@maxhealth.tech/prefab / mcp / resourceMeta

Function: resourceMeta()

function resourceMeta(options?): object;

Defined in: mcp/resource.ts:95

Generate the _meta object for MCP Apps ui:// resource registration.

Includes CSP and Permission Policy configuration per the MCP Apps spec. Use on both the resource listing AND the content item (VS Code reads only the content item; other hosts may read either).

Parameters

Parameter	Type
options?	ResourceMetaOptions

Returns

object

ui

ui: object;

ui.csp?

optional csp?: McpAppCsp;

ui.permissions?

optional permissions?: McpAppPermissionsWire;

Example

const meta = resourceMeta({
  csp: { resourceDomains: ['https://cdn.jsdelivr.net'] },
  permissions: { camera: true },
})

server.registerResource('viewer', 'ui://my/viewer', {
  mimeType: 'text/html;profile=mcp-app',
  _meta: meta,
  cacheHint: { ttlMs: 86_400_000, cacheScope: 'public' },
}, (uri) => Promise.resolve({
  contents: [{ uri: uri.toString(), mimeType: 'text/html;profile=mcp-app', text: html, _meta: meta }],
  ttlMs: 86_400_000,
  cacheScope: 'public',
}))

// The UI resource is associated with a tool on the tool DEFINITION, not
// on its result:
server.registerTool('browse', {
  title: 'Browse',
  inputSchema: schema,
  _meta: { ui: { resourceUri: 'ui://my/viewer' } },
}, (args) => display(autoTable(rows)))