Pagination & Subscriptions

Pagination via Cursors

For API endpoints that return massive lists, MCP supports cursor-based pagination. If a resource list response contains too much data, the server returns a nextCursor.

const listResources = async (cursor?: string) => {
  const result = await db.query({ limit: 100, cursor });
  return {
    resources: result.items.map(toResource),
    nextCursor: result.nextCursor
  };
};

Resource Subscriptions

MCP supports real-time updates! The Client can send a subscribe request for a specific URI. When the data changes, the Server pushes an event to the client over the transport telling it to re-fetch.