python-sdk/examples/servers/simple-task-interactive

Simple Interactive Task Server

A minimal MCP server demonstrating interactive tasks with elicitation and sampling.

Running

cd examples/servers/simple-task-interactive
uv run mcp-simple-task-interactive

The server starts on http://localhost:8000/mcp by default. Use --port to change.

What it does

This server exposes two tools:

confirm_delete (demonstrates elicitation)

Asks the user for confirmation before "deleting" a file.

• Uses task.elicit() to request user input
• Shows the elicitation flow: task -> input_required -> response -> complete

write_haiku (demonstrates sampling)

Asks the LLM to write a haiku about a topic.

• Uses task.create_message() to request LLM completion
• Shows the sampling flow: task -> input_required -> response -> complete

Usage with the client

In one terminal, start the server:

cd examples/servers/simple-task-interactive
uv run mcp-simple-task-interactive

In another terminal, run the interactive client:

cd examples/clients/simple-task-interactive-client
uv run mcp-simple-task-interactive-client

Expected server output

When a client connects and calls the tools, you'll see:

Starting server on http://localhost:8000/mcp

[Server] confirm_delete called for 'important.txt'
[Server] Task created: <task-id>
[Server] Sending elicitation request to client...
[Server] Received elicitation response: action=accept, content={'confirm': True}
[Server] Completing task with result: Deleted 'important.txt'

[Server] write_haiku called for topic 'autumn leaves'
[Server] Task created: <task-id>
[Server] Sending sampling request to client...
[Server] Received sampling response: Cherry blossoms fall
Softly on the quiet pon...
[Server] Completing task with haiku

Key concepts

1. ServerTaskContext: Provides elicit() and create_message() for user interaction
2. run_task(): Spawns background work, auto-completes/fails, returns immediately
3. TaskResultHandler: Delivers queued messages and routes responses
4. Response routing: Responses are routed back to waiting resolvers