Classify first: server-only, server + UI, or MCPB.
Related skills
Installs
1
First Seen
Apr 6, 2026