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JSON to TOON

Official registry Security

Convert JSON to TOON (about 43% fewer LLM tokens) and TOON back to JSON. Free, no auth.

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http json-to-toon 'https://json2toon.co/api/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "json-to-toon": {
            "type": "http",
            "url": "https://json2toon.co/api/mcp"
        }
    }
}

Frequently asked questions

What is JSON to TOON?

Convert JSON to TOON (about 43% fewer LLM tokens) and TOON back to JSON. Free, no auth.

How do I install JSON to TOON?

It runs as a remote server. In Claude Code: claude mcp add --transport http json-to-toon 'https://json2toon.co/api/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does JSON to TOON need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains JSON to TOON?

It is published by karta9821. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.