Build Your App - Skybridge

Building an MCP App means answering four questions: what the model can do, what the user sees, what the model knows, and who is asking. Each page below covers one, in build order, on the same running example: a personal shopper with a product carousel and an authenticated checkout.

Define	Page	Core APIs
What the model can do	Register Tools	`registerTool`
What the user sees	Create Views	`useToolInfo`, `useCallTool`
What the model knows	Manage State	`useViewState`, `data-llm`
Who is asking	Authenticate Users	`requireBearerAuth`, `securitySchemes`

Register Tools

Define what humans and agents can do

Create Views

Craft interactive UIs rendered in conversation

Manage State

Decide what the model sees

Authenticate Users

Know who’s behind every tool call

Architecture Register Tools

⌘I