Is there a way to use toon in place of json for MCP server responses?

[amit-yo-9]

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Discussion Topic

TOON can significantly reduce token usage compared to JSON. I’m curious whether the Model Context Protocol (MCP) will evolve to support this format.
Toon vs Json

[Dumbris]

Just tried JSON→TOON conversion using the new mcpproxy code_execution feature (#627) 🎉

My prompt:

Read this post: https://dev.to/akki907/toon-vs-json-the-new-format-designed-for-ai-nk5. Then implement and run code that converts the tool's JSON output to TOON format, using the everything-server structuredContent tool. Output ONLY TOON data in code execution response

Code execution output:

{
  "ok": true,
  "value": "conditions: Partly cloudy\nhumidity: 65\ntemperature: 22.5\n"
}

Worked out of the box! The ability to call MCP tools from within code execution and transform their output is incredibly powerful. This makes it trivial to implement format converters and data transformations without needing dedicated servers.