Convert JSON to TOON (about 43% fewer LLM tokens) and TOON back to JSON. Free, no auth.
Connect Remote server
claude mcp add --transport http json2toon https://json2toon.co/api/mcp
{
"mcpServers": {
"json2toon": {
"url": "https://json2toon.co/api/mcp"
}
}
}
{
"servers": {
"json2toon": {
"type": "http",
"url": "https://json2toon.co/api/mcp"
}
}
}
Settings > Connectors > Add custom connector
URL: https://json2toon.co/api/mcp
Tools 2 found in our last check
json_to_toonConvert JSON to TOON (Token-Oriented Object Notation), a compact format that uses about 43% fewer LLM tokens than JSON on average. Best for uniform arrays of objects.
toon_to_jsonDecode a TOON document back to pretty-printed JSON.
Details
| Endpoint | https://json2toon.co/api/mcp (Streamable HTTP) |
| First published | 9 Oct 2026 |
| Last updated | 9 Oct 2026 |
| Registry name | io.github.karta9821/json2toon |
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