Resource Fundamentals — Resources

Resources are Read-Only Data

Unlike Tools (which do things), Resources expose data for the AI to inspect. Think of them as files, database rows, or standard operating procedures.

Defining a Static Resource

server.registerResource(
  "company-handbook",                     // Name
  "file:///docs/handbook.md",             // URI
  { title: "Company Handbook", description: "HR Policies", mimeType: "text/markdown" },
  async (uri) => {
    return {
      contents: [{
        uri: uri.href,
        text: "Handbook contents go here..."
      }]
    };
  }
);

All Resources are identified by a URI. The client can fetch the exact content of the resource via string paths.