Bug in the MCP Apps documentation. #3662

Initial Checks

• I confirm that I'm using the newest release of my line (the latest 2.x, or the latest 1.x if I'm still on v1)
• I confirm that I searched for my issue in https://github.com/modelcontextprotocol/python-sdk/issues before opening this issue

Release line

2.x (current stable)

Description

The Clock with a face example from the documentation has a small error in one of the keys of the HTML script that causes the example to not work.

The following line:

const text = event.data?.result?.content?.[0]?.text;

Should be replaced by:

const text = event.data?.params?.content?.[0]?.text;

If I'm understanding correctly, In JSON-RPC 2.0, a notification's payload lives under params.

I have tested it with MCPJam and the change works. I have a branch ready so I'm more than happy to open a PR. (I changed the stories server file and the docs_src as well)

Current behaviour (using result)

After the changes (using params)

Python & MCP Python SDK

Python 3.14
MCP 2.3.0