MCP Elicitation UI Example

This example demonstrates how to use the MCP (Model Context Protocol) elicitation feature in a Next.js application with a chat interface.

How It Works

1. User sends a message requesting an action (e.g., "register me as a new user")
2. AI model calls the appropriate MCP tool (e.g., register_user)
3. MCP server requests user input via an elicitation request with a JSON schema
4. Frontend displays a modal form based on the schema
5. User fills in the form and submits, declines, or cancels
6. Response is sent back to the MCP server
7. Tool execution completes and the AI model continues the conversation

Setup

1. Start the MCP Server

pnpm tsx src/elicitation-ui/server.ts

This will start the server on http://localhost:8085.

2. Run the Next.js Application

cd examples/ai-e2e-next
pnpm dev

4. Open the Example

Navigate to http://localhost:3000/mcp-elicitation

Usage

1. Type a message in the chat input, such as:

   • "register me as a new user"
   • "help me sign up for an account"
   • "I'd like to create a new account"

2. The AI will call the register_user tool, which triggers an elicitation request.

3. A modal will appear asking you to fill in registration information:

   • Username (required)
   • Email (required)
   • Password (required)
   • Newsletter subscription (optional, defaults to false)

4. You can:

   • Submit: Accept and send the filled form data
   • Decline: Reject providing the information
   • Cancel: Cancel the entire operation

5. The conversation continues based on your response.

This example involves working with human-in-the-loop tools and MCP Elicitation requests.