Advanced MCP Features

# Progress Updates <EpicVideo url="https://www.epicai.pro/workshops/advanced-mcp-features-flccv/progress-updates~a3g0l" /> 👨‍💼 When users ask our mcp server to generate their journal wrapped video, it can take some time and they want to know that things are moving along. Nobody likes staring at a blank screen, wondering if the app is frozen or if their request was even received. Progress updates are how we keep users in the loop, making the wait feel shorter and the experience more delightful. Here's an example of how to perform progress updates in your MCP server: ```ts agent.server.registerTool( 'make_sandwich', { description: 'Make a sandwich', inputSchema: { ingredients: z.array(z.string()), }, }, async ({ ingredients }, { sendNotification, _meta }) => { // ... const orderStatus = await assembleSandwichOrder({ ingredients, onProgress: (progress) => { const { progressToken } = _meta ?? {} if (!progressToken) return void sendNotification({ method: 'notifications/progress', params: { progressToken, progress, total: 1, message: `Stacking pickles...`, }, }) }, }) }, // ... ) ``` <callout-success> Progress updates can be as simple as a percentage, or as fun as a custom message. The key is to keep users informed while they wait. </callout-success> ```mermaid sequenceDiagram User->>App: Place custom sandwich order (with progressToken) loop While processing App-->>User: notifications/progress (progress, total, message) end App-->>User: Sandwich ready! ``` <callout-muted> 📜 For more details on how to implement progress notifications, see the [MCP Progress Documentation](https://modelcontextprotocol.io/specification/2025-06-18/basic/utilities/progress). </callout-muted> The goal is to make waiting feel like part of the experience, not a chore. Progress updates turn a long-running task into a journey the user can follow, one delicious layer at a time. Test this one out in the MCP inspector by using the `create_wrapped_video` tool. <callout-info> **NOTE**: This particular tool requires ffmpeg to be installed globally on your machine. If it is not, you can still test this out using the mock time input (you just won't get the video actually generated). </callout-info>