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Toon MCP
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Toon MCP

The TOON MCP server is a tool for optimizing LLM costs. By converting JSON to a more compact TOON format, it can achieve 18 - 40% token savings and supports encoding, decoding, validation, and statistical functions.
Developer toolsResearch and data#Data compression#Format conversion#Cost optimization.Rust
2.5 points
0
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Overview

Installation

Content Details

Alternatives

What is the TOON MCP Server?

The TOON MCP Server is a Model Context Protocol server dedicated to data format conversion and optimization. It can convert standard JSON data into a more compact TOON format, significantly reducing the number of tokens required by AI models to process data and helping users save costs.

How to use the TOON MCP Server?

Connect to the TOON server by configuring an MCP client (such as Claude Desktop, Cursor IDE, etc.), and then use the provided tools for conversion, validation, and statistical analysis between JSON and TOON formats.

Applicable scenarios

Suitable for scenarios that require frequent sending of structured data to AI models, such as API development, data analysis, configuration management, log processing, etc., especially when the data volume is large or the cost of AI usage needs to be controlled.

Main features

TOON encoding
Convert JSON data into a compact TOON format, supporting options for custom delimiters, indentation, and key folding.
TOON decoding
Convert TOON format data back to standard JSON format, supporting strict validation and type conversion.
Format validation
Check the syntax correctness of TOON data without full decoding, quickly validating the data format.
Statistical analysis
Compare the byte size and number of tokens of JSON and TOON formats, showing the percentage of savings.
Multi - client support
Supports multiple MCP clients such as Claude Desktop, Claude Code CLI, Cursor IDE, etc.
Highly configurable
Provides a variety of configuration options, such as delimiter selection, indentation settings, key folding depth, etc.
Advantages
Significant cost savings: Reduce token usage by 18 - 40%, lowering the cost of AI model calls
Data compression: The TOON format is more compact than JSON, reducing data transmission and storage overhead
Easy integration: Supports multiple popular MCP clients with simple configuration
Comprehensive functions: Provides a complete set of tools for encoding, decoding, validation, statistics, etc.
Open - source and free: Based on the MIT license, it can be freely used and modified
Limitations
Learning curve: Need to understand the differences between the TOON format and JSON
Compatibility: Some systems may only support the standard JSON format
Debugging difficulty: The readability of the TOON format may be inferior to that of formatted JSON
Dependence on MCP: Requires MCP client support to use

How to use

Install the server
Compile the TOON MCP server program using the Rust build tool.
Configure the client
Add TOON server settings to the configuration file according to the MCP client you are using.
Start the connection
Restart the MCP client, and the system will automatically connect to the TOON server.
Use the tools
Call TOON tools such as toon_encode, toon_decode, etc. in AI conversations.

Usage examples

API data optimization
Before sending API response data to the AI model, convert JSON to TOON format to reduce token consumption.
Configuration file management
Convert the JSON configuration file of the application to a more compact TOON format for easy AI analysis.
Data format validation
Verify the correctness of the TOON format in the data processing flow to ensure data integrity.
Cost analysis
Compare the cost differences between different data formats and select the most economical format for the project.

Frequently Asked Questions

What is the difference between the TOON format and JSON?
What do I need to install to use the TOON MCP Server?
Is the TOON format compatible with all JSON features?
How can I view the savings of the TOON format?
Is TOON data readable?
Does it support batch conversion?

Related resources

GitHub repository
The source code and latest version of the TOON MCP Server
Model Context Protocol documentation
The official specification and documentation of the MCP protocol
Rust programming language
The programming language used by the TOON server
TOON format specification
Detailed specification and examples of the TOON data format
Problem feedback and discussion
Report problems, propose feature suggestions, or participate in discussions

Installation

Copy the following command to your Client for configuration
{
  "mcpServers": {
    "toon": {
      "command": "/path/to/toon-mcp"
    }
  }
}
Note: Your key is sensitive information, do not share it with anyone.

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