Community vs Custom Servers

Every MCP integration starts with a fork in the road: do you adopt a community server someone already built, or write a custom one from scratch?

The exam-grade default is clear: prefer proven community MCP servers for standard integrations. Reach for a custom server only when your need is genuinely non-standard.

This lesson teaches you to make that call like an architect — weighing maintenance, security, and capability, not just lines of code.

Before choosing, recall what a server exposes. MCP servers offer three primitives:

• Tools — actions the model can invoke (create an issue, run a query).
• Resources — read-only data and context (schemas, catalogs, files).
• Prompts — reusable templates.

A "standard integration" — GitHub, Postgres, Slack, filesystem — almost always maps onto these primitives in a way the community has already solved. That overlap is exactly why adopting beats rebuilding.